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Lei L, Tang H, Zhang J, Wu Y, Zhao B, Hu Y, Li B. Automatic registration and precise tumour localization method for robot-assisted puncture procedure under inconsistent breath-holding conditions. Int J Med Robot 2021; 17:e2319. [PMID: 34379863 DOI: 10.1002/rcs.2319] [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: 05/11/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND During percutaneous puncture procedure, breath holding is subjectively controlled by patients, and it is difficult to ensure consistent tumour position between the preoperative CT scanning phase and the intraoperative puncture phase. In addition, the manual registration process is time-consuming and has low accuracy. METHODS We have proposed an automatic registration method using optical markers and a tumour breath-holding position estimation model based on the support vector regression algorithm. A robot system and a tumour respiratory motion simulation platform are built to perform puncture tests under different breath-holding states. RESULTS The experimental results show that automatic registration has higher accuracy than manual registration, and with the tumour breath-holding position estimation model, the targeting accuracy of puncture under inconsistent breath-holding conditions is greatly improved. CONCLUSIONS The proposed automatic registration and tumour breath-holding position estimation model can improve the accuracy and efficiency of puncture under inconsistent breath-holding conditions.
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Affiliation(s)
- Long Lei
- Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, China.,Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Huajie Tang
- Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, China.,Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Jiawei Zhang
- Department of Urology, Shenzhen University General Hospital, Shenzhen, China
| | - Yuqi Wu
- Department of Urology, Shenzhen University General Hospital, Shenzhen, China
| | - Baoliang Zhao
- Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Ying Hu
- Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Pazhou Lab, Guangzhou, China
| | - Bing Li
- Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, China
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Ma Y, James Housden R, Fazili A, Arujuna AV, Rhode KS. Real-time registration of 3D echo to x-ray fluoroscopy based on cascading classifiers and image registration. Phys Med Biol 2021; 66:055019. [PMID: 33556925 DOI: 10.1088/1361-6560/abe420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Three-dimensional (3D) transesophageal echocardiography (TEE) is one of the most significant advances in cardiac imaging. Although TEE provides real-time 3D visualization of heart tissues and blood vessels and has no ionizing radiation, x-ray fluoroscopy still dominates in guidance of cardiac interventions due to TEE having a limited field of view and poor visualization of surgical instruments. Therefore, fusing 3D echo with live x-ray images can provide a better guidance solution. This paper proposes a novel framework for image fusion by detecting the pose of the TEE probe in x-ray images in real-time. The framework does not require any manual initialization. Instead it uses a cascade classifier to compute the position and in-plane rotation angle of the TEE probe. The remaining degrees of freedom are determined by fast marching against a template library. The proposed framework is validated on phantoms and patient data. The target registration error for the phantom was 2.1 mm. In addition, 10 patient datasets, seven of which were acquired from cardiac electrophysiology procedures and three from trans-catheter aortic valve implantation procedures, were used to test the clinical feasibility as well as accuracy. A mean registration error of 2.6 mm was achieved, which is well within typical clinical requirements.
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Affiliation(s)
- YingLiang Ma
- School of Computing, Electronics and Mathematics, Coventry University, CV1 5FB, United Kingdom
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Bao N, Li A, Zhao W, Cui Z, Tian X, Yue Y, Li H, Qian W. Automated fiducial marker detection and fiducial point localization in CT images for lung biopsy image-guided surgery systems. JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY 2019; 27:417-429. [PMID: 30958321 DOI: 10.3233/xst-180464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the lung biopsy image-guided surgery systems, the fiducial markers are used for point-based registration of the patient space to the CT image space. Fiducial marker detection and fiducial point localization in CT images have great influence on the accuracy of registration and guidance. This study proposes a fiducial marker detection approach based on the features of marker image slice sequences and a fiducial point localization approach according to marker projection images, without depending on the priori-knowledge of the marker default parameters provided by the manufacturers. The accuracy of our method was validated based on a CT image dataset of 24 patients. The experimental results showed that all 144 markers of 24 patients were correctly detected, and the fiducial points were localized with the average error of 0.35 mm. In addition, the localization accuracy of the proposed method was improved by an average of 12.5% compared with the accuracy of the previous method using the marker default parameters provided by the manufacturers. Thus, the study demonstrated that the proposed detection and localization methods are accurate and robust, which is quite encouraging to meet the requirement of future clinical applications in the image guided lung biopsy and surgery systems.
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Affiliation(s)
- Nan Bao
- Sino-Dutch Biomedical and Information Engineering School, Northeastern University, Shen Yang, Liao Ning, China
| | - Ang Li
- Sino-Dutch Biomedical and Information Engineering School, Northeastern University, Shen Yang, Liao Ning, China
| | - Wei Zhao
- Sino-Dutch Biomedical and Information Engineering School, Northeastern University, Shen Yang, Liao Ning, China
| | - Zhiming Cui
- Department of Computer Science, The University of Hong Kong, Hong Kong, China
| | - Xinhua Tian
- Department of Radiology, The Second Hospital of Jilin University, Chang Chun, Ji Lin, China
| | - Yong Yue
- Department of Radiology, ShengJing Hospital of China Medical University, Shen Yang, Liao Ning, China
| | - Hong Li
- Sino-Dutch Biomedical and Information Engineering School, Northeastern University, Shen Yang, Liao Ning, China
| | - Wei Qian
- Sino-Dutch Biomedical and Information Engineering School, Northeastern University, Shen Yang, Liao Ning, China
- Department of Electrical and Computer Engineering, University of Texas at El Paso, TX, USA
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Favazza CP, Gorny KR, Callstrom MR, Kurup AN, Washburn M, Trester PS, Fowler CL, Hangiandreou NJ. Development of a robust MRI fiducial system for automated fusion of MR-US abdominal images. J Appl Clin Med Phys 2018; 19:261-270. [PMID: 29785834 PMCID: PMC6036384 DOI: 10.1002/acm2.12352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/30/2018] [Accepted: 04/05/2018] [Indexed: 11/17/2022] Open
Abstract
We present the development of a two‐component magnetic resonance (MR) fiducial system, that is, a fiducial marker device combined with an auto‐segmentation algorithm, designed to be paired with existing ultrasound probe tracking and image fusion technology to automatically fuse MR and ultrasound (US) images. The fiducial device consisted of four ~6.4 mL cylindrical wells filled with 1 g/L copper sulfate solution. The algorithm was designed to automatically segment the device in clinical abdominal MR images. The algorithm's detection rate and repeatability were investigated through a phantom study and in human volunteers. The detection rate was 100% in all phantom and human images. The center‐of‐mass of the fiducial device was robustly identified with maximum variations of 2.9 mm in position and 0.9° in angular orientation. In volunteer images, average differences between algorithm‐measured inter‐marker spacings and actual separation distances were 0.53 ± 0.36 mm. “Proof‐of‐concept” automatic MR‐US fusions were conducted with sets of images from both a phantom and volunteer using a commercial prototype system, which was built based on the above findings. Image fusion accuracy was measured to be within 5 mm for breath‐hold scanning. These results demonstrate the capability of this approach to automatically fuse US and MR images acquired across a wide range of clinical abdominal pulse sequences.
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Affiliation(s)
| | | | | | - Anil N. Kurup
- Department of Radiology; Mayo Clinic; Rochester MN USA
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5
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Image-Guided Surgical Robotic System for Percutaneous Reduction of Joint Fractures. Ann Biomed Eng 2017; 45:2648-2662. [PMID: 28815387 PMCID: PMC5663813 DOI: 10.1007/s10439-017-1901-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 08/09/2017] [Indexed: 11/03/2022]
Abstract
Complex joint fractures often require an open surgical procedure, which is associated with extensive soft tissue damages and longer hospitalization and rehabilitation time. Percutaneous techniques can potentially mitigate these risks but their application to joint fractures is limited by the current sub-optimal 2D intra-operative imaging (fluoroscopy) and by the high forces involved in the fragment manipulation (due to the presence of soft tissue, e.g., muscles) which might result in fracture malreduction. Integration of robotic assistance and 3D image guidance can potentially overcome these issues. The authors propose an image-guided surgical robotic system for the percutaneous treatment of knee joint fractures, i.e., the robot-assisted fracture surgery (RAFS) system. It allows simultaneous manipulation of two bone fragments, safer robot-bone fixation system, and a traction performing robotic manipulator. This system has led to a novel clinical workflow and has been tested both in laboratory and in clinically relevant cadaveric trials. The RAFS system was tested on 9 cadaver specimens and was able to reduce 7 out of 9 distal femur fractures (T- and Y-shape 33-C1) with acceptable accuracy (≈1 mm, ≈5°), demonstrating its applicability to fix knee joint fractures. This study paved the way to develop novel technologies for percutaneous treatment of complex fractures including hip, ankle, and shoulder, thus representing a step toward minimally-invasive fracture surgeries.
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Dagnino G, Georgilas I, Morad S, Gibbons P, Tarassoli P, Atkins R, Dogramadzi S. Intra-operative fiducial-based CT/fluoroscope image registration framework for image-guided robot-assisted joint fracture surgery. Int J Comput Assist Radiol Surg 2017; 12:1383-1397. [PMID: 28474269 PMCID: PMC5541125 DOI: 10.1007/s11548-017-1602-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 04/25/2017] [Indexed: 11/30/2022]
Abstract
Purpose Joint fractures must be accurately reduced minimising soft tissue damages to avoid negative surgical outcomes. To this regard, we have developed the RAFS surgical system, which allows the percutaneous reduction of intra-articular fractures and provides intra-operative real-time 3D image guidance to the surgeon. Earlier experiments showed the effectiveness of the RAFS system on phantoms, but also key issues which precluded its use in a clinical application. This work proposes a redesign of the RAFS’s navigation system overcoming the earlier version’s issues, aiming to move the RAFS system into a surgical environment. Methods The navigation system is improved through an image registration framework allowing the intra-operative registration between pre-operative CT images and intra-operative fluoroscopic images of a fractured bone using a custom-made fiducial marker. The objective of the registration is to estimate the relative pose between a bone fragment and an orthopaedic manipulation pin inserted into it intra-operatively. The actual pose of the bone fragment can be updated in real time using an optical tracker, enabling the image guidance. Results Experiments on phantom and cadavers demonstrated the accuracy and reliability of the registration framework, showing a reduction accuracy (sTRE) of about \documentclass[12pt]{minimal}
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\begin{document}$$0.88~\pm 0.2\,\hbox {mm}$$\end{document}0.88±0.2mm (phantom) and \documentclass[12pt]{minimal}
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\begin{document}$$1.15\pm 0.8\,\hbox {mm}$$\end{document}1.15±0.8mm (cadavers). Four distal femur fractures were successfully reduced in cadaveric specimens using the improved navigation system and the RAFS system following the new clinical workflow (reduction error \documentclass[12pt]{minimal}
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\begin{document}$$1.2\pm 0.3\,\hbox {mm}$$\end{document}1.2±0.3mm, \documentclass[12pt]{minimal}
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\begin{document}$$2\pm 1{^{\circ }})$$\end{document}2±1∘). Conclusion Experiments showed the feasibility of the image registration framework. It was successfully integrated into the navigation system, allowing the use of the RAFS system in a realistic surgical application.
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Affiliation(s)
- Giulio Dagnino
- Bristol Robotics Laboratory, University of the West of England, Coldharbour Lane, BS161QY, Bristol, UK.
| | - Ioannis Georgilas
- Bristol Robotics Laboratory, University of the West of England, Coldharbour Lane, BS161QY, Bristol, UK
| | - Samir Morad
- Bristol Robotics Laboratory, University of the West of England, Coldharbour Lane, BS161QY, Bristol, UK.,Aston University, B47ET, Birmingham, UK
| | - Peter Gibbons
- Bristol Robotics Laboratory, University of the West of England, Coldharbour Lane, BS161QY, Bristol, UK
| | - Payam Tarassoli
- University Hospitals Bristol, Upper Maudlin Street, BS28HW, Bristol, UK
| | - Roger Atkins
- University Hospitals Bristol, Upper Maudlin Street, BS28HW, Bristol, UK
| | - Sanja Dogramadzi
- Bristol Robotics Laboratory, University of the West of England, Coldharbour Lane, BS161QY, Bristol, UK
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McGuirt D, Mazal J, Rogers T, Faranesh AZ, Schenke W, Stine A, Grant L, Lederman RJ. X-ray Fused With Magnetic Resonance Imaging to Guide Endomyocardial Biopsy of a Right Ventricular Mass. Radiol Technol 2016; 87:622-626. [PMID: 27390230 PMCID: PMC5027072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Accepted: 02/04/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND A patient with a history of cancer in remission and congestive heart failure with no acute symptoms presented for a follow-up echocardiogram. The scan revealed a new echodense mass filling his right ventricular apex. An endomyocardial biopsy guided by x-ray fused with magnetic resonance (MR) imaging (XFM) was performed. This case report outlines the steps of XFM image preparation involving MR image acquisition, processing, and coregistration with x-ray fluoroscopy. DISCUSSION In cases of focal pathology or cardiac masses, endomyocardial biopsy can be challenging because x-ray fluoroscopy guidance offers limited visualization of soft-tissue structures. XFM overcomes this issue by overlaying high-resolution MR images onto x-ray fluoroscopy images. CONCLUSION This case report illustrates the clinical use of XFM for endomyocardial biopsy of an apical right ventricular mass and provides a practical, step-by-step description of MR image acquisition, processing, and coregistration with fluoroscopy, as performed by the MR technologist.
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8
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Schmidt EJ. Magnetic Resonance Imaging-Guided Cardiac Interventions. Magn Reson Imaging Clin N Am 2015; 23:563-77. [PMID: 26499275 DOI: 10.1016/j.mric.2015.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Performing intraoperative cardiovascular procedures inside an MR imaging scanner can potentially provide substantial advantage in clinical outcomes by reducing the risk and increasing the success rate relative to the way such procedures are performed today, in which the primary surgical guidance is provided by X-ray fluoroscopy, by electromagnetically tracked intraoperative devices, and by ultrasound. Both noninvasive and invasive cardiologists are becoming increasingly familiar with the capabilities of MR imaging for providing anatomic and physiologic information that is unequaled by other modalities. As a result, researchers began performing animal (preclinical) interventions in the cardiovascular system in the early 1990s.
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Affiliation(s)
- Ehud J Schmidt
- Radiology Department, Brigham and Women's Hospital, 221 Longwood Avenue, Room BRB 34C, Boston, MA 02115, USA.
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9
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Fagan TE, Truong UT, Jone PN, Bracken J, Quaife R, Hazeem AAA, Salcedo EE, Fonseca BM. Multimodality 3-dimensional image integration for congenital cardiac catheterization. Methodist Debakey Cardiovasc J 2015; 10:68-76. [PMID: 25114757 DOI: 10.14797/mdcj-10-2-68] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Cardiac catheterization procedures for patients with congenital and structural heart disease are becoming more complex. New imaging strategies involving integration of 3-dimensional images from rotational angiography, magnetic resonance imaging (MRI), computerized tomography (CT), and transesophageal echocardiography (TEE) are employed to facilitate these procedures. We discuss the current use of these new 3D imaging technologies and their advantages and challenges when used to guide complex diagnostic and interventional catheterization procedures in patients with congenital heart disease.
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Affiliation(s)
| | | | | | - John Bracken
- University of Colorado, Aurora, Colorado ; Philips Research North America, Briarcliff Manor, New York
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10
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Gong RH, Güler Ö, Kürklüoglu M, Lovejoy J, Yaniv Z. Interactive initialization of 2D/3D rigid registration. Med Phys 2014; 40:121911. [PMID: 24320522 DOI: 10.1118/1.4830428] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Registration is one of the key technical components in an image-guided navigation system. A large number of 2D/3D registration algorithms have been previously proposed, but have not been able to transition into clinical practice. The authors identify the primary reason for the lack of adoption with the prerequisite for a sufficiently accurate initial transformation, mean target registration error of about 10 mm or less. In this paper, the authors present two interactive initialization approaches that provide the desired accuracy for x-ray/MR and x-ray/CT registration in the operating room setting. METHODS The authors have developed two interactive registration methods based on visual alignment of a preoperative image, MR, or CT to intraoperative x-rays. In the first approach, the operator uses a gesture based interface to align a volume rendering of the preoperative image to multiple x-rays. The second approach uses a tracked tool available as part of a navigation system. Preoperatively, a virtual replica of the tool is positioned next to the anatomical structures visible in the volumetric data. Intraoperatively, the physical tool is positioned in a similar manner and subsequently used to align a volume rendering to the x-ray images using an augmented reality (AR) approach. Both methods were assessed using three publicly available reference data sets for 2D/3D registration evaluation. RESULTS In the authors' experiments, the authors show that for x-ray/MR registration, the gesture based method resulted in a mean target registration error (mTRE) of 9.3 ± 5.0 mm with an average interaction time of 146.3 ± 73.0 s, and the AR-based method had mTREs of 7.2 ± 3.2 mm with interaction times of 44 ± 32 s. For x-ray/CT registration, the gesture based method resulted in a mTRE of 7.4 ± 5.0 mm with an average interaction time of 132.1 ± 66.4 s, and the AR-based method had mTREs of 8.3 ± 5.0 mm with interaction times of 58 ± 52 s. CONCLUSIONS Based on the authors' evaluation, the authors conclude that the registration approaches are sufficiently accurate for initializing 2D/3D registration in the OR setting, both when a tracking system is not in use (gesture based approach), and when a tracking system is already in use (AR based approach).
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Affiliation(s)
- Ren Hui Gong
- The Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, Washington, DC 20010
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Braidy N, Poljak A, Marjo C, Rutlidge H, Rich A, Jayasena T, Inestrosa NC, Sachdev P. Metal and complementary molecular bioimaging in Alzheimer's disease. Front Aging Neurosci 2014; 6:138. [PMID: 25076902 PMCID: PMC4098123 DOI: 10.3389/fnagi.2014.00138] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 06/09/2014] [Indexed: 12/30/2022] Open
Abstract
Alzheimer's disease (AD) is the leading cause of dementia in the elderly, affecting over 27 million people worldwide. AD represents a complex neurological disorder which is best understood as the consequence of a number of interconnected genetic and lifestyle variables, which culminate in multiple changes to brain structure and function. These can be observed on a gross anatomical level in brain atrophy, microscopically in extracellular amyloid plaque and neurofibrillary tangle formation, and at a functional level as alterations of metabolic activity. At a molecular level, metal dyshomeostasis is frequently observed in AD due to anomalous binding of metals such as Iron (Fe), Copper (Cu), and Zinc (Zn), or impaired regulation of redox-active metals which can induce the formation of cytotoxic reactive oxygen species and neuronal damage. Metal chelators have been administered therapeutically in transgenic mice models for AD and in clinical human AD studies, with positive outcomes. As a result, neuroimaging of metals in a variety of intact brain cells and tissues is emerging as an important tool for increasing our understanding of the role of metal dysregulation in AD. Several imaging techniques have been used to study the cerebral metallo-architecture in biological specimens to obtain spatially resolved data on chemical elements present in a sample. Hyperspectral techniques, such as particle-induced X-ray emission (PIXE), energy dispersive X-ray spectroscopy (EDS), X-ray fluorescence microscopy (XFM), synchrotron X-ray fluorescence (SXRF), secondary ion mass spectrometry (SIMS), and laser ablation inductively coupled mass spectrometry (LA-ICPMS) can reveal relative intensities and even semi-quantitative concentrations of a large set of elements with differing spatial resolution and detection sensitivities. Other mass spectrometric and spectroscopy imaging techniques such as laser ablation electrospray ionization mass spectrometry (LA ESI-MS), MALDI imaging mass spectrometry (MALDI-IMS), and Fourier transform infrared spectroscopy (FTIR) can be used to correlate changes in elemental distribution with the underlying pathology in AD brain specimens. Taken together, these techniques provide new techniques to probe the pathobiology of AD and pave the way for identifying new therapeutic targets. The current review aims to discuss the advantages and challenges of using these emerging elemental and molecular imaging techniques, and highlight clinical achievements in AD research using bioimaging techniques.
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Affiliation(s)
- Nady Braidy
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia
| | - Anne Poljak
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia ; Bioanalytical Mass Spectrometry Facility, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia ; Faculty of Medicine, School of Medical Sciences, University of New South Wales Sydney, NSW, Australia
| | - Christopher Marjo
- Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia
| | - Helen Rutlidge
- Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia
| | - Anne Rich
- Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia
| | - Tharusha Jayasena
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia
| | - Nibaldo C Inestrosa
- Faculty of Biological Sciences, Centre for Ageing and Regeneration, P. Catholic University of Chile Santiago, Chile
| | - Perminder Sachdev
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia ; Euroa Centre, Neuropsychiatric Institute, Prince of Wales Hospital Sydney, NSW, Australia
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12
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Pushparajah K, Tzifa A, Razavi R. Cardiac MRI catheterization: a 10-year single institution experience and review. Interv Cardiol 2014. [DOI: 10.2217/ica.14.28] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Ghodadra A, Jones MH, Miniaci A, Winalski CS. A method for registration of full-limb radiographs to knee MRI. Skeletal Radiol 2014; 43:523-8. [PMID: 24425346 DOI: 10.1007/s00256-013-1805-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 11/05/2013] [Accepted: 12/15/2013] [Indexed: 02/02/2023]
Affiliation(s)
- Anish Ghodadra
- University of Pittsburgh Medical Center, 200 Lothrop Street 3950 Presby South Tower, Pittsburgh, PA, 15213, USA,
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14
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Faranesh AZ, Kellman P, Ratnayaka K, Lederman RJ. Integration of cardiac and respiratory motion into MRI roadmaps fused with x-ray. Med Phys 2013; 40:032302. [PMID: 23464334 DOI: 10.1118/1.4789919] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
PURPOSE Volumetric roadmaps overlaid on live x-ray fluoroscopy may be used to enhance image guidance during interventional procedures. These roadmaps are often static and do not reflect cardiac or respiratory motion. In this work, the authors present a method for integrating cardiac and respiratory motion into magnetic resonance imaging (MRI)-derived roadmaps to fuse with live x-ray fluoroscopy images, and this method was tested in large animals. METHODS Real-time MR images were used to capture cardiac and respiratory motion. Nonrigid registration was used to calculate motion fields to deform a reference end-expiration, end-diastolic image to different cardiac and respiratory phases. These motion fields were fit to separate affine motion models for the aorta and proximal right coronary artery. Under x-ray fluoroscopy, an image-based navigator and ECG signal were used as inputs to deform the roadmap for live overlay. The in vivo accuracy of motion correction was measured in four swine as the ventilator tidal volume was varied. RESULTS Motion correction reduced the root-mean-square error between the roadmaps and manually drawn centerlines, even under high tidal volume conditions. For the aorta, the error was reduced from 2.4 ± 1.5 mm to 2.2 ± 1.5 mm (p < 0.05). For the proximal right coronary artery, the error was reduced from 8.8 ± 16.2 mm to 4.3 ± 5.2 mm (p < 0.001). Using real-time MRI and an affine motion model it is feasible to incorporate physiological cardiac and respiratory motion into MRI-derived roadmaps to provide enhanced image guidance for interventional procedures. CONCLUSIONS A method has been presented for creating dynamic 3D roadmaps that incorporate cardiac and respiratory motion. These roadmaps can be overlaid on live X-ray fluoroscopy to enhance image guidance for cardiac interventions.
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Affiliation(s)
- Anthony Z Faranesh
- Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-1538, USA.
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15
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Aboulhosn J. Rotational angiography and 3D overlay in transcatheter congenital interventions. Interv Cardiol 2013. [DOI: 10.2217/ica.13.30] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Harmouche R, Cheriet F, Labelle H, Dansereau J. 3D registration of MR and X-ray spine images using an articulated model. Comput Med Imaging Graph 2012; 36:410-8. [DOI: 10.1016/j.compmedimag.2012.03.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 02/24/2012] [Accepted: 03/07/2012] [Indexed: 11/28/2022]
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Garnov N, Thormer G, Trampel R, Grunder W, Kahn T, Moche M, Busse H. Suitability of miniature inductively coupled RF coils as MR-visible markers for clinical purposes. Med Phys 2012; 38:6327-35. [PMID: 22047397 DOI: 10.1118/1.3655027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE MR-visible markers have already been used for various purposes such as image registration, motion detection, and device tracking. Inductively coupled RF (ICRF) coils, in particular, provide a high contrast and do not require connecting wires to the scanner, which makes their application highly flexible and safe. This work aims to thoroughly characterize the MR signals of such ICRF markers under various conditions with a special emphasis on fully automatic detection. METHODS The small markers consisted of a solenoid coil that was wound around a glass tube containing the MR signal source and tuned to the resonance frequency of a 1.5 T MRI. Marker imaging was performed with a spoiled gradient echo sequence (FLASH) and a balanced steady-state free precession (SSFP) sequence (TrueFISP) in three standard projections. The signal intensities of the markers were recorded for both pulse sequences, three source materials (tap water, distilled water, and contrast agent solution), different flip angles and coil alignments with respect to the B(0) direction as well as for different marker positions in the entire imaging volume (field of view, FOV). Heating of the ICRF coils was measured during 10-min RF expositions to three conventional pulse sequences. Clinical utility of the markers was assessed from their performance in computer-aided detection and in defining double oblique scan planes. RESULTS For almost the entire FOV (±215 mm) and an estimated 82% of all possible RF coil alignments with respect to B(0), the ICRF markers generated clearly visible MR signals and could be reliably localized over a large range of flip angles, in particular with the TrueFISP sequence (0.3°-4.0°). Generally, TrueFISP provided a higher marker contrast than FLASH. RF exposition caused a moderate heating (≤5 °C) of the ICRF coils only. CONCLUSIONS Small ICRF coils, imaged at low flip angles with a balanced SSFP sequence showed an excellent performance under a variety of experimental conditions and therefore make for a reliable, compact, flexible, and relatively safe marker for clinical use.
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Affiliation(s)
- Nikita Garnov
- Department of Diagnostic and Interventional Radiology, Leipzig University Hospital, Leipzig, Germany
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