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Goshtasbi K, Su E, Jing JC, Nguyen TV, Hong EM, Dilley KD, Ahuja GS, Chen Z, Wong BJF. Long-range optical coherence tomography of pediatric airway during drug induced sleep endoscopy: A preliminary report. Int J Pediatr Otorhinolaryngol 2024; 178:111900. [PMID: 38408413 DOI: 10.1016/j.ijporl.2024.111900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/17/2024] [Accepted: 02/21/2024] [Indexed: 02/28/2024]
Abstract
OBJECTIVE Drug induced sleep endoscopy (DISE) is often performed for pediatric obstructive sleep apnea (OSA) when initial diagnostic studies do not provide adequate information for therapy. However, DISE scoring is subjective and with limitations. This proof-of-concept study demonstrates the use of a novel long-range optical coherence tomography (LR-OCT) system during DISE of two pediatric patients. METHODS LR-OCT was used to visualize the airway of pediatric patients during DISE. At the conclusion of DISE, the OCT probe was guided in the airway under endoscopic visual guidance, and cross-sectional images were acquired at the four VOTE locations. Data processing involved image resizing and alignment, followed by rendering of three-dimensional (3D) volumetric models of the airways. RESULTS Two patients were included in this study. Patient one had 18.4%, 20.9%, 72.3%, and 97.3% maximal obstruction at velum, oropharynx, tongue base, and epiglottis, while patient two had 40.2%, 41.4%, 8.0%, and 17.5% maximal obstruction at these regions, respectively. Three-dimensional reconstructions of patients' airways were also constructed from the OCT images. CONCLUSION This proof-of-concept study demonstrates the successful evaluation of pediatric airway during DISE using LR-OCT, which accurately identified sites and degrees of obstruction with respective 3D airway reconstruction.
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Affiliation(s)
- Khodayar Goshtasbi
- Department of Otolaryngology-Head and Neck Surgery, University of California Irvine, Irvine, CA, USA; Beckman Laser Institute, University of California Irvine, Irvine, CA, USA
| | - Erica Su
- Beckman Laser Institute, University of California Irvine, Irvine, CA, USA
| | - Joseph C Jing
- Beckman Laser Institute, University of California Irvine, Irvine, CA, USA
| | - Theodore V Nguyen
- Beckman Laser Institute, University of California Irvine, Irvine, CA, USA
| | - Ellen M Hong
- Beckman Laser Institute, University of California Irvine, Irvine, CA, USA
| | - Katelyn D Dilley
- Beckman Laser Institute, University of California Irvine, Irvine, CA, USA
| | - Gurpreet S Ahuja
- Division of Pediatric Otolaryngology, Children's Hospital of Orange County, Orange, CA, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California Irvine, Irvine, CA, USA; School of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
| | - Brian J F Wong
- Department of Otolaryngology-Head and Neck Surgery, University of California Irvine, Irvine, CA, USA; Beckman Laser Institute, University of California Irvine, Irvine, CA, USA; School of Biomedical Engineering, University of California Irvine, Irvine, CA, USA.
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2
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Xia T, Umezu K, Scully DM, Wang S, Larina IV. In vivo volumetric depth-resolved imaging of cilia metachronal waves using dynamic optical coherence tomography. OPTICA 2023; 10:1439-1451. [PMID: 38665775 PMCID: PMC11044847 DOI: 10.1364/optica.499927] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/21/2023] [Indexed: 04/28/2024]
Abstract
Motile cilia are dynamic hair-like structures covering epithelial surfaces in multiple organs. The periodic coordinated beating of cilia creates waves propagating along the surface, known as the metachronal waves, which transport fluids and mucus along the epithelium. Motile ciliopathies result from disrupted coordinated cilia beating and are associated with serious clinical complications, including reproductive disorders. Despite the recognized clinical significance, research of cilia dynamics is extremely limited. Here, we present quantitative imaging of cilia metachronal waves volumetrically through tissue layers using dynamic optical coherence tomography (OCT). Our method relies on spatiotemporal mapping of the phase of intensity fluctuations in OCT images caused by the ciliary beating. We validated our new method ex vivo and implemented it in vivo to visualize cilia metachronal wave propagation within the mouse fallopian tube. This method can be extended to the assessment of physiological cilia function and ciliary dyskinesias in various organ systems, contributing to better management of pathologies associated with motile ciliopathies.
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Affiliation(s)
- Tian Xia
- Department of Integrative Physiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Kohei Umezu
- Department of Integrative Physiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Deirdre M. Scully
- Department of Integrative Physiology, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Shang Wang
- Department of Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
| | - Irina V. Larina
- Department of Integrative Physiology, Baylor College of Medicine, Houston, Texas 77030, USA
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3
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Zhuang Z, Chen D, Liang Z, Zhang S, Liu Z, Chen W, Qi L. Automatic 3D reconstruction of an anatomically correct upper airway from endoscopic long range OCT images. BIOMEDICAL OPTICS EXPRESS 2023; 14:4594-4608. [PMID: 37791278 PMCID: PMC10545183 DOI: 10.1364/boe.496812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/29/2023] [Accepted: 08/02/2023] [Indexed: 10/05/2023]
Abstract
Endoscopic airway optical coherence tomography (OCT) is a non-invasive and high resolution imaging modality for the diagnosis and analysis of airway-related diseases. During OCT imaging of the upper airway, in order to reliably characterize its 3D structure, there is a need to automatically detect the airway lumen contour, correct rotational distortion and perform 3D airway reconstruction. Based on a long-range endoscopic OCT imaging system equipped with a magnetic tracker, we present a fully automatic framework to reconstruct the 3D upper airway model with correct bending anatomy. Our method includes an automatic segmentation method for the upper airway based on dynamic programming algorithm, an automatic initial rotation angle error correction method for the detected 2D airway lumen contour, and an anatomic bending method combined with the centerline detected from the magnetically tracked imaging probe. The proposed automatic reconstruction framework is validated on experimental datasets acquired from two healthy adults. The result shows that the proposed framework allows the full automation of 3D airway reconstruction from OCT images and thus reveals its potential to improve analysis efficiency of endoscopic OCT images.
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Affiliation(s)
- Zhijian Zhuang
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- The Third People’s Hospital of Zhuhai, 166 Hezheng Rd., Xiangzhou District, Zhuhai, Guangdong, 519000, China
| | - Delang Chen
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Zhichao Liang
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Shuangyang Zhang
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Zhenyang Liu
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Wufan Chen
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Li Qi
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
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Miao Y, Sudol NT, Li Y, Chen JJ, Arthur RA, Qiu S, Jiang Y, Tadir Y, Lane F, Chen Z. Optical coherence tomography evaluation of vaginal epithelial thickness during CO 2 laser treatment: A pilot study. JOURNAL OF BIOPHOTONICS 2022; 15:e202200052. [PMID: 35860856 PMCID: PMC9633389 DOI: 10.1002/jbio.202200052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/18/2022] [Accepted: 07/19/2022] [Indexed: 05/20/2023]
Abstract
Genitourinary syndrome of menopause (GSM) negatively affects more than half of postmenopausal women. Energy-based therapy has been explored as a minimally invasive treatment for GSM; however, its mechanism of action and efficacy is controversial. Here, we report on a pilot imaging study conducted on a small group of menopause patients undergoing laser treatment. Intravaginal optical coherence tomography (OCT) endoscope was used to quantitatively monitor the changes in the vaginal epithelial thickness (VET) during fractional-pixel CO2 laser treatment. Eleven patients with natural menopause and one surgically induced menopause patient were recruited in this clinical study. Following the laser treatment, 6 out of 11 natural menopause patient showed increase in both proximal and distal VET, while two natural menopause patient showed increase in VET in only one side of vaginal tract. Furthermore, the patient group that showed increased VET had thinner baseline VET compared to the patients that showed decrease in VET after laser treatment. These results demonstrate the potential utility of intravaginal OCT endoscope in evaluating the vaginal tissue integrity and tailoring vaginal laser treatment on a per-person basis, with the potential to monitor other treatment procedures.
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Affiliation(s)
- Yusi Miao
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Neha T Sudol
- Department of Obstetrics & Gynecology, University of California, Irvine, Medical Center, Irvine, CA, USA
| | - Yan Li
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Jason J Chen
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Rebecca A. Arthur
- Department of Obstetrics & Gynecology, University of California, Irvine, Medical Center, Irvine, CA, USA
| | - Saijun Qiu
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Yuchen Jiang
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Yona Tadir
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
| | - Felicia Lane
- Department of Obstetrics & Gynecology, University of California, Irvine, Medical Center, Irvine, CA, USA
| | - Zhongping Chen
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
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Tentative study on radial endobronchial ultrasonography evaluating airway wall thickness before and after bronchial thermoplasty. Respir Med Case Rep 2022; 36:101571. [PMID: 35036303 PMCID: PMC8749159 DOI: 10.1016/j.rmcr.2021.101571] [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: 08/21/2021] [Revised: 12/13/2021] [Accepted: 12/30/2021] [Indexed: 11/24/2022] Open
Abstract
Aim We aimed to observe the clinical practicing value of radial endobronchial ultrasonography evaluating airway wall thickness before and after bronchial thermoplasty. Methods We selected two patients who received bronchial thermoplasty in our hospital. We measured the thickness of each segmental airway wall of each patient by radial endobronchial ultrasonography, and observed the difference before and after the therapy. All the treatments and measurement were performed by a designated bronchoscopist and the locations and depths of the ultrasound probe were relatively fixed, to reduce the operational error. Results In both two patients, the mean thicknesses of all segmental airway walls was 4.9 ± 0.7 mm before the first session of BT; the mean thickness was 4.13 ± 0.92 mm before the second session; the mean thickness was 2.69 ± 0.68 mm before the third session; the mean thickness was 2.7 ± 0.5 mm in the follow-up measurement at six months after the BT treatment; all thicknesses of airway wall were significantly reduced comparing with those before treatment; all the thicknesses of the airway walls were stable without any tendency of thickening after six months. Although the airways in the right middle lobe of both two patients were not received BT, their thicknesses were also decreased comparing with those before the treatment; both upper lobes bronchus of both two patients were not activated in the first and second sessions, but their thicknesses were also decreased at the third measurement. Conclusion Radial endobronchial ultrasonography is a simple and practical method to measure the thickness of patient's airway wall. Bronchial thermoplasty can effectively reduce the thickness of airway wall. It can reduce airway smooth muscle by direct activation and other possible more complicated mechanism, which need further research.
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Qi L, Zhuang Z, Zhang S, Huang S, Feng Q, Chen W. Automatic correction of the initial rotation angle error improves 3D reconstruction in endoscopic airway optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2021; 12:7616-7631. [PMID: 35003856 PMCID: PMC8713659 DOI: 10.1364/boe.439120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/11/2021] [Accepted: 10/27/2021] [Indexed: 05/11/2023]
Abstract
Endoscopic airway optical coherence tomography (OCT) is an advanced imaging modality capable of capturing the internal anatomy and geometry of the airway. Due to fiber-optic catheter bending and friction, the rotation speed of the endoscopic probe is usually non-uniform: at each B-scan image, the initial rotation angle of the probe is easily misaligned with that of the previous slices. During the pullback operation, this initial rotation angle error (IRAE) will be accumulated and will result in distortion and deformation of the reconstructed 3D airway structure. Previous attempts to correct this error were mainly manual corrections, which are time-consuming and suffered from observer variation. In this paper, we present a method to correct the IRAE for anatomically improved visualization of the airway. Our method derived the rotation angular difference of adjacent B-scans by measuring their contour similarity and then tracks the IRAE by formulating its continuous drift as a graph-based problem. The algorithm was tested on a simulated airway contour dataset, and also on experimental datasets acquired by two different long range endoscopic airway OCT platforms. Effective and smooth compensation of the frame-by-frame initial angle difference was achieved. Our method has real-time capability and thus has the potential to improve clinical imaging efficiency.
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Affiliation(s)
- Li Qi
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- These authors contributed equally to this work
| | - Zhijian Zhuang
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- These authors contributed equally to this work
| | - Shuangyang Zhang
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Shixian Huang
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Qianjin Feng
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Wufan Chen
- School of Biomedical Engineering, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
- Guangdong Province Engineering Laboratory for Medical Imaging and Diagnostic Technology, Southern Medical University, 1023 Shatai Rd., Baiyun District, Guangzhou, Guangdong, 510515, China
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7
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Sharma GK, Chen LY, Chou L, Badger C, Hong E, Rangarajan S, Chang TH, Armstrong WB, Verma SP, Chen Z, Ramalingam R, Wong BJF. Surface kinematic and depth-resolved analysis of human vocal folds in vivo during phonation using optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210125R. [PMID: 34414705 PMCID: PMC8374544 DOI: 10.1117/1.jbo.26.8.086005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/26/2021] [Indexed: 05/30/2023]
Abstract
SIGNIFICANCE The human vocal fold (VF) oscillates in multiple vectors and consists of distinct layers with varying viscoelastic properties that contribute to the mucosal wave. Office-based and operative laryngeal endoscopy are limited to diagnostic evaluation of the VF epithelial surface only and are restricted to axial-plane characterization of the horizontal mucosal wave. As such, understanding of the biomechanics of human VF motion remains limited. AIM Optical coherence tomography (OCT) is a micrometer-resolution, high-speed endoscopic imaging modality which acquires cross-sectional images of tissue. Our study aimed to leverage OCT technology and develop quantitative methods for analyzing the anatomy and kinematics of in vivo VF motion in the coronal plane. APPROACH A custom handheld laryngeal stage was used to capture OCT images with 800 A-lines at 250 Hz. Automated image postprocessing and analytical methods were developed. RESULTS Novel kinematic analysis of in vivo, long-range OCT imaging of the vibrating VF in awake human subjects is reported. Cross-sectional, coronal-plane panoramic videos of the larynx during phonation are presented with three-dimensional videokymographic and space-time velocity analysis of VF motion. CONCLUSIONS Long-range OCT with automated computational methods allows for cross-sectional dynamic laryngeal imaging and has the potential to broaden our understanding of human VF biomechanics and sound production.
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Affiliation(s)
- Giriraj K. Sharma
- University of California, Irvine Medical Center, Department of Otolaryngology–Head and Neck Surgery, Irvine, California, United States
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Lily Y. Chen
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | - Lidek Chou
- OCT Medical Imaging, Inc., Irvine, California, United States
| | - Christopher Badger
- University of California, Irvine, School of Medicine, Irvine, California, United States
| | - Ellen Hong
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
| | | | | | - William B. Armstrong
- University of California, Irvine Medical Center, Department of Otolaryngology–Head and Neck Surgery, Irvine, California, United States
| | - Sunil P. Verma
- University of California, Irvine Medical Center, Department of Otolaryngology–Head and Neck Surgery, Irvine, California, United States
| | - Zhongping Chen
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
- University of California, Irvine, Department of Biomedical Engineering, Irvine, California, United States
| | - Ram Ramalingam
- OCT Medical Imaging, Inc., Irvine, California, United States
| | - Brian J.-F. Wong
- University of California, Irvine Medical Center, Department of Otolaryngology–Head and Neck Surgery, Irvine, California, United States
- University of California, Irvine, Beckman Laser Institute and Medical Clinic, Irvine, California, United States
- University of California, Irvine, Department of Biomedical Engineering, Irvine, California, United States
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Miao Y, Jing JJ, Chen Z. Graph-based rotational nonuniformity correction for localized compliance measurement in the human nasopharynx. BIOMEDICAL OPTICS EXPRESS 2021; 12:2508-2518. [PMID: 33996244 PMCID: PMC8086476 DOI: 10.1364/boe.419997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/08/2021] [Accepted: 03/11/2021] [Indexed: 05/11/2023]
Abstract
Recent advancements in the high-speed long-range optical coherence tomography (OCT) endoscopy allow characterization of tissue compliance in the upper airway, an indicator of collapsibility. However, the resolution and accuracy of localized tissue compliance measurement are currently limited by the lack of a reliable nonuniform rotational distortion (NURD) correction method. In this study, we developed a robust 2-step NURD correction algorithm that can be applied to the dynamic OCT images obtained during the compliance measurement. We demonstrated the utility of the NURD correction algorithm by characterizing the local compliance of nasopharynx from an awake human subject for the first time.
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Affiliation(s)
- Yusi Miao
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92612, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA 92697, USA
| | - Joseph J. Jing
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92612, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92612, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA 92697, USA
- The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine, Irvine, CA 92697, USA
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9
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Rubinstein M, Hu AC, Chung PS, Kim JH, Osann KE, Schalch P, Armstrong WB, Wong BJF. Intraoperative use of optical coherence tomography to differentiate normal and diseased thyroid and parathyroid tissues from lymph node and fat. Lasers Med Sci 2020; 36:269-278. [PMID: 32337680 DOI: 10.1007/s10103-020-03024-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 04/16/2020] [Indexed: 11/25/2022]
Abstract
The purpose of this study is twofold: (1) to determine the feasibility of optical coherence tomography (OCT) to differentiate normal and diseased tissue of the neck region intraoperatively and (2) to evaluate how accurately a cohort of test subjects can identify various tissue types when shown a sample set of OCT images. In this in vivo, prospective, single institutional study, an OCT imaging system (Niris, Imalux, Cleveland, OH) was used to image parathyroid, thyroid, lymph node, and fat tissue in 76 patients during neck surgery. Biopsies were performed for comparison of OCT images with histology in select cases (n = 20). Finally, a group of either surgeons or scientists familiar with OCT (n = 17) were shown a sample of OCT images and asked to identify the tissue. A total of 437 OCT images were analyzed, and characteristic features of each tissue type were identified. OCT demonstrated distinct differences in structural architecture and signal intensity that allows differentiation between thyroid and parathyroid tissues, lymph nodes, and fat. OCT images were also compared with histology with good correlation. There was no difference in correctly identifying OCT-imaged tissue type between surgeons and scientists. This study is the first in vivo OCT imaging study to evaluate both normal and diseased tissues that may be encountered during neck surgery. OCT has the potential to become a valuable intraoperative tool to differentiate diseased and normal thyroid tissue intraoperatively to obtain an "optical biopsy" in real time without fixation, staining, or tissue resection.
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Affiliation(s)
- Marc Rubinstein
- Departement of Otolaryngology - Head and Neck Surgery, University of California Irvine, Orange, CA, USA
- Beckman Laser Institute and Medical Clinic, University of California Irvine, 1002 Health Sciences Rd, Irvine, CA, 92617, USA
| | - Allison C Hu
- Departement of Otolaryngology - Head and Neck Surgery, University of California Irvine, Orange, CA, USA
- Beckman Laser Institute and Medical Clinic, University of California Irvine, 1002 Health Sciences Rd, Irvine, CA, 92617, USA
- Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA
| | - Phil-Sang Chung
- Beckman Laser Institute Korea, Dankook University, Cheonan, South Korea
- Department of Otolaryngology - Head and Neck Surgery, College of Medicine, Dankook University, Cheonan, South Korea
| | - Jason H Kim
- Departement of Otolaryngology - Head and Neck Surgery, University of California Irvine, Orange, CA, USA
| | - Kathryn E Osann
- Department of Medicine, University of California Irvine, Orange, CA, USA
| | - Paul Schalch
- Departement of Otolaryngology - Head and Neck Surgery, University of California Irvine, Orange, CA, USA
| | - William B Armstrong
- Departement of Otolaryngology - Head and Neck Surgery, University of California Irvine, Orange, CA, USA
| | - Brian J F Wong
- Departement of Otolaryngology - Head and Neck Surgery, University of California Irvine, Orange, CA, USA.
- Beckman Laser Institute and Medical Clinic, University of California Irvine, 1002 Health Sciences Rd, Irvine, CA, 92617, USA.
- Department of Biomedical Engineering, University of California Irvine, Irvine, CA, USA.
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10
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Li R, Yin H, Hong J, Wang C, He B, Chen Z, Li Q, Xue P, Zhang X. Speckle reducing OCT using optical chopper. OPTICS EXPRESS 2020; 28:4021-4031. [PMID: 32122062 DOI: 10.1364/oe.382369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 12/23/2019] [Indexed: 06/10/2023]
Abstract
Optical coherence tomography (OCT) has been an important and powerful tool for biological research and clinical applications. However, speckle noise significantly degrades the image quality of OCT and has a negative impact on the clinical diagnosis accuracy. In this paper, we propose a novel speckle noise suppression technique which changes the spatial distribution of sample beam using a special optical chopper. Then a series of OCT images with uncorrelated speckle patterns could be captured and compounded to improve the image quality without degradation of resolution. Typical signal-to-noise ratio improvement of ∼6.4 dB is experimentally achieved in tissue phantom imaging with average number n = 100. Furthermore, compared with conventional OCT, the proposed technique is demonstrated to view finer and clearer biological structures in human skin in vivo, such as sweat glands and blood vessels. The advantages of low cost, simple structure and compact integration will benefit the future design of handheld or endoscopic probe for biomedical imaging in research and clinical applications.
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11
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Feroldi F, Willemse J, Davidoiu V, Gräfe MGO, van Iperen DJ, Goorsenberg AWM, Annema JT, Daniels JMA, Bonta PI, de Boer JF. In vivo multifunctional optical coherence tomography at the periphery of the lungs. BIOMEDICAL OPTICS EXPRESS 2019; 10:3070-3091. [PMID: 31259075 PMCID: PMC6583343 DOI: 10.1364/boe.10.003070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 05/04/2023]
Abstract
Remodeling of tissue, such as airway smooth muscle (ASM) and extracellular matrix, is considered a key feature of airways disease. No clinically accepted diagnostic method is currently available to assess airway remodeling or the effect of treatment modalities such as bronchial thermoplasty in asthma, other than invasive airway biopsies. Optical coherence tomography (OCT) generates cross-sectional, near-histological images of airway segments and enables identification and quantification of airway wall layers based on light scattering properties only. In this study, we used a custom motorized OCT probe that combines standard and polarization sensitive OCT (PS-OCT) to visualize birefringent tissue in vivo in the airway wall of a patient with severe asthma in a minimally invasive manner. We used optic axis uniformity (OAxU) to highlight the presence of uniformly arranged fiber-like tissue, helping visualizing the abundance of ASM and connective tissue structures. Attenuation coefficient images of the airways are presented for the first time, showing superior architectural contrast compared to standard OCT images. A novel segmentation algorithm was developed to detect the surface of the endoscope sheath and the surface of the tissue. PS-OCT is an innovative imaging technique that holds promise to assess airway remodeling including ASM and connective tissue in a minimally invasive, real-time manner.
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Affiliation(s)
- Fabio Feroldi
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, de Boelelaan 1081, 1081HV, Amsterdam, the Netherlands
| | - Joy Willemse
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, de Boelelaan 1081, 1081HV, Amsterdam, the Netherlands
- These authors contributed equally
| | - Valentina Davidoiu
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, de Boelelaan 1081, 1081HV, Amsterdam, the Netherlands
- These authors contributed equally
| | - Maximilian G. O. Gräfe
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, de Boelelaan 1081, 1081HV, Amsterdam, the Netherlands
| | - Dirck J. van Iperen
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, de Boelelaan 1081, 1081HV, Amsterdam, the Netherlands
| | - Annika W. M. Goorsenberg
- Amsterdam University Medical Center, Department of Pulmonology, University of Amsterdam, Amsterdam, the Netherlands
| | - Jouke T. Annema
- Amsterdam University Medical Center, Department of Pulmonology, University of Amsterdam, Amsterdam, the Netherlands
| | - Johannes M. A. Daniels
- Amsterdam University Medical Center, Department of Pulmonology, VUmc Location, Amsterdam, the Netherlands
| | - Peter I. Bonta
- Amsterdam University Medical Center, Department of Pulmonology, University of Amsterdam, Amsterdam, the Netherlands
| | - Johannes F. de Boer
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, de Boelelaan 1081, 1081HV, Amsterdam, the Netherlands
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12
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Miao Y, Brenner M, Chen Z. Endoscopic Optical Coherence Tomography for Assessing Inhalation Airway Injury: A Technical Review. OTOLARYNGOLOGY (SUNNYVALE, CALIF.) 2019; 9:366. [PMID: 31497378 PMCID: PMC6731096 DOI: 10.4172/2161-119x.1000366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Diagnosis of inhalation injury has been clinically challenging. Currently, assessment of inhalation injury relies on subjective clinical exams and bronchoscopy, which provides little understanding of tissue conditions and results in limited prognostics. Endoscopic Optical coherence tomography (OCT) technology has been recently utilized in the airway for direct assessment of respiratory tract disorders and injuries. Endoscopic OCT is capable of capturing high-resolution images of tissue morphology 1-3 mm beneath the surface as well as the complex 3D anatomical shape. Previous studies indicate that changes in airway histopathology can be found in the OCT image almost immediately after inhalation of smoke and other toxic chemicals, which correlates well with histology and pulmonary function tests. This review summarizes the recent development of endoscopic OCT technology for airway imaging, current uses of OCT for inhalation injury, and possible future directions.
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Affiliation(s)
- Yusi Miao
- Beckman Laser Institute, University of California, Irvine, CA, USA
| | - Matthew Brenner
- Beckman Laser Institute, University of California, Irvine, CA, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, CA, USA
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13
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Qi L, Zheng K, Li X, Feng Q, Chen Z, Chen W. Automatic three-dimensional segmentation of endoscopic airway OCT images. BIOMEDICAL OPTICS EXPRESS 2019; 10:642-656. [PMID: 30800505 PMCID: PMC6377898 DOI: 10.1364/boe.10.000642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/23/2018] [Accepted: 12/24/2018] [Indexed: 05/25/2023]
Abstract
Automatic delineation and segmentation of airway structures from endoscopic optical coherence tomography (OCT) images improve image analysis efficiency and thus has been of particular interest. Conventional two-dimensional automatic segmentation methods, such as the dynamic programming approach, ensures the edge-continuity in the xz-direction (intra-B-scan), but fails to preserve the surface-continuity when concerning the y-direction (inter-B-scan). To solve this, we present a novel automatic three-dimensional (3D) airway segmentation strategy. Our segmentation scheme includes an artifact-oriented pre-processing pipeline and a modified 3D optimal graph search algorithm incorporating adaptive tissue-curvature adjustment. The proposed algorithm is tested on endoscopic airway OCT image data sets acquired by different swept-source OCT platforms, and on different animal and human models. With our method, the results show continuous surface segmentation performance, which is both robust and accurate.
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Affiliation(s)
- Li Qi
- School of Biomedical Engineering and Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Kaibin Zheng
- School of Biomedical Engineering and Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Xipan Li
- School of Biomedical Engineering and Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Qianjin Feng
- School of Biomedical Engineering and Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, Irvine, CA 92612, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA 92612, USA
- Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hangkong University, Nanchang, Jiangxi, 330063, China
| | - Wufan Chen
- School of Biomedical Engineering and Guangdong Provincial Key Laboratory of Medical Image Processing, Southern Medical University, Guangzhou, Guangdong, 510515, China
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14
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Balakrishnan S, Bu R, Iftimia N, Price H, Zdanski C, Oldenburg AL. Combined anatomical optical coherence tomography and intraluminal pressure reveal viscoelasticity of the in vivo airway. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-4. [PMID: 30350490 PMCID: PMC6259006 DOI: 10.1117/1.jbo.23.10.100501] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/25/2018] [Indexed: 05/27/2023]
Abstract
It is hypothesized that the local, viscoelastic (time-dependent) properties of the airway are important to accurately model and ultimately predict dynamic airway collapse in airway obstruction. Toward this end, we present a portable, endoscopic, swept-source anatomical optical coherence tomography (aOCT) system combined with a pressure catheter to capture local airway dynamics in vivo during respiration. aOCT scans were performed in the airways of a mechanically ventilated pig under paralysis with dynamic and static ventilation protocols. Validation of dynamic aOCT luminal cross-sectional area (CSA) measurements against Cine CT, obtained during the same exam, showed an aggregate difference of 15 % ± 3 % . aOCT-derived CSA obtained in the in vivo trachea also exhibited hysteresis as a function of pressure, depicting the viscoelastic nature of the airway wall. The volumetric imaging capabilities were validated by comparing aOCT- and CT-derived geometries of the porcine airway spanning nine generations from the trachea to the bronchioles. The ability to delineate regional differences in airway viscoelastic properties, by measuring airway deformation using aOCT combined with intraluminal pressure, paves the way to patient-specific models of dynamic airway collapse.
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Affiliation(s)
- Santosh Balakrishnan
- University of North Carolina at Chapel Hill, Department of Biomedical Engineering, Chapel Hill, North Carolina, United States
| | - Ruofei Bu
- University of North Carolina at Chapel Hill, Department of Biomedical Engineering, Chapel Hill, North Carolina, United States
| | - Nicusor Iftimia
- Physical Sciences Inc., Andover, Massachusetts, United States
| | - Hillel Price
- University of North Carolina at Chapel Hill, Department of Physics and Astronomy, Chapel Hill, North Carolina, United States
| | - Carlton Zdanski
- University of North Carolina at Chapel Hill, Department of Otolaryngology/Head and Neck Surgery, Chapel Hill, North Carolina, United States
| | - Amy L. Oldenburg
- University of North Carolina at Chapel Hill, Department of Biomedical Engineering, Chapel Hill, North Carolina, United States
- University of North Carolina at Chapel Hill, Department of Physics and Astronomy, Chapel Hill, North Carolina, United States
- University of North Carolina at Chapel Hill, Biomedical Research Imaging Center, Chapel Hill, North Carolina, United States
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15
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Kimbell JS, Basu S, Garcia GJM, Frank-Ito DO, Lazarow F, Su E, Protsenko D, Chen Z, Rhee JS, Wong BJ. Upper airway reconstruction using long-range optical coherence tomography: Effects of airway curvature on airflow resistance. Lasers Surg Med 2018; 51:150-160. [PMID: 30051633 DOI: 10.1002/lsm.23005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2018] [Indexed: 11/06/2022]
Abstract
OBJECTIVES Adenotonsillectomy (AT) is commonly used to treat upper airway obstruction in children, but selection of patients who will benefit most from AT is challenging. The need for diagnostic evaluation tools without sedation, radiation, or high costs has motivated the development of long-range optical coherence tomography (LR-OCT), providing real-time cross-sectional airway imaging during endoscopy. Since the endoscope channel location is not tracked in conventional LR-OCT, airway curvature must be estimated and may affect predicted airway resistance. The study objective was to assess effects of three realistic airway curvatures on predicted airway resistance using computational fluid dynamics (CFD) in LR-OCT reconstructions of the upper airways of pediatric patients, before and after AT. METHODS Eight subjects (five males, three females, aged 4-9 years) were imaged using LR-OCT before and after AT during sedated endoscopy. Three-dimensional (3D) airway reconstructions included three airway curvatures. Steady-state, inspiratory airflow simulations were conducted under laminar conditions, along with turbulent simulations for one subject using the k-ω turbulence model. Airway resistance (pressure drop/flow) was compared using two-tailed Wilcoxon signed rank tests. RESULTS Regardless of the airway curvatures, CFD findings corroborate a surgical end-goal with computed post-operative airway resistance significantly less than pre-operative (P < 0.01). The individual resistances did not vary significantly for different airway curvatures (P > 0.25). Resistances computed using turbulent simulations differed from laminar results by less than ∼5%. CONCLUSIONS The results suggest that reconstruction of the upper airways from LR-OCT imaging data may not need to account for airway curvature to be predictive of surgical effects on airway resistance. Lasers Surg. Med. 51:150-160, 2019. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Julia S Kimbell
- Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Saikat Basu
- Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Guilherme J M Garcia
- Otolaryngology and Communication Sciences, Medical College of Wisconsin, Milwaukee, Wisconsin.,Medical College of Wisconsin, Biotechnology and Bioengineering Center, Milwaukee, Wisconsin
| | - Dennis O Frank-Ito
- Otolaryngology-Head and Neck Surgery, Duke University Medical Center, Durham, North Carolina
| | - Frances Lazarow
- Beckman Laser Institute, University of California, Irvine, California
| | - Erica Su
- Beckman Laser Institute, University of California, Irvine, California
| | - Dimitry Protsenko
- Beckman Laser Institute, University of California, Irvine, California
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, California
| | - John S Rhee
- Otolaryngology and Communication Sciences, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Brian J Wong
- Beckman Laser Institute, University of California, Irvine, California.,Otolaryngology-Head and Neck Surgery, University of California, Irvine, California
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16
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Miao Y, Jing JC, Desai V, Mahon SB, Brenner M, Veress LA, White CW, Chen Z. Automated 3D segmentation of methyl isocyanate-exposed rat trachea using an ultra-thin, fully fiber optic optical coherence endoscopic probe. Sci Rep 2018; 8:8713. [PMID: 29880863 PMCID: PMC5992171 DOI: 10.1038/s41598-018-26389-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 05/03/2018] [Indexed: 02/06/2023] Open
Abstract
Development of effective rescue countermeasures for toxic inhalational industrial chemicals, such as methyl isocyanate (MIC), has been an emerging interest. Nonetheless, current methods for studying toxin-induced airway injuries are limited by cost, labor time, or accuracy, and only provide indirect or localized information. Optical Coherence Tomography (OCT) endoscopic probes have previously been used to visualize the 3-D airway structure. However, gathering such information in small animal models, such as rat airways after toxic gas exposure, remains a challenge due to the required probe size necessary for accessing the small, narrow, and partially obstructed tracheas. In this study, we have designed a 0.4 mm miniature endoscopic probe and investigated the structural changes in rat trachea after MIC inhalation. An automated 3D segmentation algorithm was implemented so that anatomical changes, such as tracheal lumen volume and cross-sectional areas, could be quantified. The tracheal region of rats exposed to MIC by inhalation showed significant airway narrowing, especially within the upper trachea, as a result of epithelial detachment and extravascular coagulation within the airway. This imaging and automated reconstruction technique is capable of rapid and minimally-invasive identification of airway obstruction. This method can be applied to large-scale quantitative analysis of in vivo animal models.
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Affiliation(s)
- Yusi Miao
- Beckman Laser Institute, University of California Irvine, Irvine, 92612, California, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, 92697, California, USA
| | - Joseph C Jing
- Beckman Laser Institute, University of California Irvine, Irvine, 92612, California, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, 92697, California, USA
| | - Vineet Desai
- Beckman Laser Institute, University of California Irvine, Irvine, 92612, California, USA
| | - Sari B Mahon
- Beckman Laser Institute, University of California Irvine, Irvine, 92612, California, USA
| | - Matthew Brenner
- Beckman Laser Institute, University of California Irvine, Irvine, 92612, California, USA
| | - Livia A Veress
- Department of Pediatrics, University of Colorado Denver, Denver, 80204, Colorado, USA
| | - Carl W White
- Department of Pediatrics, University of Colorado Denver, Denver, 80204, Colorado, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California Irvine, Irvine, 92612, California, USA. .,Department of Biomedical Engineering, University of California Irvine, Irvine, 92697, California, USA.
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17
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Li Y, Jing J, Heidari E, Zhu J, Qu Y, Chen Z. Intravascular Optical Coherence Tomography for Characterization of Atherosclerosis with a 1.7 Micron Swept-Source Laser. Sci Rep 2017; 7:14525. [PMID: 29109462 PMCID: PMC5674044 DOI: 10.1038/s41598-017-15326-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 10/25/2017] [Indexed: 11/17/2022] Open
Abstract
The main cause of acute coronary events, such as thrombosis, is the rupture of atherosclerotic plaques. Typical intravascular optical coherence tomography (IVOCT) imaging systems that utilize a 1.3 μm swept source laser are often used for identifying fibrous cap thickness of plaques, yet cannot provide adequate depth penetration to resolve the size of the lipid pool. Here, we present a novel IVOCT system with a 1.7 μm center wavelength swept light source that can readily penetrate deeper into the tissue because of the longer wavelength and allows for better identification of plaques due to the lipid absorption spectrum at 1.7 μm. Using this system, we have imaged a human coronary artery to evaluate the performance of the novel OCT system and verified the results by hematoxylin and eosin (H&E) histology. The significantly improved imaging depth and better identification sensitivity suggest that the 1.7 μm OCT system holds great potential that can be further translated for in-vivo applications of atherosclerosis characterization.
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Affiliation(s)
- Yan Li
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA, 92617, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, CA, 92697-2700, USA
| | - Joseph Jing
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA, 92617, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, CA, 92697-2700, USA
| | - Emon Heidari
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA, 92617, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, CA, 92697-2700, USA
| | - Jiang Zhu
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA, 92617, USA
| | - Yueqiao Qu
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA, 92617, USA.,Department of Biomedical Engineering, University of California Irvine, Irvine, CA, 92697-2700, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA, 92617, USA. .,Department of Biomedical Engineering, University of California Irvine, Irvine, CA, 92697-2700, USA.
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18
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Lee AMD, Hohert G, Angkiriwang PT, MacAulay C, Lane P. Dual-beam manually-actuated distortion-corrected imaging (DMDI) with micromotor catheters. OPTICS EXPRESS 2017; 25:22164-22177. [PMID: 29041505 DOI: 10.1364/oe.25.022164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 08/18/2017] [Indexed: 05/23/2023]
Abstract
We present a new paradigm for performing two-dimensional scanning called dual-beam manually-actuated distortion-corrected imaging (DMDI). DMDI operates by imaging the same object with two spatially-separated beams that are being mechanically scanned rapidly in one dimension with slower manual actuation along a second dimension. Registration of common features between the two imaging channels allows remapping of the images to correct for distortions due to manual actuation. We demonstrate DMDI using a 4.7 mm OD rotationally scanning dual-beam micromotor catheter (DBMC). The DBMC requires a simple, one-time calibration of the beam paths by imaging a patterned phantom. DMDI allows for distortion correction of non-uniform axial speed and rotational motion of the DBMC. We show the utility of this technique by demonstrating en face OCT image distortion correction of a manually-scanned checkerboard phantom and fingerprint scan.
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19
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Liang K, Ahsen OO, Wang Z, Lee HC, Liang W, Potsaid BM, Tsai TH, Giacomelli MG, Jayaraman V, Mashimo H, Li X, Fujimoto JG. Endoscopic forward-viewing optical coherence tomography and angiography with MHz swept source. OPTICS LETTERS 2017; 42:3193-3196. [PMID: 28809905 PMCID: PMC5875690 DOI: 10.1364/ol.42.003193] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 07/20/2017] [Indexed: 05/20/2023]
Abstract
Endoscopic optical coherence tomography (OCT) instruments are mostly side viewing and rely on at least one proximal scan, thus limiting accuracy of volumetric imaging and en face visualization. Previous forward-viewing OCT devices had limited axial scan speeds. We report a forward-viewing fiber scanning 3D-OCT probe with 900 μm field of view and 5 μm transverse resolution, imaging at 1 MHz axial scan rate in the human gastrointestinal tract. The probe is 3.3 mm diameter and 20 mm rigid length, thus enabling passage through the endoscopic channel. The scanner has 1.8 kHz resonant frequency, and each volumetric acquisition takes 0.17 s with 2 volumes/s display. 3D-OCT and angiography imaging of the colon was performed during surveillance colonoscopy.
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Affiliation(s)
- Kaicheng Liang
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Osman O. Ahsen
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Zhao Wang
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Hsiang-Chieh Lee
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Wenxuan Liang
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Benjamin M. Potsaid
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Thorlabs, Newton, New Jersey 07860, USA
| | - Tsung-Han Tsai
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Michael G. Giacomelli
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | - Hiroshi Mashimo
- Veterans Affairs Boston Healthcare System, Boston, Massachusetts 02130, USA
- Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Xingde Li
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - James G. Fujimoto
- Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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