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Belyk M, Carignan C, McGettigan C. An open-source toolbox for measuring vocal tract shape from real-time magnetic resonance images. Behav Res Methods 2024; 56:2623-2635. [PMID: 37507650 PMCID: PMC10990993 DOI: 10.3758/s13428-023-02171-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2023] [Indexed: 07/30/2023]
Abstract
Real-time magnetic resonance imaging (rtMRI) is a technique that provides high-contrast videographic data of human anatomy in motion. Applied to the vocal tract, it is a powerful method for capturing the dynamics of speech and other vocal behaviours by imaging structures internal to the mouth and throat. These images provide a means of studying the physiological basis for speech, singing, expressions of emotion, and swallowing that are otherwise not accessible for external observation. However, taking quantitative measurements from these images is notoriously difficult. We introduce a signal processing pipeline that produces outlines of the vocal tract from the lips to the larynx as a quantification of the dynamic morphology of the vocal tract. Our approach performs simple tissue classification, but constrained to a researcher-specified region of interest. This combination facilitates feature extraction while retaining the domain-specific expertise of a human analyst. We demonstrate that this pipeline generalises well across datasets covering behaviours such as speech, vocal size exaggeration, laughter, and whistling, as well as producing reliable outcomes across analysts, particularly among users with domain-specific expertise. With this article, we make this pipeline available for immediate use by the research community, and further suggest that it may contribute to the continued development of fully automated methods based on deep learning algorithms.
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Affiliation(s)
- Michel Belyk
- Department of Psychology, Edge Hill University, Ormskirk, UK.
| | - Christopher Carignan
- Department of Speech Hearing and Phonetic Sciences, University College London, London, UK
| | - Carolyn McGettigan
- Department of Speech Hearing and Phonetic Sciences, University College London, London, UK
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2
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Tian Y, Nayak KS. New clinical opportunities of low-field MRI: heart, lung, body, and musculoskeletal. MAGMA (NEW YORK, N.Y.) 2024; 37:1-14. [PMID: 37902898 PMCID: PMC10876830 DOI: 10.1007/s10334-023-01123-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 09/28/2023] [Accepted: 10/05/2023] [Indexed: 11/01/2023]
Abstract
Contemporary whole-body low-field MRI scanners (< 1 T) present new and exciting opportunities for improved body imaging. The fundamental reason is that the reduced off-resonance and reduced SAR provide substantially increased flexibility in the design of MRI pulse sequences. Promising body applications include lung parenchyma imaging, imaging adjacent to metallic implants, cardiac imaging, and dynamic imaging in general. The lower cost of such systems may make MRI favorable for screening high-risk populations and population health research, and the more open configurations allowed may prove favorable for obese subjects and for pregnant women. This article summarizes promising body applications for contemporary whole-body low-field MRI systems, with a focus on new platforms developed within the past 5 years. This is an active area of research, and one can expect many improvements as MRI physicists fully explore the landscape of pulse sequences that are feasible, and as clinicians apply these to patient populations.
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Affiliation(s)
- Ye Tian
- Ming Hsieh Department of Electrical and Computer Engineering, Viterbi School of Engineering, University of Southern California, 3740 McClintock Ave, EEB 406, Los Angeles, CA, 90089-2564, USA.
| | - Krishna S Nayak
- Ming Hsieh Department of Electrical and Computer Engineering, Viterbi School of Engineering, University of Southern California, 3740 McClintock Ave, EEB 406, Los Angeles, CA, 90089-2564, USA
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3
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Biggemann L, Uhlig J, Streit U, Al-Bourini O, Wedi E, Amanzada A, Ellenrieder V, Rühlmann F, Ghadimi M, Frahm J, Uecker M, Seif Amir Hosseini A. Visualization of deglutition and gastroesophageal reflux using real-time MRI: a standardized approach to image acquisition and assessment. Sci Rep 2023; 13:22854. [PMID: 38129469 PMCID: PMC10739804 DOI: 10.1038/s41598-023-49776-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
This study aims to develop a standardized algorithm for gastroesophageal image acquisition and diagnostic assessment using real-time MRI. Patients with GERD symptoms undergoing real-time MRI of the esophagus and esophagogastric junction between 2015 and 2018 were included. A 10 ml bolus of pineapple juice served as an oral contrast agent. Patients performed Valsalva maneuver to provoke reflux and hiatal hernia. Systematic MRI assessment included visual presence of achalasia, fundoplication failure in patients with previous surgical fundoplication, gastroesophageal reflux, and hiatal hernia. A total of 184 patients (n = 92 female [50%], mean age 52.7 ± 15.8 years) completed MRI studies without adverse events at a mean examination time of 15 min. Gastroesophageal reflux was evident in n = 117 (63.6%), hiatal hernia in n = 95 (52.5%), and achalasia in 4 patients (2.2%). Hiatal hernia was observed more frequently in patients with reflux at rest (n = 67 vs. n = 6, p < 0.01) and during Valsalva maneuver (n = 87 vs. n = 8, p < 0.01). Real-time MRI visualized a morphologic correlate for recurring GERD symptoms in 20/22 patients (90%) after fundoplication procedure. In a large-scale single-center cohort of patients with GERD symptoms undergoing real-time MRI, visual correlates for clinical symptoms were evident in most cases. The proposed assessment algorithm could aid in wider-spread utilization of real-time MRI and provides a comprehensive approach to this novel imaging modality.
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Affiliation(s)
- Lorenz Biggemann
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany.
| | - Johannes Uhlig
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Ulrike Streit
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
- Department of Radiology, Klinikum Rechts Der Isar, School of Medicine, Technical University of Munich, München, Germany
| | - Omar Al-Bourini
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Edris Wedi
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Göttingen, Germany
- Department of Gastroenterology, Gastrointestinal Oncology and Interventional Endoscopy, Sana Klinikum, Offenbach, Germany
| | - Ahmad Amanzada
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Volker Ellenrieder
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Felix Rühlmann
- Department of General, Visceral, and Paediatric Surgery, University Medical Center, Göttingen, Germany
| | - Michael Ghadimi
- Department of General, Visceral, and Paediatric Surgery, University Medical Center, Göttingen, Germany
| | - Jens Frahm
- Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Martin Uecker
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
- Institute of Biomedical Imaging, Graz University of Technology, Graz, Austria
- Cluster of Excellence "Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
| | - Ali Seif Amir Hosseini
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
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4
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Isaieva K, Leclère J, Felblinger J, Gillet R, Dubernard X, Vuissoz PA. Methodology for quantitative evaluation of mandibular condyles motion symmetricity from real-time MRI in the axial plane. Magn Reson Imaging 2023; 102:115-125. [PMID: 37187265 DOI: 10.1016/j.mri.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 05/17/2023]
Abstract
Diagnosis of temporomandibular disorders is currently based on clinical examination and static MRI. Real-time MRI enables tracking of condylar motion and, thus, evaluation of their motion symmetricity (which could be associated with temporomandibular joint disorders). The purpose of this work is to propose an acquisition protocol, an image processing approach, and a set of parameters enabling objective assessment of motion asymmetry; to check the reliability and find the limitations of the approach, and to verify if the automatically calculated parameters are associated with the motion symmetricity. A rapid radial FLASH sequence was used to acquire a dynamic set of axial images for 10 subjects. One more subject was involved to estimate the dependence of the motion parameters on the slice placement. The images were segmented with a semi-automatic approach based on U-Net convolutional neural network, and the condyles' mass centers were projected on the mid-sagittal axis. Resulting projection curves were used for the extraction of various motion parameters including latency, velocity peak delay, and maximal displacement between the right and the left condyle. These automatically calculated parameters were compared with the physicians' scores. The proposed segmentation approach allowed a reliable center of mass tracking. Latency and velocity peak delay were found to be invariant to the slice position, and maximal displacement difference considerably varied. The automatically calculated parameters demonstrated a significant correlation with the experts' scores. The proposed acquisition and data processing protocol enables the automatizable extraction of quantitative parameters that characterize the symmetricity of condylar motion.
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Affiliation(s)
- Karyna Isaieva
- IADI, University of Lorraine, INSERM U1254, Nancy, France.
| | - Justine Leclère
- IADI, University of Lorraine, INSERM U1254, Nancy, France; Oral Medicine Department, University Hospital of Reims, Reims, France
| | - Jacques Felblinger
- IADI, University of Lorraine, INSERM U1254, Nancy, France; CIC-IT 1433, INSERM, CHRU de Nancy, Nancy, France
| | - Romain Gillet
- IADI, University of Lorraine, INSERM U1254, Nancy, France; Guilloz Imaging Department, CHRU of Nancy, Nancy, France
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5
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Alam W, Reineke S, Raja Viswanath M, Rusho RZ, Van Daele D, Meyer D, Liu J, Lingala SG. A flexible 16-channel custom coil array for accelerated imaging of upper and infraglottic airway at 3 T. Magn Reson Med 2023; 89:2117-2130. [PMID: 36484236 DOI: 10.1002/mrm.29559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 11/25/2022] [Accepted: 11/25/2022] [Indexed: 12/13/2022]
Abstract
PURPOSE To develop a custom coil and evaluate its utility for accelerated upper and infraglottic airway MRI at 3 T. METHODS A 16-channel flexible and anatomy-conforming coil was developed to provide localized sensitivity over upper and infraglottic airway regions of interest. Parallel-imaging capabilities were compared against existing head and head-neck coils. SENSE geometry factor losses were quantified for retrospectively accelerating 3D MRI. Blinded image-quality ratings from two experts were performed. Spiral GRAPPA reconstructions were evaluated for a speaking task at a time resolution of 40 ms. Contrast-to-noise ratios between air and tissue at key landmarks along the vocal tract were compared. SENSE imaging with the custom coil in the lateral recumbent posture was evaluated. Multislice imaging was performed to image swallowing at 17 ms/frame via constrained reconstruction. RESULTS The custom coil showed improved SENSE imaging up to 3-fold acceleration when accelerated along either the anterior-posterior or the superior-inferior direction and a net 4-fold acceleration when accelerated along both directions. Spiral GRAPPA reconstructions with the custom coil showed higher contrast-to-noise ratio when compared with existing coils. In the lateral posture, robust SENSE imaging was achieved at up to 2-fold and 3-fold acceleration levels in the superior-inferior and anterior-posterior directions, respectively. Key events of swallowing in the multislice dynamic images were identified by an otolaryngologist. CONCLUSION The coil provided improved parallel imaging of upper and infraglottic airway in both supine and lateral recumbent postures. It enabled efficient accelerated dynamic imaging of speaking and swallowing.
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Affiliation(s)
- Wahidul Alam
- Roy J. Carver Department of Biomedical Engineering, The University of Iowa, Iowa City, Iowa, USA
| | | | | | - Rushdi Zahid Rusho
- Roy J. Carver Department of Biomedical Engineering, The University of Iowa, Iowa City, Iowa, USA
| | - Douglas Van Daele
- Department of Otolaryngology, The University of Iowa, Iowa City, Iowa, USA
| | - David Meyer
- Janette Ogg Voice Research Center, Shenandoah University, Winchester, Virginia, USA
| | - Junjie Liu
- Department of Neurology, The University of Iowa, Iowa City, Iowa, USA
| | - Sajan Goud Lingala
- Roy J. Carver Department of Biomedical Engineering, The University of Iowa, Iowa City, Iowa, USA.,Department of Radiology, The University of Iowa, Iowa City, Iowa, USA
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Mialland A, Atallah I, Bonvilain A. Toward a robust swallowing detection for an implantable active artificial larynx: a survey. Med Biol Eng Comput 2023; 61:1299-1327. [PMID: 36792845 DOI: 10.1007/s11517-023-02772-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 01/04/2023] [Indexed: 02/17/2023]
Abstract
Total laryngectomy consists in the removal of the larynx and is intended as a curative treatment for laryngeal cancer, but it leaves the patient with no possibility to breathe, talk, and swallow normally anymore. A tracheostomy is created to restore breathing through the throat, but the aero-digestive tracts are permanently separated and the air no longer passes through the nasal tracts, which allowed filtration, warming, humidification, olfaction, and acceleration of the air for better tissue oxygenation. As for phonation restoration, various techniques allow the patient to talk again. The main one consists of a tracheo-esophageal valve prosthesis that makes the air passes from the esophagus to the pharynx, and makes the air vibrate to allow speech through articulation. Finally, swallowing is possible through the original tract as it is now isolated from the trachea. Yet, many methods exist to detect and assess a swallowing, but none is intended as a definitive restoration technique of the natural airway, which would permanently close the tracheostomy and avoid its adverse effects. In addition, these methods are non-invasive and lack detection accuracy. The feasibility of an effective early detection of swallowing would allow to further develop an implantable active artificial larynx and therefore restore the aero-digestive tracts. A previous attempt has been made on an artificial larynx implanted in 2012, but no active detection was included and the system was completely mechanic. This led to residues in the airway because of the imperfect sealing of the mechanism. An active swallowing detection coupled with indwelling measurements would thus likely add a significant reliability on such a system as it would allow to actively close an artificial larynx. So, after a brief explanation of the swallowing mechanism, this survey intends to first provide a detailed consideration of the anatomical region involved in swallowing, with a detection perspective. Second, the swallowing mechanism following total laryngectomy surgery is detailed. Third, the current non-invasive swallowing detection technique and their limitations are discussed. Finally, the previous points are explored with regard to the inherent requirements for the feasibility of an effective swallowing detection for an artificial larynx. Graphical Abstract.
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Affiliation(s)
- Adrien Mialland
- Institute of Engineering and Management Univ. Grenoble Alpes, Univ. Grenoble Alpes, CNRS, Grenoble INP, Gipsa-lab, 38000, Grenoble, France.
| | - Ihab Atallah
- Institute of Engineering and Management Univ. Grenoble Alpes, Otorhinolaryngology, CHU Grenoble Alpes, 38700, La Tronche, France
| | - Agnès Bonvilain
- Institute of Engineering and Management Univ. Grenoble Alpes, Univ. Grenoble Alpes, CNRS, Grenoble INP, Gipsa-lab, 38000, Grenoble, France
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7
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Biggemann L, Uhlig J, Gliem N, Al-Bourini O, Wedi E, Ellenrieder V, Ghadimi M, Uecker M, Frahm J, Lotz J, Hosseini ASA, Streit U. Assessment of esophagogastric junction morphology by dynamic real-time MRI: comparison of imaging features to high-resolution manometry. Jpn J Radiol 2021; 40:376-384. [PMID: 34874494 PMCID: PMC8977262 DOI: 10.1007/s11604-021-01210-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 10/11/2021] [Indexed: 11/30/2022]
Abstract
Purpose To assess the esophagogastric junction (EGJ) on real-time MRI and compare imaging parameters to EGJ morphology on high-resolution manometry (HRM). Methods A total of 105 of 117 eligible patients who underwent real-time MRI and high-resolution manometry for GERD-like symptoms between 2015 and 2018 at a single center were retrospectively evaluated (male n = 57; female n = 48; mean age 52.5 ± 15.4 years). Real-time MRI was performed at a median investigation time of 15 min (1 frame/40 ms). On HRM, EGJ morphology was assessed according to the Chicago classification of esophageal motility disorders. Real-time MRI was performed at 3 T using highly undersampled radial fast low-angle shot acquisitions with NLINV image reconstruction. A 10 mL pineapple juice bolus served as oral contrast agent at supine position. Real-time MRI films of the EGJ were acquired during swallowing events and during Valsalva maneuver. Anatomic and functional MRI parameters were compared to EGJ morphology on HRM. Results On HRM, n = 42 patients presented with EGJ type I (40.0%), n = 33 with EGJ type II (31.4%), and n = 30 with EGJ type III (28.6%). On real-time MRI, hiatal hernia was more common in patients with EGJ type III (66.7%) than in patients with EGJ type I (26.2%) and EGJ type II (30.3%; p < 0.001). Sliding hiatal hernia was more frequent in patients with EGJ type II (33.3%) than in patients with EGJ type III (16.7%) and EGJ type I (7.1%; p = 0.017). The mean esophagus–fundus angle of patients was 85 ± 31° at rest and increased to 101 ± 36° during Valsalva maneuver. Conclusion Real-time MRI is a non-invasive imaging method for assessment of the esophagogastric junction. Real-time MRI can visualize dynamic changes of the EGJ during swallowing events. Supplementary Information The online version contains supplementary material available at 10.1007/s11604-021-01210-9.
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Affiliation(s)
- Lorenz Biggemann
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany.
| | - Johannes Uhlig
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Nina Gliem
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Omar Al-Bourini
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Edris Wedi
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Volker Ellenrieder
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Michael Ghadimi
- Department of General, Visceral, and Paediatric Surgery, University Medical Center, Göttingen, Germany
| | - Martin Uecker
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Jens Frahm
- Biomedical NMR, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
| | - Joachim Lotz
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Ali Seif Amir Hosseini
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - Ulrike Streit
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
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8
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Voskuilen L, Schoormans J, Gurney-Champion OJ, Balm AJM, Strijkers GJ, Smeele LE, Nederveen AJ. Dynamic MRI of swallowing: real-time volumetric imaging at 12 frames per second at 3 T. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2021; 35:411-419. [PMID: 34779971 PMCID: PMC9188511 DOI: 10.1007/s10334-021-00973-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/10/2021] [Accepted: 10/18/2021] [Indexed: 11/25/2022]
Abstract
Objective Dysphagia or difficulty in swallowing is a potentially hazardous clinical problem that needs regular monitoring. Real-time 2D MRI of swallowing is a promising radiation-free alternative to the current clinical standard: videofluoroscopy. However, aspiration may be missed if it occurs outside this single imaged slice. We therefore aimed to image swallowing in 3D real time at 12 frames per second (fps). Materials and methods At 3 T, three 3D real-time MRI acquisition approaches were compared to the 2D acquisition: an aligned stack-of-stars (SOS), and a rotated SOS with a golden-angle increment and with a tiny golden-angle increment. The optimal 3D acquisition was determined by computer simulations and phantom scans. Subsequently, five healthy volunteers were scanned and swallowing parameters were measured. Results Although the rotated SOS approaches resulted in better image quality in simulations, in practice, the aligned SOS performed best due to the limited number of slices. The four swallowing phases could be distinguished in 3D real-time MRI, even though the spatial blurring was stronger than in 2D. The swallowing parameters were similar between 2 and 3D. Conclusion At a spatial resolution of 2-by-2-by-6 mm with seven slices, swallowing can be imaged in 3D real time at a frame rate of 12 fps. Supplementary Information The online version contains supplementary material available at 10.1007/s10334-021-00973-6.
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Affiliation(s)
- Luuk Voskuilen
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni van Leeuwenhoek, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands. .,Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands. .,Academic Centre for Dentistry Amsterdam and Academic Medical Center, University of Amsterdam and VU University Amsterdam, Amsterdam, The Netherlands.
| | - Jasper Schoormans
- Biomedical Engineering and Physics, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Oliver J Gurney-Champion
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Alfons J M Balm
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni van Leeuwenhoek, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.,Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.,Robotics and Mechatronics, faculty of EEMCS, TechMed Center, University of Twente, Enschede, The Netherlands
| | - Gustav J Strijkers
- Biomedical Engineering and Physics, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Ludi E Smeele
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni van Leeuwenhoek, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.,Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Aart J Nederveen
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
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9
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Real-time magnetic resonance imaging: mechanics of oral and facial function. Br J Oral Maxillofac Surg 2021; 60:596-603. [DOI: 10.1016/j.bjoms.2021.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 11/19/2022]
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10
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Wiltshire CEE, Chiew M, Chesters J, Healy MP, Watkins KE. Speech Movement Variability in People Who Stutter: A Vocal Tract Magnetic Resonance Imaging Study. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2021; 64:2438-2452. [PMID: 34157239 PMCID: PMC8323486 DOI: 10.1044/2021_jslhr-20-00507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 01/29/2021] [Accepted: 03/01/2021] [Indexed: 06/01/2023]
Abstract
Purpose People who stutter (PWS) have more unstable speech motor systems than people who are typically fluent (PWTF). Here, we used real-time magnetic resonance imaging (MRI) of the vocal tract to assess variability and duration of movements of different articulators in PWS and PWTF during fluent speech production. Method The vocal tracts of 28 adults with moderate to severe stuttering and 20 PWTF were scanned using MRI while repeating simple and complex pseudowords. Midsagittal images of the vocal tract from lips to larynx were reconstructed at 33.3 frames per second. For each participant, we measured the variability and duration of movements across multiple repetitions of the pseudowords in three selected articulators: the lips, tongue body, and velum. Results PWS showed significantly greater speech movement variability than PWTF during fluent repetitions of pseudowords. The group difference was most evident for measurements of lip aperture using these stimuli, as reported previously, but here, we report that movements of the tongue body and velum were also affected during the same utterances. Variability was not affected by phonological complexity. Speech movement variability was unrelated to stuttering severity within the PWS group. PWS also showed longer speech movement durations relative to PWTF for fluent repetitions of multisyllabic pseudowords, and this group difference was even more evident as complexity increased. Conclusions Using real-time MRI of the vocal tract, we found that PWS produced more variable movements than PWTF even during fluent productions of simple pseudowords. PWS also took longer to produce multisyllabic words relative to PWTF, particularly when words were more complex. This indicates general, trait-level differences in the control of the articulators between PWS and PWTF. Supplemental Material https://doi.org/10.23641/asha.14782092.
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Affiliation(s)
- Charlotte E. E. Wiltshire
- Wellcome Centre for Integrative Neuroimaging, Department of Experimental Psychology, Radcliffe Observatory Quarter, University of Oxford, United Kingdom
| | - Mark Chiew
- Wellcome Centre for Integrative Neuroimaging, Nuffield Department of Clinical Neurosciences, University of Oxford, United Kingdom
| | - Jennifer Chesters
- Wellcome Centre for Integrative Neuroimaging, Department of Experimental Psychology, Radcliffe Observatory Quarter, University of Oxford, United Kingdom
| | - Máiréad P. Healy
- Wellcome Centre for Integrative Neuroimaging, Department of Experimental Psychology, Radcliffe Observatory Quarter, University of Oxford, United Kingdom
| | - Kate E. Watkins
- Wellcome Centre for Integrative Neuroimaging, Department of Experimental Psychology, Radcliffe Observatory Quarter, University of Oxford, United Kingdom
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11
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3D-CT Evaluation of Swallowing: Metrics of the Swallowing Response Using Swallowing CT. Dysphagia 2021; 37:237-249. [PMID: 33818630 PMCID: PMC8948108 DOI: 10.1007/s00455-021-10288-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/16/2021] [Indexed: 10/28/2022]
Abstract
Videofluoroscopy and videoendoscopy dramatically changed the evaluation and management of swallowing disorders. Later advancements in techniques for the instrumental evaluation of swallowing were limited by technique and positioning. The advent of 320-row area detector CT solved previous challenges and allowed for the study of swallowing physiology and dysphagia in greater detail. In this summary, we describe the history and evolution of CT technology and describe research and clinical applications for the evaluation of swallowing physiology and pathophysiology.
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12
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Johnson M, Sreela LS, Mathew P, Prasad TS. Actual applications of magnetic resonance imaging in dentomaxillofacial region. Oral Radiol 2021; 38:17-28. [PMID: 33635492 DOI: 10.1007/s11282-021-00521-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 02/13/2021] [Indexed: 11/24/2022]
Abstract
Magnetic resonance imaging (MRI) is a versatile imaging modality utilized in various medical fields. Specifically used for evaluation of soft tissues, with non-ionizing radiation and multiplanar sections that has provided great guidance to diagnosis. Nowadays, use of MRI in dental practice is becoming more pervasive, especially for the evaluation of head-and-neck cancer, detection of salivary gland lesions, lymphadenopathy, and temporomandibular joint disorders. Understanding the basic principles, its recent advances, and multiple applications in dentomaxillofacial region helps significantly in the diagnostic decision making. In this article, the principle of MRI and its recent advances are reviewed, with further discussion on the appearance of various maxillofacial pathosis.
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Affiliation(s)
- Migi Johnson
- Department of Oral Medicine and Radiology, Government Dental College Kottayam, Gandhinagar, Kottayam, 686008, Kerala, India.
| | - L S Sreela
- Department of Oral Medicine and Radiology, Government Dental College Kottayam, Gandhinagar, Kottayam, 686008, Kerala, India
| | - Philips Mathew
- Department of Oral Medicine and Radiology, Government Dental College Kottayam, Gandhinagar, Kottayam, 686008, Kerala, India
| | - Twinkle S Prasad
- Department of Oral Medicine and Radiology, Government Dental College Kottayam, Gandhinagar, Kottayam, 686008, Kerala, India
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Biggemann L, Uhlig J, Gliem N, Al-Bourini O, Wedi E, Ellenrieder V, Ghadimi M, Uecker M, Frahm J, Lotz J, Hosseini ASA, Streit U. Assessment of esophageal motility disorders by real-time MRI. Eur J Radiol 2020; 132:109265. [PMID: 33010683 DOI: 10.1016/j.ejrad.2020.109265] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/08/2020] [Accepted: 08/10/2020] [Indexed: 12/25/2022]
Abstract
PURPOSE To investigate imaging findings of esophageal motility disorders on dynamic real-time. MATERIAL AND METHODS 102 patients with GERD-like symptoms were included in this retrospective study between 2015-2018. Dynamic real-time MRI visualized the transit of a 10 mL pineapple juice bolus through the esophagus and EGJ with a temporal resolution of 40 ms. Dynamic and anatomic parameters were measured by consensus reading. Imaging findings were compared to HRM utilizing the Chicago classification of esophageal motility disorders, v3.0. RESULTS All 102 patients completed real-time MRI in a median examination time of 15 min. On HRM, 14 patients presented with disorders with EGJ outlet obstruction (EGJOO) (13.7 %), 7 patients with major disorders of peristalsis (6.9 %), and 32 patients with minor disorders of peristalsis (31.4 %). HRM was normal in 49 patients (48.0 %). Incomplete bolus clearance was significantly more frequent in patients with esophageal motility disorders on HRM than in patients with normal HRM (p = 0.0002). In patients with motility disorders with EGJOO and major disorders of peristalsis, the esophageal diameter tended to be wider (23.6 ± 8.0 vs. 21.2 ± 3.5 mm, p = 0.089) and the sphincter length longer (19.7 ± 7.3 vs. 16.7 ± 3.0 mm, p = 0.091) compared to patients with normal HRM. 3/7 patients with achalasia type II were correctly identified by real-time MRI and one further achalasia type II patient was diagnosed with a motility disorder on MRI films. The other 3/7 patients presented no specific imaging features. CONCLUSION Real-time MRI is an auxiliary diagnostic tool for the assessment of swallowing events. Imaging parameters may assist in the detection of esophageal motility disorders.
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Affiliation(s)
- Lorenz Biggemann
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany.
| | - Johannes Uhlig
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany
| | - Nina Gliem
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Germany
| | - Omar Al-Bourini
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany
| | - Edris Wedi
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Germany
| | - Volker Ellenrieder
- Department of Gastroenterology and Gastrointestinal Oncology, University Medical Center Göttingen, Germany
| | - Michael Ghadimi
- Department of General, Visceral, and Paediatric Surgery, University Medical Center, Göttingen, Germany
| | - Martin Uecker
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany
| | - Jens Frahm
- Biomedical NMR, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
| | - Joachim Lotz
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany
| | - Ali Seif Amir Hosseini
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany
| | - Ulrike Streit
- Department of Diagnostic and Interventional Radiology, University Medical Center Göttingen, Germany
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Martin J, Ruthven M, Boubertakh R, Miquel ME. Realistic Dynamic Numerical Phantom for MRI of the Upper Vocal Tract. J Imaging 2020; 6:86. [PMID: 34460743 PMCID: PMC8320850 DOI: 10.3390/jimaging6090086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/08/2020] [Accepted: 08/24/2020] [Indexed: 11/16/2022] Open
Abstract
Dynamic and real-time MRI (rtMRI) of human speech is an active field of research, with interest from both the linguistics and clinical communities. At present, different research groups are investigating a range of rtMRI acquisition and reconstruction approaches to visualise the speech organs. Similar to other moving organs, it is difficult to create a physical phantom of the speech organs to optimise these approaches; therefore, the optimisation requires extensive scanner access and imaging of volunteers. As previously demonstrated in cardiac imaging, realistic numerical phantoms can be useful tools for optimising rtMRI approaches and reduce reliance on scanner access and imaging volunteers. However, currently, no such speech rtMRI phantom exists. In this work, a numerical phantom for optimising speech rtMRI approaches was developed and tested on different reconstruction schemes. The novel phantom comprised a dynamic image series and corresponding k-space data of a single mid-sagittal slice with a temporal resolution of 30 frames per second (fps). The phantom was developed based on images of a volunteer acquired at a frame rate of 10 fps. The creation of the numerical phantom involved the following steps: image acquisition, image enhancement, segmentation, mask optimisation, through-time and spatial interpolation and finally the derived k-space phantom. The phantom was used to: (1) test different k-space sampling schemes (Cartesian, radial and spiral); (2) create lower frame rate acquisitions by simulating segmented k-space acquisitions; (3) simulate parallel imaging reconstructions (SENSE and GRAPPA). This demonstrated how such a numerical phantom could be used to optimise images and test multiple sampling strategies without extensive scanner access.
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Affiliation(s)
- Joe Martin
- MR Physics, Guy’s and St Thomas’ NHS Foundation Trust, St Thomas’s Hospital, London SE1 7EH, UK;
| | - Matthieu Ruthven
- Clinical Physics, Barts Health NHS Trust, St Bartholomew’s Hospital, London EC1A 7BE, UK;
| | - Redha Boubertakh
- Singapore Bioimaging Consortium (SBIC), Singapore 138667, Singapore;
| | - Marc E. Miquel
- Clinical Physics, Barts Health NHS Trust, St Bartholomew’s Hospital, London EC1A 7BE, UK;
- Centre for Advanced Cardiovascular Imaging, NIHR Barts Biomedical Research Centre (BRC), William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK
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Tanaka T, Tanaka R, Yeung AWK, Bornstein MM, Nishimura S, Oda M, Habu M, Takahashi O, Yoshiga D, Sago T, Miyamoto I, Kodama M, Wakasugi-Sato N, Matsumoto-Takeda S, Joujima T, Miyamura Y, Morimoto Y. Real-time evaluation of swallowing in patients with oral cancers by using cine-magnetic resonance imaging based on T2-weighted sequences. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:583-592. [PMID: 32622798 DOI: 10.1016/j.oooo.2020.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 05/11/2020] [Accepted: 05/16/2020] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate whether a new cine-magnetic resonance imaging (CMRI) technique might be useful for evaluating swallowing function in patients with different types of oral cancers by assessing 12 CMRI-related parameters. STUDY DESIGN In total, 111 patients with oral cancers were evaluated. We examined whether visualization of fluid flow and determination of flow direction to the trachea or the esophagus were possible with CMRI. We evaluated the correlations between CMRI-related parameters and self-reported dysphagia scores as the status of dysphagia, T classification groups as tumor staging for preoperative patients, alterations in CMRI-related parameters between pre- and postoperative patients, and the degree of invasiveness of oral cancer surgery. RESULTS We could judge the flow direction to the esophagus on CMRI in all 111 patients. Six CMRI-related parameters showed significant correlations with dysphagia status. Increases in CMRI-related parameters were significantly related to deterioration of swallowing status, as shown by a decrease in self-reported dysphagia scores, advances in the T classification, and degree of invasiveness of oral cancer surgery. CONCLUSIONS The results of the present study suggest that CMRI can be used to directly visualize swallowing dynamics and objectively evaluate the swallowing complaints of patients with oral cancer.
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Affiliation(s)
- Tatsurou Tanaka
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan; Oral and Maxillofacial Radiology, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Ray Tanaka
- Oral and Maxillofacial Radiology, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Andy Wai Kan Yeung
- Oral and Maxillofacial Radiology, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Michael M Bornstein
- Oral and Maxillofacial Radiology, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Department of Oral Health & Medicine, University Center of Dental Medicine Basel, Basel, Switzerland
| | - Shun Nishimura
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Masafumi Oda
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Manabu Habu
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Osamu Takahashi
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Daigo Yoshiga
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Teppei Sago
- Division of Dental Anesthesiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Ikuya Miyamoto
- Department of Reconstructive Oral and Maxillofacial Surgery, Iwate Medical University, Morioka, Iwate, Japan
| | - Masaaki Kodama
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Fukuoka, Japan; Department of Oral and Maxillofacial Surgery, Japan Seafarers Relief Association, Moji Ekisaikai Hospital, Kitakyushu, Fukuoka, Japan
| | - Nao Wakasugi-Sato
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Shinobu Matsumoto-Takeda
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Takaaki Joujima
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Yuichi Miyamura
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Yasuhiro Morimoto
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Fukuoka, Japan.
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Dynamic Fast Imaging Employing Steady State Acquisition Magnetic Resonance Imaging of the Vocal Tract in One Overtone Male Singer: Our Preliminary Experience. J Voice 2020; 36:170-175. [PMID: 32600871 DOI: 10.1016/j.jvoice.2020.05.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/14/2020] [Accepted: 05/26/2020] [Indexed: 11/22/2022]
Abstract
AIMS To demonstrate physiological changing of vocal tract's structures during overtone singing with commercial magnetic resonance imaging (MRI) Fast Imaging Employing Steady State Acquisition (FIESTA) dynamic sequence. METHODS AND MATERIALS A 1.5 T MRI with a 16 channel head-and-neck coil and a FIESTA sequence were used. A temporal resolution of 0.155 sec (7 image/s). A single professional singer was studied. The MR acquisition is made while the singer performed a predetermined singing sequence. Three different overtone singing techniques were examined (L-technique, J-technique, and NG technique) and one effect (Ezengileer) applied to L-technique. For each overtone technique we evaluated MRI movement of lips, tongue, velopharyngeal closure, and relationship among tongue and pharyngeal posterior wall/soft palate. To cancel the noise over-imposed, the dynamic MRI was subsequently dubbed in studio with the audio of the preset overtone sing. Dubbed MR images were analyzed with an Overtone Analyzer Software and different sound frequencies were identified and pointed out as colored lines. RESULTS This study shows that different overtone techniques are related to a specific conformation of tongue, lips, soft and hard palate and motion's relation changing between them. Only a correct conformation of vocal tract's structure allows resonance and so to hear desired fundamental and harmonic pitch in overtone singing. CONCLUSION The preliminary data of our study demonstrates that FIESTA dynamic MRI sequence can be used to depict changing of position of vocal tract's structure in overtone singing techniques with a good temporal and anatomic resolution.
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Mills N, Lydon A, Davies‐Payne D, Keesing M, Geddes DT, Mirjalili SA. Imaging the breastfeeding swallow: Pilot study utilizing real-time MRI. Laryngoscope Investig Otolaryngol 2020; 5:572-579. [PMID: 32596502 PMCID: PMC7314469 DOI: 10.1002/lio2.397] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/20/2020] [Accepted: 04/29/2020] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE Knowledge of the breastfeeding swallow is limited by practical challenges. Radiation exposure to both mother and infant and the radiolucent properties of breastmilk make videofluoroscopy an unsuitable imaging modality. Furthermore, ultrasound is not ideal for capturing the complex 3-dimensional functional anatomy of swallowing. In this study we explore the feasibility of using real-time MRI to capture the breastfeeding swallow. METHODS Prospective observational study: Review of imaging from 12 normal infants (<5 months of age) and their mothers while breastfeeding using real-time MRI. RESULTS Static images were successfully captured in 11 infants and dynamic images in nine infants. This imaging modality confirms the dorsal surface of the infant's tongue elevates the maternal nipple to the hard palate, closing the space around the nipple with no air visible in the oral cavity during sucking and swallowing. We obtained dynamic imaging of mandibular movement with sucking, palatal elevation and pharyngeal constriction with swallowing, diaphragm movement with breathing and milk entering the stomach. Breastmilk was easily visualized, being high intensity on T2 sequences. Technical challenges were encountered secondary to infant movement and difficulties acquiring and maintaining midsagittal orientation. The similarity in tissue densities of the lips, tongue, nipple and hard palate limited definition between these structures. CONCLUSION Real-time MRI imaging was successful in capturing dynamic images of the breastfeeding swallow. However, technical and practical challenges make real-time MRI unlikely at present to be suitable for swallow assessment in clinical practice. Advances in technology and expertise in dynamic image capture may improve the feasibility of using MRI to understand and assess the breastfeeding swallow in the near future. LEVEL OF EVIDENCE 4.
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Affiliation(s)
- Nikki Mills
- Paediatric Otolaryngology DepartmentStarship Children's HospitalAucklandNew Zealand
- Department of Anatomy and Medical Imaging, Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand
| | - Anna‐Maria Lydon
- Centre for Advanced MRI, Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand
| | - David Davies‐Payne
- Paediatric Radiology DepartmentStarship Children's HospitalAucklandNew Zealand
| | - Melissa Keesing
- Paediatric Speech‐language Therapy DepartmentStarship Children's HospitalAucklandNew Zealand
| | - Donna T Geddes
- School of Molecular Sciences, Faculty of ScienceUniversity of Western AustraliaCrawleyWAAustralia
| | - Seyed Ali Mirjalili
- Department of Anatomy and Medical Imaging, Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand
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Voskuilen L, de Heer P, van der Molen L, Balm AJM, van der Heijden F, Strijkers GJ, Smeele LE, Nederveen AJ. A 12-channel flexible receiver coil for accelerated tongue imaging. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2020; 33:581-590. [PMID: 31950389 PMCID: PMC7351800 DOI: 10.1007/s10334-019-00824-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/28/2019] [Accepted: 12/23/2019] [Indexed: 12/15/2022]
Abstract
Objective MRI of the tongue requires acceleration to minimise motion artefacts and to facilitate real-time imaging of swallowing. To accelerate tongue MRI, we designed a dedicated flexible receiver coil. Materials and methods We designed a flexible 12-channel receiver coil for tongue MRI at 3T and compared it to a conventional head-and-neck coil regarding SNR and g-factor. Furthermore, two accelerated imaging techniques were evaluated using both coils: multiband (MB) diffusion-tensor imaging (DTI) and real-time MRI of swallowing. Results The flexible coil had significantly higher SNR in the anterior (2.1 times higher, P = 0.002) and posterior (2.0 times higher, P < 0.001) parts of the tongue, while the g-factor was lower at higher acceleration. Unlike for the flexible coil, the apparent diffusion coefficient (P = 0.001) and fractional anisotropy (P = 0.008) deteriorated significantly while using the conventional coil after accelerating DTI with MB. The image quality of real-time MRI of swallowing was significantly better for hyoid elevation (P = 0.029) using the flexible coil. Conclusion Facilitated by higher SNR and lower g-factor values, our flexible tongue coil allows faster imaging, which was successfully demonstrated in MB DTI and real-time MRI of swallowing. Electronic supplementary material The online version of this article (10.1007/s10334-019-00824-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Luuk Voskuilen
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni Van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands. .,Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands. .,Department of Oral and Maxillofacial Surgery, Academic Centre for Dentistry Amsterdam and Academic Medical Center, University of Amsterdam and VU University Amsterdam, Amsterdam, Netherlands.
| | - Paul de Heer
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Lisette van der Molen
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni Van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
| | - Alfons J M Balm
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni Van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.,Department of Oral and Maxillofacial Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.,Department of Robotics and Mechatronics, MIRA Institute, University of Twente, Enschede, Netherlands
| | - Ferdinand van der Heijden
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni Van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.,Department of Robotics and Mechatronics, MIRA Institute, University of Twente, Enschede, Netherlands
| | - Gustav J Strijkers
- Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Ludi E Smeele
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute, Antoni Van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.,Department of Oral and Maxillofacial Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Aart J Nederveen
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
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Joujima T, Oda M, Sasaguri M, Habu M, Kataoka S, Miyamura Y, Wakasugi-Sato N, Matsumoto-Takeda S, Takahashi O, Kokuryo S, Sago T, Yoshiga D, Tanaka T, Morimoto Y. Evaluation of velopharyngeal function using high-speed cine-magnetic resonance imaging based on T2-weighted sequences: a preliminary study. Int J Oral Maxillofac Surg 2019; 49:432-441. [PMID: 31451304 DOI: 10.1016/j.ijom.2019.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/06/2019] [Accepted: 08/07/2019] [Indexed: 10/26/2022]
Abstract
The objective was to introduce a new technique for visualizing the three-dimensional (3D) movements of velopharyngeal-related muscles using high-speed cine-magnetic resonance imaging (MRI) based on T2-weighted sequences. The evaluation of phonation- and water swallowing-related events was performed in 11 healthy subjects. Specifically, whether cine-MRI could precisely visualize normal velopharyngeal function during these two events was examined. The 3D movements of the soft palate, superior pharyngeal constrictor muscles, and levator veli palatini muscles were visualized in all 11 subjects. A noteworthy finding was that the magnetic resonance signals of the superior constrictor pharyngeal muscles and the levator veli palatini muscles were significantly higher during phonation and during water swallowing than at rest. This initial study suggests that the 3D movements of velopharyngeal-related muscles can be successfully and precisely visualized without side effects. The magnetic resonance signal changes seen in the superior pharyngeal constrictor and levator veli palatini muscles using the technique described here should be useful to develop better methods of evaluation of velopharyngeal function.
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Affiliation(s)
- T Joujima
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - M Oda
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - M Sasaguri
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - M Habu
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - S Kataoka
- Division of Anatomy, Kyushu Dental University, Kitakyushu, Japan
| | - Y Miyamura
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - N Wakasugi-Sato
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - S Matsumoto-Takeda
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - O Takahashi
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - S Kokuryo
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Japan
| | - T Sago
- Division of Dental Anaesthesiology, Kyushu Dental University, Kitakyushu, Japan
| | - D Yoshiga
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Japan
| | - T Tanaka
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Y Morimoto
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan.
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Lin CC, Zhang S, Hsu CY, Frahm J, Lu TW, Shih TF. Measuring three-dimensional tibiofemoral kinematics using dual-slice real-time magnetic resonance imaging. Med Phys 2019; 46:4588-4599. [PMID: 31408532 DOI: 10.1002/mp.13761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 07/20/2019] [Accepted: 08/07/2019] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The purpose of this study is to propose and evaluate a slice-to-volume registration (SVR) method integrating an advanced dual-slice real-time magnetic resonance image (MRI) and three-dimensional (3D) MRI volume of the tibiofemoral joint for determining their 3D kinematics. METHODS The real-time and 3D MRI of the knee were collected from 12 healthy adults at 5 static flexion positions and during dynamic flexion/extension movement. The 3D positions and orientations of the femur and tibia were obtained by registering their volumetric models constructed from the 3D MRI to dual-slice real-time MRI using an optimization process. The proposed method was quantitatively evaluated for its performance in terms of the robustness and measurement accuracy, and compared to those of a single-slice SVR method. Its repeatability in measuring knee kinematics during flexion/extension movement was also determined. RESULTS In comparison to the single-slice SVR method, the dual-slice method was significantly superior, giving a successful registration rate > 95%, a bias less than 0.5 mm in translations and 0.6° in rotations and a precision <0.7 mm in translations and 0.9° in rotations for determining the 3D tibiofemoral poses. For repeatability of the dual-slice SVR in measuring tibiofemoral kinematics during dynamic flexion/extension, the means of the time-averaged standard deviations were <0.9° for joint angles and 0.5 mm for joint translations. CONCLUSION A dual-slice SVR method in conjunction with real-time MRI has been developed and evaluated for its performance in measuring 3D kinematics of the tibiofemoral joint in 12 young adults in terms of the accuracy, robustness, and repeatability. The proposed MRI-based 3D measurement method provides a noninvasive and ionizing radiation-free approach for 3D kinematic measurement of the tibiofemoral joint, which will be helpful for future academic and clinical applications.
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Affiliation(s)
- Cheng-Chung Lin
- Department of Electrical Engineering, Fu Jen Catholic University, New Taipei City, 24205, Taiwan
| | - Shuo Zhang
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institute für biophysikalische Chemie, Am Fassberg 11, 37070, Göttingen, Germany
| | - Chao-Yu Hsu
- Department of Radiology, Taipei Hospital, Ministry of Health and Welfare, New Taipei City, 10051, Taiwan
| | - Jens Frahm
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institute für biophysikalische Chemie, Am Fassberg 11, 37070, Göttingen, Germany
| | - Tung-Wu Lu
- Department of Biomedical Engineering, National Taiwan University, Taipei, 10051, Taiwan.,Department of Orthopaedic Surgery, College of Medicine, National Taiwan University, Taipei, 10051, Taiwan
| | - Ting-Fang Shih
- Department of Radiology, College of Medicine, National Taiwan University, Taipei, 10051, Taiwan.,Department of Medical Imaging, National Taiwan University Hospital, Taipei, 10051, Taiwan
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Iltis PW, Heyne M, Frahm J, Voit D, Joseph A, Atlas L. Simultaneous dual-plane, real-time magnetic resonance imaging of oral cavity movements in advanced trombone players. Quant Imaging Med Surg 2019; 9:976-984. [PMID: 31367552 DOI: 10.21037/qims.2019.05.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Background This paper describes the use of real-time magnetic resonance imaging to simultaneously obtain magnetic resonance imaging (MRI) videos in both a sagittal and coronal plane during the performance of a musical exercise in five advanced trombone players. Methods Dual-slice recordings were implemented in a frame-interleaved manner with 20 ms acquisitions per frame to achieve two interleaved videos at a rate of 25 frames per second. A customized MATLAB toolkit was used for the extraction of line profiles from MRI videos to quantify tongue movements associated with exercise performance from both perspectives. Results Across all subjects, the analyses revealed precise coupling of vertical movements of the dorsal tongue surface (DTS), viewed from a sagittal perspective, with reduction in the vertical and horizontal dimensions of the air channel formed between the DTS and the hard palate, viewed from a coronal perspective. The cross-correlation between these movements was very strong (mean R=0.967). Conclusions These results demonstrate the unique utility of this dual-slice technology in describing the coordination of complex tongue movements occurring in two planes (i.e., three directions) simultaneously, lending a deeper understanding of lingual motor control during trombone performance.
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Affiliation(s)
- Peter W Iltis
- Department of Kinesiology, Gordon College, Wenham, MA, USA
| | - Matthias Heyne
- College of Health & Rehabilitation Sciences: Sargent College, Boston University, Boston, MA, USA
| | - Jens Frahm
- MRI Research Group, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
| | - Dirk Voit
- MRI Research Group, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
| | - Arun Joseph
- MRI Research Group, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
| | - Lian Atlas
- Department of Kinesiology, Gordon College, Wenham, MA, USA
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Burke CJ, Walter WR, Gyftopoulos S, Pham H, Baron S, Gonzalez-Lomas G, Vigdorchik JM, Youm T. Real-Time Assessment of Femoroacetabular Motion Using Radial Gradient Echo Magnetic Resonance Arthrography at 3 Tesla in Routine Clinical Practice: A Pilot Study. Arthroscopy 2019; 35:2366-2374. [PMID: 31395172 DOI: 10.1016/j.arthro.2019.02.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/22/2019] [Accepted: 02/28/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare femoroacetabular motion in a series of consecutive symptomatic patients with hip pain throughout the range of motion of the hip using a real-time radial gradient echo (GRE) sequence in addition to the routine hip protocol sequences for magnetic resonance (MR) arthrographic assessment of patients with and without clinical femoroacetabular impingement (FAI) syndrome. In particular, we sought to assess whether the additional dynamic sequence could differentiate between patients with and without a positive physical exam maneuver for FAI syndrome. METHODS Patients with hip pain referred for conventional hip MR arthrogram including those with and without a positive physical exam maneuver for FAI syndrome were imaged using routine hip MR arthrogram protocol and an additional real-time radial 2-dimensional GRE acquisition at 3 Tesla in an axial oblique plane with continuous scanning of a 9 mm thick slice through the center of the femoral head-neck axis. Patients who were unable to move through the range of motion were excluded (n = 3). Patients with acetabular dysplasia (defined by a lateral center-edge angle [CEA] of 20°) were also excluded, as were patients had Kellgren and Lawrence scores of > 0. The real-time cine sequence was acquired with the patient actively moving through neutral, flexion, flexion-abduction external-rotation, and flexion-adduction internal rotation (FADIR) positions aiming for 40° of abduction, then 25° of adduction at 80° to 90° flexion. Due to the placement of the coil over the hip, a true FADIR was precluded. Images were evaluated independently by 2 musculoskeletal radiologists measuring the joint space in the anterior, central, and posterior positions at each point during range of motion for femoroacetabular cortical space (FACS). Anterior FACS narrowing was calculated as the ratio of joint space in FADIR:neutral position, with lower ratios indicating greater narrowing. Static metrics including alpha angle, CEA, grade of cartilage loss according the Outerbridge classification, and patient demographics were also recorded. RESULTS Twenty-two painful hips in 22 patients (11 males and 11 females) with mean age 36 years (range, 15-67) were included. Twelve patients had a positive physical exam maneuver for FAI syndrome. The time to perform the dynamic sequence was 3 to 6 minutes. Interobserver agreement was strong, with intraclass correlation 0.91 and concordance correlation 0.90. According to results from both readers, patients with impingement on clinical exam had significantly lower anterior FACS ratios compared with those without clinical impingement (reader 1: 0.39 ± 0.10 vs 0.69 ± 0.20, P = .001; reader 2: 0.36 ± 0.07 vs 0.70 ± 0.17, P < .001). Decreased anterior FACS ratio was found to be significantly correlated to increased alpha angle by both readers (reader 1: R = -0.63, P = .002; reader 2: R = -0.67, P = .001) but not significantly correlated to CEA (reader 1: R = 0.13, P = .561; reader 2: R = 0.20, P = .378) or cartilage loss (reader 1: R = 0.03, P = .885; reader 2: R = -0.06, P = .784). Both readers found patients with an anterior FACS ratio of 1/2 to have significantly higher mean alpha angle (reader 1: 62.88 vs 52.79, P = .038; reader 2: 63.50 vs 50.58, P = .006); however, there were no significant differences in cartilage loss (reader 1: P = .133; reader 2: P = .882) or CEA (reader 1: P = .340; reader 2: P = .307). CONCLUSIONS A dynamic radial 2-dimensional-GRE sequence can be added to standard hip MR arthrogram protocols in <6 minutes, allowing assessment of dynamic femoroacetabular motion with strong interreader agreement. Patients with impingement on clinical exam had significantly lower anterior FACS ratios between FADIR and neutral positions, compared with those without clinical impingement. LEVEL OF EVIDENCE Level III, comparative diagnostic investigation.
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Affiliation(s)
- Christopher J Burke
- Department of Radiology, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A..
| | - William R Walter
- Department of Radiology, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A
| | - Soterios Gyftopoulos
- Department of Radiology, Division of Musculoskeletal Radiology, Center for Musculoskeletal Care, NYU Langone Medical Center, New York, New York, U.S.A
| | - Hien Pham
- Department of Orthopaedic Surgery, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A
| | - Samuel Baron
- Department of Orthopaedic Surgery, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A
| | - Guillem Gonzalez-Lomas
- Department of Orthopaedic Surgery, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A
| | - Jonathan M Vigdorchik
- Department of Orthopaedic Surgery, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A
| | - Thomas Youm
- Department of Orthopaedic Surgery, NYU Langone Health, Langone Orthopedic Hospital, New York, New York, U.S.A
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24
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A review of the approaches to predict the ease of swallowing and post-swallow residues. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.02.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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25
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Kim YC. Fast upper airway magnetic resonance imaging for assessment of speech production and sleep apnea. PRECISION AND FUTURE MEDICINE 2018. [DOI: 10.23838/pfm.2018.00100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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26
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Faletti R, Gatti M, Di Chio A, Fronda M, Anselmino M, Ferraris F, Gaita F, Fonio P. Concentrated pineapple juice for visualisation of the oesophagus during magnetic resonance angiography before atrial fibrillation radiofrequency catheter ablation. Eur Radiol Exp 2018; 2:39. [PMID: 30460417 PMCID: PMC6246758 DOI: 10.1186/s41747-018-0067-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 10/09/2018] [Indexed: 11/10/2022] Open
Abstract
The purpose of this study was to compare in vitro pineapple juice and a solution of concentrated pineapple juice with a paramagnetic contrast agent in order to determine the feasibility of using the solution of concentrated pineapple juice in vivo for oesophagus visualisation at magnetic resonance angiography (MRA) before the radiofrequency catheter ablation procedure for atrial fibrillation. The pineapple juice was concentrated by a microwave heating evaporation process performed in a domestic microwave oven. Five grams of modified potato starch for every 40 mL of concentrated pineapple juice were added to the concentrated pineapple juice in order to thicken the solution. The solution resulted visually and quantitatively as hyperintense as the contrast agent in vitro (ratio = 1.02). in vivo, no technical difficulties were encountered during the MRA acquisition and a complete enhanced oesophagus was obtained in 37/38 patients (97.4%). The volumetric analysis and the three-dimensional reconstruction were feasible; the quality was rated as diagnostic in every patient. The intensified oesophagus was successfully merged into the electro-anatomical maps in all the patients. In summary, we demonstrated that this technique allows a feasible and safe oesophagus visualisation during MRA.
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Affiliation(s)
- Riccardo Faletti
- Radiology Unit, Department of Surgical Sciences, University of Turin, Via Genova 3, 10126, Turin, Italy
| | - Marco Gatti
- Radiology Unit, Department of Surgical Sciences, University of Turin, Via Genova 3, 10126, Turin, Italy.
| | - Andrea Di Chio
- Radiology Unit, Department of Surgical Sciences, University of Turin, Via Genova 3, 10126, Turin, Italy
| | - Marco Fronda
- Radiology Unit, Department of Surgical Sciences, University of Turin, Via Genova 3, 10126, Turin, Italy
| | - Matteo Anselmino
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, University of Turin, Turin, Italy
| | - Federico Ferraris
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, University of Turin, Turin, Italy
| | - Fiorenzo Gaita
- Division of Cardiology, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, University of Turin, Turin, Italy
| | - Paolo Fonio
- Radiology Unit, Department of Surgical Sciences, University of Turin, Via Genova 3, 10126, Turin, Italy
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Ekprachayakoon I, Miyamoto JJ, Inoue-Arai MS, Honda EI, Takada JI, Kurabayashi T, Moriyama K. New application of dynamic magnetic resonance imaging for the assessment of deglutitive tongue movement. Prog Orthod 2018; 19:45. [PMID: 30417234 PMCID: PMC6230546 DOI: 10.1186/s40510-018-0245-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 10/10/2018] [Indexed: 01/26/2023] Open
Abstract
Background Deglutitive motion of the tongue may function to maintain tooth position. However, the causation between abnormal patterns of orofacial muscle function and dental malocclusion remains unclear. To clarify the pathogenic mechanism of malocclusion, it is important to determine the relative positional relationship between the tongue tip and incisor edge or the dorsal tongue and palate during deglutition. Here, we assessed the utility of 3-T segmented cine-magnetic resonance (MR) imaging, combined with static MR images for hard tissue visualization, in assessing the relationship between the tongue and the surrounding tissues during deglutitive tongue movement. Methods Cine-MR images were acquired from three healthy female volunteers during deglutition who had no history of swallowing disorder or other chronic illness, normal alignment and occlusion, and a skeletal class I relationship. Three cine-MR images were taken during deglutition in accordance with an auditory cue for each volunteer. During static imaging, custom-made, contrast-medium-filled clear retainers were positioned in the mouth to allow visualization of the upper and lower incisors and hard palate boundaries. Static images were superimposed onto images of the three stages in deglutitive tongue movement, which were selected from a series of cine-MR images. These superimpositions were assessed five times by tracing cephalometric parameters to examine the reproducibility of the method. Results Traces varied little across repeated measurements, and all subjects had a similar pattern of dorsal tongue movement. Tongue-to-palate contact increased slightly during the first to second stage of swallowing and abruptly increased during the second to third stage, while the tongue tip position remained constant. Conclusions Segmented cine-MR imaging combined with static MR images is useful for assessing soft tissue motion during deglutition. This method is particularly useful in dentistry to evaluate the relationship between tongue function and maxillofacial morphology in terms of orthodontic treatment and orofacial myofunctional therapy, and for improving tongue movement during speech therapy. Electronic supplementary material The online version of this article (10.1186/s40510-018-0245-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Issareeya Ekprachayakoon
- Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.,Chulalongkorn University-Tokyo Medical and Dental University Research and Education Collaboration Center, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Jun J Miyamoto
- Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.
| | - Maristela Sayuri Inoue-Arai
- Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Ei-Ichi Honda
- Oral and Maxillofacial Radiology, Tokushima University Graduate School, 3-17-15, Kuramoto-cho, Tokushima, 770-8504, Japan.,Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Jun-Ichi Takada
- Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Tohru Kurabayashi
- Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Keiji Moriyama
- Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
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Ramanarayanan V, Tilsen S, Proctor M, Töger J, Goldstein L, Nayak KS, Narayanan S. Analysis of speech production real-time MRI. COMPUT SPEECH LANG 2018. [DOI: 10.1016/j.csl.2018.04.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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29
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Fluorescence lymphangiography-guided full-thickness oncologic gastric resection. Surg Endosc 2018; 33:620-632. [DOI: 10.1007/s00464-018-6402-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 08/20/2018] [Indexed: 02/06/2023]
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30
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Non-invasive quantification of human swallowing using a simple motion tracking system. Sci Rep 2018; 8:5095. [PMID: 29572522 PMCID: PMC5865167 DOI: 10.1038/s41598-018-23486-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 03/06/2018] [Indexed: 11/21/2022] Open
Abstract
The number of patients with dysphagia is rapidly increasing due to the ageing of the population. Therefore, the importance of objectively assessing swallowing function has received increasing attention. Videofluoroscopy and videoendoscopy are the standard clinical examinations for dysphagia, but these techniques are not suitable for daily use because of their invasiveness. Here, we aimed to develop a novel, non-invasive method for measuring swallowing function using a motion tracking system, the Kinect v2 sensor. Five males and five females with normal swallowing function participated in this study. We defined three mouth-related parameters and two larynx-related parameters and recorded data from 2.5 seconds before to 2.5 seconds after swallowing onset. Changes in mouth-related parameters were observed before swallowing and reached peak values at the time of swallowing. In contrast, larynx-related parameters showed little change before swallowing and reached peak values immediately after swallowing. This simple swallow tracking system (SSTS) successfully quantified the swallowing process from the oral phase to the laryngeal phase. This SSTS is non-invasive, wireless, easy to set up, and simultaneously measures the dynamics of swallowing from the mouth to the larynx. We propose the SSTS for use as a novel and non-invasive swallowing assessment tool in the clinic.
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Feng X, Blemker SS, Inouye J, Pelland CM, Zhao L, Meyer CH. Assessment of velopharyngeal function with dual-planar high-resolution real-time spiral dynamic MRI. Magn Reson Med 2018; 80:1467-1474. [PMID: 29508458 DOI: 10.1002/mrm.27139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 02/05/2023]
Abstract
PURPOSE To develop a real-time dynamic MRI method for comprehensive evaluation of velum movement during speech. METHODS Dynamic MRI has been used to study velopharyngeal insufficiency (VPI) by imaging the movement of the velum during speech, because it can provide good anatomic details with no exposed radiation. To be able to comprehensively evaluate dynamic velum movement, a real-time spiral non-balanced SSFP sequence was developed with simultaneous dual-planar coverage and improved spatial and temporal resolution using a combination of parallel imaging and spatial and temporal compressed sensing to achieve 6 × acceleration. New off-resonance correction and post-processing methods were also developed to reduce blurring and slice crosstalk. RESULTS The method demonstrated good image quality for visualizing dynamic velum movement with reduced blurring and improved image homogeneity. Spatial resolution of 1.2*1.2 mm2 with 150 mm FOV and temporal resolution of 20 frames-per-second with simultaneous dual-planar coverage was achieved. CONCLUSIONS This work describes a new technique for studying speech disorders using dual-planar accelerated spiral dynamic MRI.
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Affiliation(s)
- Xue Feng
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Silvia S Blemker
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA.,Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Josh Inouye
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Catherine M Pelland
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Li Zhao
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Craig H Meyer
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA.,Department of Radiology, University of Virginia, Charlottesville, Virginia, USA
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Burke CJ, Kaplan D, Block T, Chang G, Jazrawi L, Campbell K, Alaia M. Clinical Utility of Continuous Radial Magnetic Resonance Imaging Acquisition at 3 T in Real-time Patellofemoral Kinematic Assessment: A Feasibility Study. Arthroscopy 2018; 34:726-733. [PMID: 29273250 PMCID: PMC6080599 DOI: 10.1016/j.arthro.2017.09.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare patellar instability with magnetic resonance imaging analysis using continuous real-time radial gradient-echo (GRE) imaging in the assessment of symptomatic patients and asymptomatic subjects. METHODS Symptomatic patients with suspected patellofemoral maltracking and asymptomatic volunteers were scanned in real time by a radial 2-dimensional GRE sequence at 3 T in axial orientation at the patella level through a range of flexion-extension. The degree of lateral maltracking, as well as the associated tibial tubercle-trochlear groove distance and trochlea depth, was measured. Patellar lateralization was categorized as normal (≤2 mm), mild (>2 to ≤5 mm), moderate (>5 to ≤10 mm), or severe (>10 mm). The patellofemoral cartilage was also assessed according to the modified Outerbridge grading system. RESULTS The study included 20 symptomatic patients (13 women and 7 men; mean age, 36 ± 12.8 years) and 10 asymptomatic subjects (3 women and 7 men; mean age, 33.1 years). The mean time to perform the dynamic component ranged from 3 to 7 minutes. Lateralization in the symptomatic group was normal in 10 patients, mild in 1, moderate in 8, and severe in 1. There was no lateral tracking greater than 3 mm in the volunteer group. Lateral maltracking was significantly higher in symptomatic patients than in asymptomatic subjects (4.4 ± 3.7 mm vs 1.5 ± 0.71 mm, P = .007). Lateral tracking significantly correlated with tibial tubercle-trochlear groove distance (r = 0.48, P = .006). There was excellent agreement on lateral tracking between the 2 reviewers (intraclass correlation coefficient, 0.979; 95% confidence interval, 0.956-0.990). CONCLUSIONS The inclusion of a dynamic radial 2-dimensional GRE sequence is a rapid and easily performed addition to the standard magnetic resonance imaging protocol and allows dynamic quantitative assessment of patellar instability and lateral maltracking in symptomatic patients. With a paucity of reported data using this technique confirming that these results reach clinical significance, future work is required to determine how much lateral tracking is clinically significant. LEVEL OF EVIDENCE Level III, case control.
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Affiliation(s)
- Christopher J Burke
- Department of Radiology, NYU Hospital for Joint Diseases, New York, New York, U.S.A..
| | - Daniel Kaplan
- Department of Orthopedic Surgery, NYU Hospital for Joint Diseases, New York, New York, U.S.A
| | - Tobias Block
- NYU Center for Biomedical Imaging, New York, New York, U.S.A
| | - Gregory Chang
- NYU Center for Biomedical Imaging, New York, New York, U.S.A
| | - Laith Jazrawi
- Department of Orthopedic Surgery, NYU Hospital for Joint Diseases, New York, New York, U.S.A
| | - Kirk Campbell
- Department of Orthopedic Surgery, NYU Hospital for Joint Diseases, New York, New York, U.S.A
| | - Michael Alaia
- Department of Orthopedic Surgery, NYU Hospital for Joint Diseases, New York, New York, U.S.A
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Zhu M, Yu B, Yang W, Jiang Y, Lu L, Huang Z, Chen S, Li G. Evaluation of normal swallowing functions by using dynamic high-density surface electromyography maps. Biomed Eng Online 2017; 16:133. [PMID: 29157238 PMCID: PMC5696778 DOI: 10.1186/s12938-017-0424-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 11/11/2017] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Swallowing is a continuous process with substantive interdependencies among different muscles, and it plays a significant role in our daily life. The aim of this study was to propose a novel technique based on high-density surface electromyography (HD sEMG) for the evaluation of normal swallowing functions. METHODS A total of 96 electrodes were placed on the front neck to acquire myoelectric signals from 12 healthy subjects while they were performing different swallowing tasks. HD sEMG energy maps were constructed based on the root mean square values to visualize muscular activities during swallowing. The effects of different volumes, viscosities, and head postures on the normal swallowing process were systemically investigated by using the energy maps. RESULTS The results showed that the HD sEMG energy maps could provide detailed spatial and temporal properties of the muscle electrical activity, and visualize the muscle contractions that closely related to the swallowing function. The energy maps also showed that the swallowing time and effort was also explicitly affected by the volume and viscosity of the bolus. The concentration of the muscular activities shifted to the opposite side when the subjects turned their head to either side. CONCLUSIONS The proposed method could provide an alternative method to physiologically evaluate the dynamic characteristics of normal swallowing and had the advantage of providing a full picture of how different muscle activities cooperate in time and location. The findings from this study suggested that the HD sEMG technique might be a useful tool for fast screening and objective assessment of swallowing disorders or dysphagia.
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Affiliation(s)
- Mingxing Zhu
- Chinese Academy of Science (CAS) Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Shenzhen, 518055, China
| | - Bin Yu
- Designed Intelligence Group, Industrial Design Department, Eindhoven University of Technology, 5612 AZ, Eindhoven, The Netherlands
| | - Wanzhang Yang
- The Rehabilitation Department, Shenzhen Hospital of Southern Medical University, Shenzhen, 518052, China
| | - Yanbing Jiang
- Chinese Academy of Science (CAS) Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Shenzhen, 518055, China
| | - Lin Lu
- The Rehabilitation Department, Shenzhen Sixth People's Hospital, Shenzhen, 518052, China
| | - Zhen Huang
- The Department of Rehabilitation Medicine, Guangzhou Panyu Central Hospital, Guangzhou, 511400, China
| | - Shixiong Chen
- Chinese Academy of Science (CAS) Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Shenzhen, 518055, China.
| | - Guanglin Li
- Chinese Academy of Science (CAS) Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Shenzhen, 518055, China.
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Nishimura S, Tanaka T, Oda M, Habu M, Kodama M, Yoshiga D, Osawa K, Kokuryo S, Miyamoto I, Kito S, Wakasugi-Sato N, Matsumoto-Takeda S, Joujima T, Miyamura Y, Hitomi S, Yamamoto N, Uehara M, Sasaguri M, Ono K, Yoshioka I, Tominaga K, Morimoto Y. Functional evaluation of swallowing in patients with tongue cancer before and after surgery using high-speed continuous magnetic resonance imaging based on T2-weighted sequences. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 125:88-98. [PMID: 29128287 DOI: 10.1016/j.oooo.2017.09.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/21/2017] [Accepted: 09/20/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to determine the usefulness of evaluating the function of swallowing before and after surgery in patients with tongue cancer by using T2-weighted sequences of high-speed continuous magnetic resonance imaging (HSCMRI). STUDY DESIGN The imaging findings and related parameters on HSCMRI along with those on routine MRI examinations before and after surgery were examined in 19 patients with tongue cancer. In addition, changes in various parameters during 1 year after surgery were evaluated in 10 patients. RESULTS In most patients examined, the direction of flow to the esophagus could be seen on HSCMRI before and after surgery. Significant correlations were observed among 4 parameters and in the responses to a dysphagia questionnaire. CONCLUSIONS The results of the present study suggest that the dynamics of swallowing can be directly visualized on HSCMRI by using 4 parameters that permit the evaluation of changes before and after surgery, and this enables objective evaluation of patients' swallowing complaints.
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Affiliation(s)
- Shun Nishimura
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Tatsurou Tanaka
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Masafumi Oda
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Manabu Habu
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - Masaaki Kodama
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - Daigo Yoshiga
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - Kenji Osawa
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Japan
| | - Shinya Kokuryo
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Japan
| | - Ikuya Miyamoto
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Japan
| | - Shinji Kito
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Nao Wakasugi-Sato
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | | | - Takaaki Joujima
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Yuichi Miyamura
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan
| | - Suzuro Hitomi
- Division of Physiology, Kyushu Dental University, Kitakyushu, Japan
| | - Noriaki Yamamoto
- Department of Dentistry and Oral-Maxillo-Facial Surgery, Oita University, Oita, Japan
| | - Masataka Uehara
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - Masaaki Sasaguri
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - Kentaro Ono
- Division of Physiology, Kyushu Dental University, Kitakyushu, Japan
| | - Izumi Yoshioka
- Division of Oral Medicine, Kyushu Dental University, Kitakyushu, Japan
| | - Kazuhiro Tominaga
- Division of Maxillofacial Surgery, Kyushu Dental University, Kitakyushu, Japan
| | - Yasuhiro Morimoto
- Division of Oral and Maxillofacial Radiology, Kyushu Dental University, Kitakyushu, Japan; Center for Oral Biological Research, Kyushu Dental University, Kitakyushu, Japan.
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Daniels SK, Easterling CS. Continued Relevance of Videofluoroscopy in the Evaluation of Oropharyngeal Dysphagia. CURRENT RADIOLOGY REPORTS 2017. [DOI: 10.1007/s40134-017-0201-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Olthoff A, Joseph AA, Weidenmüller M, Riley B, Frahm J. Real-time MRI of swallowing: intraoral pressure reduction supports larynx elevation. NMR IN BIOMEDICINE 2016; 29:1618-1623. [PMID: 27687293 DOI: 10.1002/nbm.3621] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 06/06/2023]
Abstract
The reduction in intraoral pressure during swallowing has previously been linked to bolus transport, although no such relation has yet been proven. The purpose of this work was to evaluate the time course of intraoral pressure during swallowing using simultaneous real-time magnetic resonance imaging (MRI) and dynamic pressure recordings. Real-time MRI based on highly undersampled radial fast low-angle shot (FLASH) and regularized nonlinear inverse reconstruction was performed at 3 T using a standard head coil and a mid-sagittal section covering the entire oral cavity. Voluntary swallowing (10 mL of pineapple juice or saliva) was monitored for about 30 s in 11 normal subjects at spatial and temporal resolution of 1.3 × 1.3 × 8 mm3 and 40 ms, respectively. Simultaneously, the intraoral atmospheric pressure was recorded at a resolution of 10 ms during the entire course of deglutition. Quantitative measures of bolus transport, larynx elevation and submental muscle changes were obtained from the image series. As a key result, negative intraoral pressure accompanied laryngeal elevation during swallowing in all subjects. A reduction in submental muscle length during swallowing was also observed. No correlations of maximum negative pressure with larynx elevation and submental muscle change were found. In conclusion, intraoral pressure reduction during swallowing is not connected to oral bolus transport, but supports laryngeal elevation by palatal fixation of the tongue.
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Affiliation(s)
- Arno Olthoff
- Phoniatrics and Pedaudiology, Department of Otorhinolaryngology, University Medical Center, Göttingen, Germany.
| | - Arun A Joseph
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
- DZHK, German Center for Cardiovascular Research, partner site Göttingen, Germany
| | - Matthias Weidenmüller
- Phoniatrics and Pedaudiology, Department of Otorhinolaryngology, University Medical Center, Göttingen, Germany
| | - Blake Riley
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Jens Frahm
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
- DZHK, German Center for Cardiovascular Research, partner site Göttingen, Germany
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37
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Fu M, Barlaz MS, Holtrop JL, Perry JL, Kuehn DP, Shosted RK, Liang ZP, Sutton BP. High-frame-rate full-vocal-tract 3D dynamic speech imaging. Magn Reson Med 2016; 77:1619-1629. [PMID: 27099178 DOI: 10.1002/mrm.26248] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 03/25/2016] [Accepted: 03/28/2016] [Indexed: 11/08/2022]
Abstract
PURPOSE To achieve high temporal frame rate, high spatial resolution and full-vocal-tract coverage for three-dimensional dynamic speech MRI by using low-rank modeling and sparse sampling. METHODS Three-dimensional dynamic speech MRI is enabled by integrating a novel data acquisition strategy and an image reconstruction method with the partial separability model: (a) a self-navigated sparse sampling strategy that accelerates data acquisition by collecting high-nominal-frame-rate cone navigator sand imaging data within a single repetition time, and (b) are construction method that recovers high-quality speech dynamics from sparse (k,t)-space data by enforcing joint low-rank and spatiotemporal total variation constraints. RESULTS The proposed method has been evaluated through in vivo experiments. A nominal temporal frame rate of 166 frames per second (defined based on a repetition time of 5.99 ms) was achieved for an imaging volume covering the entire vocal tract with a spatial resolution of 2.2 × 2.2 × 5.0 mm3 . Practical utility of the proposed method was demonstrated via both validation experiments and a phonetics investigation. CONCLUSION Three-dimensional dynamic speech imaging is possible with full-vocal-tract coverage, high spatial resolution and high nominal frame rate to provide dynamic speech data useful for phonetic studies. Magn Reson Med 77:1619-1629, 2017. © 2016 International Society for Magnetic Resonance in Medicine.
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Affiliation(s)
- Maojing Fu
- Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.,Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Marissa S Barlaz
- Linguistics, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Joseph L Holtrop
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.,Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Jamie L Perry
- Communication Sciences and Disorders, East Carolina University, Greenville, North Carolina, USA
| | - David P Kuehn
- Speech and Hearing Science, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Ryan K Shosted
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.,Linguistics, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Zhi-Pei Liang
- Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.,Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Bradley P Sutton
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.,Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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38
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Toutios A, Narayanan SS. Advances in real-time magnetic resonance imaging of the vocal tract for speech science and technology research. APSIPA TRANSACTIONS ON SIGNAL AND INFORMATION PROCESSING 2016; 5:e6. [PMID: 27833745 PMCID: PMC5100697 DOI: 10.1017/atsip.2016.5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Real-time magnetic resonance imaging (rtMRI) of the moving vocal tract during running speech production is an important emerging tool for speech production research providing dynamic information of a speaker's upper airway from the entire mid-sagittal plane or any other scan plane of interest. There have been several advances in the development of speech rtMRI and corresponding analysis tools, and their application to domains such as phonetics and phonological theory, articulatory modeling, and speaker characterization. An important recent development has been the open release of a database that includes speech rtMRI data from five male and five female speakers of American English each producing 460 phonetically balanced sentences. The purpose of the present paper is to give an overview and outlook of the advances in rtMRI as a tool for speech research and technology development.
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Affiliation(s)
- Asterios Toutios
- Signal Analysis and Interpretation Laboratory (SAIL), University of Southern California (USC), 3740 McClintock Avenue, Los Angeles, CA 90089, USA
| | - Shrikanth S Narayanan
- Signal Analysis and Interpretation Laboratory (SAIL), University of Southern California (USC), 3740 McClintock Avenue, Los Angeles, CA 90089, USA
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39
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Lingala SG, Sutton BP, Miquel ME, Nayak KS. Recommendations for real-time speech MRI. J Magn Reson Imaging 2016; 43:28-44. [PMID: 26174802 PMCID: PMC5079859 DOI: 10.1002/jmri.24997] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 06/23/2015] [Indexed: 11/11/2022] Open
Abstract
Real-time magnetic resonance imaging (RT-MRI) is being increasingly used for speech and vocal production research studies. Several imaging protocols have emerged based on advances in RT-MRI acquisition, reconstruction, and audio-processing methods. This review summarizes the state-of-the-art, discusses technical considerations, and provides specific guidance for new groups entering this field. We provide recommendations for performing RT-MRI of the upper airway. This is a consensus statement stemming from the ISMRM-endorsed Speech MRI summit held in Los Angeles, February 2014. A major unmet need identified at the summit was the need for consensus on protocols that can be easily adapted by researchers equipped with conventional MRI systems. To this end, we provide a discussion of tradeoffs in RT-MRI in terms of acquisition requirements, a priori assumptions, artifacts, computational load, and performance for different speech tasks. We provide four recommended protocols and identify appropriate acquisition and reconstruction tools. We list pointers to open-source software that facilitate implementation. We conclude by discussing current open challenges in the methodological aspects of RT-MRI of speech.
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Affiliation(s)
| | - Brad P. Sutton
- University of Illinois at Urbana-Champaign, Urbana-Champaign, Illinois, USA
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40
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Alyami J, Spiller RC, Marciani L. Magnetic resonance imaging to evaluate gastrointestinal function. Neurogastroenterol Motil 2015; 27:1687-92. [PMID: 26598049 DOI: 10.1111/nmo.12726] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 10/14/2015] [Indexed: 02/08/2023]
Abstract
Magnetic resonance imaging of gastrointestinal (GI) function has advanced substantially in the last few years. The ability to obtain high resolution images of the undisturbed bowel with tunable tissue contrast and using no ionizing radiation are clear advantages, particularly for children and women of reproductive age. Barriers to diffusion in clinical practice so far include the need to demonstrate clinical value and the burden of data processing. Both difficulties are being addressed and the technique is providing novel insights into both upper and lower GI disorders of function at an ever increasing rate.
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Affiliation(s)
- J Alyami
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK.,NIHR Nottingham Digestive Disease Biomedical Research Unit, Nottingham University Hospitals NHS Trust and University of Nottingham, Nottingham, UK
| | - R C Spiller
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK.,NIHR Nottingham Digestive Disease Biomedical Research Unit, Nottingham University Hospitals NHS Trust and University of Nottingham, Nottingham, UK
| | - L Marciani
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK.,NIHR Nottingham Digestive Disease Biomedical Research Unit, Nottingham University Hospitals NHS Trust and University of Nottingham, Nottingham, UK
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41
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Kulinna-Cosentini C, Czerny C, Baumann A, Weber M, Sinko K. TrueFisp versus HASTE sequences in 3T cine MRI: Evaluation of image quality during phonation in patients with velopharyngeal insufficiency. Eur Radiol 2015; 26:2892-8. [DOI: 10.1007/s00330-015-4115-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 10/29/2015] [Accepted: 11/12/2015] [Indexed: 11/30/2022]
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42
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Khalaf A, Hoad CL, Spiller RC, Gowland PA, Moran GW, Marciani L. Magnetic resonance imaging biomarkers of gastrointestinal motor function and fluid distribution. World J Gastrointest Pathophysiol 2015; 6:140-149. [PMID: 26600972 PMCID: PMC4644878 DOI: 10.4291/wjgp.v6.i4.140] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/28/2015] [Accepted: 10/27/2015] [Indexed: 02/07/2023] Open
Abstract
Magnetic resonance imaging (MRI) is a well established technique that has revolutionized diagnostic radiology. Until recently, the impact that MRI has had in the assessment of gastrointestinal motor function and bowel fluid distribution in health and in disease has been more limited, despite the novel insights that MRI can provide along the entire gastrointestinal tract. MRI biomarkers include intestinal motility indices, small bowel water content and whole gut transit time. The present review discusses new developments and applications of MRI in the upper gastrointestinal tract, the small bowel and the colon reported in the literature in the last 5 years.
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43
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Iltis PW, Schoonderwaldt E, Zhang S, Frahm J, Altenmüller E. Real-time MRI comparisons of brass players: A methodological pilot study. Hum Mov Sci 2015; 42:132-45. [DOI: 10.1016/j.humov.2015.04.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 04/21/2015] [Accepted: 04/27/2015] [Indexed: 10/23/2022]
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44
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Zhang S, Joseph AA, Gross L, Ghadimi M, Frahm J, Beham AW. Diagnosis of Gastroesophageal Reflux Disease Using Real-time Magnetic Resonance Imaging. Sci Rep 2015; 5:12112. [PMID: 26175205 PMCID: PMC4648433 DOI: 10.1038/srep12112] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 04/30/2015] [Indexed: 12/31/2022] Open
Abstract
A small angle (His angle) between the oesophagus and the fundus of the stomach is considered to act as flap valve and anti-reflux barrier. A wide angle results in dysfunction of the oesophagogastric junction and subsequently in gastroesophageal reflux disease (GERD). Here, we used real-time magnetic resonance imaging (MRI) at 50 ms resolution (20 frames per second) in 12 volunteers and 12 patients with GERD to assess transport of pineapple juice through the oesophagogastric junction and reflux during Valsalva. We found that the intra-abdominal part of the oesophagus was bended towards the left side resulting in an angle of 75.3 ± 17.4, which was significantly larger during Valsava (P = 0.017). Reflux and several underlying pathologies were detected in 11 out of 12 patients. Our data visualize oesophagogastric junction physiology and disprove the flap valve hypothesis. Further, non-invasive real-time MRI has considerable potential for the diagnosis of causative pathologies leading to GERD.
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Affiliation(s)
- Shuo Zhang
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Arun A Joseph
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Lisa Gross
- Department of Surgery, University Medical Center, Göttingen, Germany
| | - Michael Ghadimi
- Department of Surgery, University Medical Center, Göttingen, Germany
| | - Jens Frahm
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Alexander W Beham
- Department of Surgery, University Medical Center, Göttingen, Germany
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45
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Untenberger M, Tan Z, Voit D, Joseph AA, Roeloffs V, Merboldt KD, Schätz S, Frahm J. Advances in real-time phase-contrast flow MRI using asymmetric radial gradient echoes. Magn Reson Med 2015; 75:1901-8. [PMID: 26096085 DOI: 10.1002/mrm.25696] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 02/17/2015] [Accepted: 02/24/2015] [Indexed: 11/11/2022]
Abstract
PURPOSE To provide multidimensional velocity compensation for real-time phase-contrast flow MRI. METHODS The proposed method introduces asymmetric gradient echoes for highly undersampled radial FLASH MRI with phase-sensitive image reconstruction by regularized nonlinear inversion (NLINV). Using an adapted gradient delay correction the resulting image quality was analyzed by simulations and experimentally validated at 3 Tesla. For real-time flow MRI the reduced gradient-echo timing allowed for the incorporation of velocity-compensating waveforms for all imaging gradients at even shorter repetition times. RESULTS The results reveal a usable degree of 20% asymmetry. Real-time flow MRI with full velocity compensation eliminated signal void in a flow phantom, confirmed flow parameters in healthy subjects and demonstrated signal recovery and phase conservation in a patient with aortic valve insufficiency and stenosis. Exemplary protocols at 1.4-1.5 mm resolution and 6 mm slice thickness achieved total acquisition times of 33.3-35.7 ms for two images (7 spokes each) with and without flow-encoding gradient. CONCLUSION Asymmetric gradient echoes were successfully implemented for highly undersampled radial trajectories. The resulting temporal gain offers full velocity compensation for real-time phase-contrast flow MRI which minimizes false-positive contributions from complex flow and further enhances the temporal resolution compared with acquisitions with symmetric echoes.
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Affiliation(s)
- Markus Untenberger
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Zhengguo Tan
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Dirk Voit
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Arun A Joseph
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany.,DZHK, German Center for Cardiovascular Research, partner site Göttingen, Germany
| | - Volkert Roeloffs
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - K Dietmar Merboldt
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Sebastian Schätz
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Jens Frahm
- Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany.,DZHK, German Center for Cardiovascular Research, partner site Göttingen, Germany
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Iltis PW, Frahm J, Voit D, Joseph AA, Schoonderwaldt E, Altenmüller E. High-speed real-time magnetic resonance imaging of fast tongue movements in elite horn players. Quant Imaging Med Surg 2015; 5:374-81. [PMID: 26029640 DOI: 10.3978/j.issn.2223-4292.2015.03.02] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 02/27/2015] [Indexed: 12/23/2022]
Abstract
This paper describes the use of high-speed real-time (RT) magnetic resonance imaging (MRI) in quantifying very rapid motor function within the oropharyngeal cavity of six elite horn players. Based on simultaneous sound recordings, the efficacy of RT-MRI films at 30 and 100 frames per second (fps) was assessed for tongue movements associated with double tonguing performance. Serial images with a nominal temporal resolution of 10.0 and 33.3 ms were obtained by highly undersampled radial fast low-angle shot (FLASH) sequences (5 and 17 spokes, respectively) using complementary sets of spokes for successive acquisitions (extending over 9 and 5 frames, respectively). Reconstructions of high-speed images were obtained by temporally regularized nonlinear inversion (NLINV) as previously described. A customized MATLAB toolkit was developed for the extraction of line profiles from MRI films to quantify temporal phenomena associated with task performance. The analyses reveal that for the present setting, which required the use of a temporal median filter to optimize image quality, acquisition rates of 30 fps are inadequate to accurately detect tongue movements during double tonguing, but that rates of 100 fps do allow for a precise quantification of movement. These data for the first time demonstrate the extreme performance of elite horn players. High-speed RT-MRI offers so far unavailable opportunities to study the oropharyngeal movements during brass playing with future potential for teaching and the treatment of patients suffering from dystonia.
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Affiliation(s)
- Peter W Iltis
- 1 Department of Kinesiology, Gordon College, Wenham, MA, USA ; 2 University of Music, Drama and Media, Hannover, Germany ; 3 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Jens Frahm
- 1 Department of Kinesiology, Gordon College, Wenham, MA, USA ; 2 University of Music, Drama and Media, Hannover, Germany ; 3 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Dirk Voit
- 1 Department of Kinesiology, Gordon College, Wenham, MA, USA ; 2 University of Music, Drama and Media, Hannover, Germany ; 3 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Arun A Joseph
- 1 Department of Kinesiology, Gordon College, Wenham, MA, USA ; 2 University of Music, Drama and Media, Hannover, Germany ; 3 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Erwin Schoonderwaldt
- 1 Department of Kinesiology, Gordon College, Wenham, MA, USA ; 2 University of Music, Drama and Media, Hannover, Germany ; 3 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
| | - Eckart Altenmüller
- 1 Department of Kinesiology, Gordon College, Wenham, MA, USA ; 2 University of Music, Drama and Media, Hannover, Germany ; 3 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany
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Liu HL, Chang TT, Yan FX, Li CH, Lin YS, Wong AM. Assessment of vessel permeability by combining dynamic contrast-enhanced and arterial spin labeling MRI. NMR IN BIOMEDICINE 2015; 28:642-649. [PMID: 25880892 DOI: 10.1002/nbm.3297] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 02/19/2015] [Accepted: 03/05/2015] [Indexed: 06/04/2023]
Abstract
The forward volumetric transfer constant (K(trans)), a physiological parameter extracted from dynamic contrast-enhanced (DCE) MRI, is weighted by vessel permeability and tissue blood flow. The permeability × surface area product per unit mass of tissue (PS) in brain tumors was estimated in this study by combining the blood flow obtained through pseudo-continuous arterial spin labeling (PCASL) and K(trans) obtained through DCE MRI. An analytical analysis and a numerical simulation were conducted to understand how errors in the flow and K(trans) estimates would propagate to the resulting PS. Fourteen pediatric patients with brain tumors were scanned on a clinical 3-T MRI scanner. PCASL perfusion imaging was performed using a three-dimensional (3D) fast-spin-echo readout module to determine blood flow. DCE imaging was performed using a 3D spoiled gradient-echo sequence, and the K(trans) map was obtained with the extended Tofts model. The numerical analysis demonstrated that the uncertainty of PS was predominantly dependent on that of K(trans) and was relatively insensitive to the flow. The average PS values of the whole tumors ranged from 0.006 to 0.217 min(-1), with a mean of 0.050 min(-1) among the patients. The mean K(trans) value was 18% lower than the PS value, with a maximum discrepancy of 25%. When the parametric maps were compared on a voxel-by-voxel basis, the discrepancies between PS and K(trans) appeared to be heterogeneous within the tumors. The PS values could be more than two-fold higher than the K(trans) values for voxels with high K(trans) levels. This study proposes a method that is easy to implement in clinical practice and has the potential to improve the quantification of the microvascular properties of brain tumors.
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Affiliation(s)
- Ho-Ling Liu
- Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Imaging Physics, University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Ting-Ting Chang
- Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Feng-Xian Yan
- Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Radiology, Taipei Medical University/Shuang-Ho Hospital, New Taipei City, Taiwan
| | - Cheng-He Li
- Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Shi Lin
- Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Alex M Wong
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital at Keelong, Linkou Medical Center, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
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48
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Fu M, Zhao B, Carignan C, Shosted RK, Perry JL, Kuehn DP, Liang ZP, Sutton BP. High-resolution dynamic speech imaging with joint low-rank and sparsity constraints. Magn Reson Med 2015; 73:1820-32. [PMID: 24912452 PMCID: PMC4261062 DOI: 10.1002/mrm.25302] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 04/11/2014] [Accepted: 05/05/2014] [Indexed: 11/11/2022]
Abstract
PURPOSE To enable dynamic speech imaging with high spatiotemporal resolution and full-vocal-tract spatial coverage, leveraging recent advances in sparse sampling. METHODS An imaging method is developed to enable high-speed dynamic speech imaging exploiting low-rank and sparsity of the dynamic images of articulatory motion during speech. The proposed method includes: (a) a novel data acquisition strategy that collects spiral navigators with high temporal frame rate and (b) an image reconstruction method that derives temporal subspaces from navigators and reconstructs high-resolution images from sparsely sampled data with joint low-rank and sparsity constraints. RESULTS The proposed method has been systematically evaluated and validated through several dynamic speech experiments. A nominal imaging speed of 102 frames per second (fps) was achieved for a single-slice imaging protocol with a spatial resolution of 2.2 × 2.2 × 6.5 mm(3) . An eight-slice imaging protocol covering the entire vocal tract achieved a nominal imaging speed of 12.8 fps with the identical spatial resolution. The effectiveness of the proposed method and its practical utility was also demonstrated in a phonetic investigation. CONCLUSION High spatiotemporal resolution with full-vocal-tract spatial coverage can be achieved for dynamic speech imaging experiments with low-rank and sparsity constraints.
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Affiliation(s)
- Maojing Fu
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Bo Zhao
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | | | - Ryan K. Shosted
- Department of Linguistics, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Jamie L. Perry
- Department of Communication Sciences and Disorders, East Carolina University, Greenville, North Carolina
| | - David P. Kuehn
- Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Zhi-Pei Liang
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Bradley P. Sutton
- Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois
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49
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A Comparison of Different Methods to Generate Tooth Surface Models Without Applying Ionizing Radiation for Digital 3-Dimensional Image Fusion With Magnetic Resonance Imaging–Based Data of the Head and Neck Region. J Comput Assist Tomogr 2015; 39:882-9. [PMID: 26295193 DOI: 10.1097/rct.0000000000000293] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zhang S, Joseph AA, Voit D, Schaetz S, Merboldt KD, Unterberg-Buchwald C, Hennemuth A, Lotz J, Frahm J. Real-time magnetic resonance imaging of cardiac function and flow-recent progress. Quant Imaging Med Surg 2014; 4:313-29. [PMID: 25392819 DOI: 10.3978/j.issn.2223-4292.2014.06.03] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 05/30/2014] [Indexed: 11/14/2022]
Abstract
Cardiac structure, function and flow are most commonly studied by ultrasound, X-ray and magnetic resonance imaging (MRI) techniques. However, cardiovascular MRI is hitherto limited to electrocardiogram (ECG)-synchronized acquisitions and therefore often results in compromised quality for patients with arrhythmias or inabilities to comply with requested protocols-especially with breath-holding. Recent advances in the development of novel real-time MRI techniques now offer dynamic imaging of the heart and major vessels with high spatial and temporal resolution, so that examinations may be performed without the need for ECG synchronization and during free breathing. This article provides an overview of technical achievements, physiological validations, preliminary patient studies and translational aspects for a future clinical scenario of cardiovascular MRI in real time.
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Affiliation(s)
- Shuo Zhang
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Arun A Joseph
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Dirk Voit
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Sebastian Schaetz
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Klaus-Dietmar Merboldt
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Christina Unterberg-Buchwald
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Anja Hennemuth
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Joachim Lotz
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
| | - Jens Frahm
- 1 Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen 37070, Germany ; 2 DZHK (German Cardiovascular Research Center), partner site Göttingen, Göttingen, Germany ; 3 Diagnostische und Interventionelle Radiologie, 4 Kardiologie und Pneumologie, Universitätsmedizin Göttingen, Göttingen 37075, Germany ; 5 Fraunhofer MEVIS Institute for Medical Image Computing, Bremen, Germany
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