1. Articles mentioning both Tsung-Han Tsai and Hsiang-Chieh Lee

    1-19 of 19
    1. Endoscopic forward-viewing optical coherence tomography and angiography with MHz swept source

      Endoscopic forward-viewing optical coherence tomography and angiography with MHz swept source
      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 m field of view and 5 m transverse resolution, imaging at 1 MHz axial scan rate in the human gastrointestinal tract. The probe ...
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    2. Assessment of the radiofrequency ablation dynamics of esophageal tissue with optical coherence tomography

      Assessment of the radiofrequency ablation dynamics of esophageal tissue with optical coherence tomography
      Radiofrequency ablation (RFA) is widely used for the eradication of dysplasia and the treatment of early stage esophageal carcinoma in patients with Barretts esophagus (BE). However, there are several factors, such as variation of BE epithelium (EP) thickness among individual patients and varying RFA catheter-tissue contact, which may compromise RFA efficacy. We used a high-speed optical coherence tomography (OCT) system to identify and monitor changes in the esophageal tissue architecture ...
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    3. Feature Of The Week 03/08/2015: Endoscopic Optical Coherence Angiography Enables Three Dimensional Visualization of Subsurface Microvasculature

      Feature Of The Week 03/08/2015: Endoscopic Optical Coherence Angiography Enables Three Dimensional Visualization of Subsurface Microvasculature
      Endoscopic imaging technologies such as confocal laser endomicroscopy (CLE) and narrowband imaging (NBI) have been used to investigate vascular changes as hallmarks of early cancer in the GI tract. However, the limited frame rate and field of view make CLE imaging sensitive to motion artifacts, whereas NBI has limited resolution and visualizes only the surface vascular pattern. Endoscopic optical coherence tomography (OCT) enables high speed volumetric imaging of subsurface features ...
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    4. Ultrahigh speed endoscopic optical coherence tomography for gastroenterology

      Ultrahigh speed endoscopic optical coherence tomography for gastroenterology
      We describe an ultrahigh speed endoscopic swept source optical coherence tomography (OCT) system for clinical gastroenterology using a vertical-cavity surface-emitting laser (VCSEL) and micromotor imaging catheter. The system had a 600 kHz axial scan rate and 8 m axial resolution in tissue. Imaging was performed with a 3.2 mm diameter imaging catheter at 400 frames per second with a 12 m spot size. Three-dimensional OCT (3D-OCT) imaging was performed ...
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    5. Ultrahigh speed endoscopic swept source optical coherence tomography using a VCSEL light source and micromotor catheter

      Ultrahigh speed endoscopic swept source optical coherence tomography using a VCSEL light source and micromotor catheter
      ...al coherence tomography using a VCSEL light source and micromotor catheter Tsung-Han Tsai ; Osman O. Ahsen ; Hsiang-Chieh Lee ; Kaicheng Liang ; Michael G. Giacomelli ; Benjamin M. Potsaid ; Yuankai K. Tao ; Vijaysekhar...
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    6. Structural markers observed with endoscopic 3-dimensional optical coherence tomography correlating with Barrett's esophagus radiofrequency ablation treatment response (with videos)

      Structural markers observed with endoscopic 3-dimensional optical coherence tomography correlating with Barrett's esophagus radiofrequency ablation treatment response (with videos)
      ...mputer Science, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, USA , * Hsiang-Chieh Lee, MS Affiliations + Department of Electrical Engineering & Computer Science, Research Laborato...
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    7. Comparison of Tissue Architectural Changes between Radiofrequency Ablation and Cryospray Ablation in Barrett’s Esophagus Using Endoscopic Three-Dimensional Optical Coherence Tomography

      Comparison of Tissue Architectural Changes between Radiofrequency Ablation and Cryospray Ablation in Barrett’s Esophagus Using Endoscopic Three-Dimensional Optical Coherence Tomography
      Two main nonsurgical endoscopic approaches for ablating dysplastic and early cancer lesions in the esophagus have gained popularity, namely, radiofrequency ablation (RFA) and cryospray ablation (CSA). We report a uniquely suited endoscopic and near-microscopic imaging modality, three-dimensional (3D) optical coherence tomography (OCT), to assess and compare the esophagus immediately after RFA and CSA. The maximum depths of architectural changes were measured and compared between the two treatment groups. RFA was ...
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    8. Characterization of buried glands before and after radiofrequency ablation by using 3-dimensional optical coherence tomography (with videos)

      Characterization of buried glands before and after radiofrequency ablation by using 3-dimensional optical coherence tomography (with videos)
      Background: Radiofrequency ablation (RFA) is an endoscopic technique used to eradicate Barrett's esophagus (BE). However, such ablation can commonly lead to neosquamous epithelium overlying residual BE glands not visible by conventional endoscopy and may evade detection on random biopsy samples.Objective: To demonstrate the capability of endoscopic 3-dimensional optical coherence tomography (3D-OCT) for the identification and characterization of buried glands before and after RFA therapy.Design: Cross-sectional study.Setting ...
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    9. Integrated Optical Coherence Tomography and Microscopy for Ex Vivo Multiscale Evaluation of Human Breast Tissues

      Integrated Optical Coherence Tomography and Microscopy for Ex Vivo Multiscale Evaluation of Human Breast Tissues
      3D tissue imaging methods are expected to improve surgical management of cancer. In this study, we examined the feasibility of two 3D imaging technologies, optical coherence tomography (OCT) and optical coherence microscopy (OCM), to view human breast specimens based on intrinsic optical contrast. Specifically, we imaged 44 ex vivo breast specimens including 34 benign and 10 malignant lesions with an integrated OCT and OCM system developed in our laboratory. The ...
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    10. Features of Sub-Epithelial Glandular Structures on Three-Dimensional Endoscopic Optical Coherence Tomography (3D-EOCT) After Endoscopic Mucosal Ablation

      Features of Sub-Epithelial Glandular Structures on Three-Dimensional Endoscopic Optical Coherence Tomography (3D-EOCT) After Endoscopic Mucosal Ablation
      ...aphy (3D-EOCT) After Endoscopic Mucosal Ablation Walter W. Chan, Desmond C. Adler, Chao Zhou, Tsung-Han Tsai, Hsiang-Chieh Lee, Qin Huang, Joseph M. Schmitt, James G. Fujimoto, Hiroshi Mashimo No abstract is available. T...
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    11. Integrated optical coherence tomography and optical coherence microscopy imaging of human pathology

      Integrated optical coherence tomography and optical coherence microscopy imaging of human pathology
      ...erence Chairs: Jose-Angel Conchello, Carol J. Cogswell, Tony Wilson, Thomas G. Brown ABSTRACT REFERENCES (24) Hsiang-Chieh Lee and Chao Zhou Massachusetts Institute of Technology (USA) Yihong Wang Beth Israel Deaconess M...
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    12. 1-19 of 19
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      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
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      Jobs & Studentships, Student Theses, Textbooks
  2. Organizations in the News

    1. (19 articles) Massachusetts Institute of Technology
    2. (12 articles) Harvard University
    3. (3 articles) Beth Israel Deaconess Medical Center
    4. (1 articles) Johns Hopkins University
    5. (1 articles) Tsinghua University
    6. (1 articles) University of Erlangen
  3. People in the News

    1. (19 articles) James G. Fujimoto
    2. (14 articles) Hiroshi Mashimo
    3. (11 articles) Osman O. Ahsen
    4. (10 articles) Chao Zhou
    5. (8 articles) Desmond C. Adler
    6. (8 articles) Yuankai K. Tao
    7. (7 articles) Joseph M. Schmitt
    8. (7 articles) Benjamin M. Potsaid
    9. (6 articles) Vijay Jayaraman
    10. (5 articles) Alex E. Cable
    11. (3 articles) James L. Connolly
    12. (2 articles) Zhao Wang
  4. OCT Companies in the News

    1. (8 articles) Abbot
    2. (7 articles) Thorlabs
    3. (6 articles) Praevium Research