Articles that mention Hiroshi Mashimo -Optical Coherence Tomography News

Hiroshi Mashimo

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1. Mentioned In 29 Articles
2. Endoscopic forward-viewing optical coherence tomography and angiography with MHz swept source
  
  Explore OSA | OSA Publishing Aug 9 2017 Gastroenterology , Probes
  
  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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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
3. Assessment of the radiofrequency ablation dynamics of esophageal tissue with optical coherence tomography
  
  Explore SPIE | Journal Jul 10 2017 Gastroenterology
  
  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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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Harvard University
4. Endoscopic optical coherence tomography angiography microvascular features associated with dysplasia in Barrett's esophagus: a pilot study (with video)
  
  Explore Elsevier Health Feb 3 2017 Gastroenterology , Oncology
  
  Background and Aims Angiogenesis is associated with neoplastic progression of Barretts esophagus (BE). Volumetric optical coherence tomography angiography (OCTA) visualizes subsurface microvasculature without exogenous contrast agents. We investigated the association of OCTA microvascular features with low-grade dysplasia (LGD) and high-grade dysplasia (HGD). Methods Fifty-two patients undergoing BE surveillance or endoscopic eradication therapies for dysplasia were imaged using volumetric OCTA and corresponding histological diagnoses obtained, to yield 97 data sets (non-dysplastic ...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
5. Depth-resolved imaging of colon tumor using optical coherence tomography and fluorescence laminar optical tomography
  
  Explore OSA | OSA Publishing Dec 27 2016 Gastroenterology
  
  Early detection of neoplastic changes remains a critical challenge in clinical cancer diagnosis and treatment. Many cancers arise from epithelial layers such as those of the gastrointestinal (GI) tract. Current standard endoscopic technology is difficult to detect the subsurface lesions. In this research, we investigated the feasibility of a novel multi-modal optical imaging approach including high-resolution optical coherence tomography (OCT) and high-sensitivity fluorescence laminar optical tomography (FLOT) for structural and ...
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  Mentions: University of Maryland University of Rochester Harvard University
6. Volumetric Mapping of Barrett’s Esophagus and Dysplasia With en face Optical Coherence Tomography Tethered Capsule
  
  Explore Nature Publishing Group Nov 9 2016 Gastroenterology
  
  To the Editor: Dysplasia in Barretts Esophagus (BE) is patchy ( 1 ) and sometimes missed by random biopsies. Optical coherence tomography (OCT) can image large areas of the esophagus; however, slow imaging speeds in earlier studies limited visualization to cross-sections. Cross-sectional OCT detected high-grade dysplasia with sensitivity / specificity of ~80 % ( 2 , 3 ). Tethered OCT capsules were demonstrated for cross-sectional imaging in unsedated screening to detect BE ( 4 , 5 ). Our group recently ...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
7. Circumferential optical coherence tomography angiography imaging of the swine esophagus using a micromotor balloon catheter
  
  Explore OSA | OSA Publishing Jul 5 2016 Gastroenterology , Probes
  
  We demonstrate a micromotor balloon imaging catheter for ultrahigh speed endoscopic optical coherence tomography (OCT) which provides wide area, circumferential structural and angiographic imaging of the esophagus without contrast agents. Using a 1310 nm MEMS tunable wavelength swept VCSEL light source, the system has a 1.2 MHz A-scan rate and ~8.5 m axial resolution in tissue. The micromotor balloon catheter enables circumferential imaging of the esophagus at 240 ...
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  Mentions: Brigham and Women’s Hospital Massachusetts Institute of Technology James G. Fujimoto
8. Feature Of The Week 03/08/2015: Endoscopic Optical Coherence Angiography Enables Three Dimensional Visualization of Subsurface Microvasculature
  
  Explore Optical Coherence Tomography News Mar 7 2015 Gastroenterology
  
  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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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
9. Ultrahigh speed en face OCT capsule for endoscopic imaging
  
  Explore OSA | OSA Publishing Mar 5 2015 Gastroenterology , Probes
  
  Depth resolved anden faceOCT visualizationin vivomay have important clinical applications in endoscopy. We demonstrate a high speed, two-dimensional (2D) distal scanning capsule with a micromotor for fast rotary scanning and a pneumatic actuator for precision longitudinal scanning. Longitudinal position measurement and image registration were performed by optical tracking of the pneumatic scanner. The 2D scanning device enables high resolution imaging over a small field of view and is suitable for ...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
10. Endoscopic Optical Coherence Angiography Enables Three Dimensional Visualization of Subsurface Microvasculature
  
  Explore Gastroenterology Dec 1 2014 Gastroenterology
  
  Endoscopic imaging technologies such as confocal laser endomicroscopy1and narrow band imaging (NBI)2have been used to investigate vascular changes as hallmarks of early cancer in the gastrointestinal tract. However, the limited frame rate and field of view make confocal laser endomicroscopy 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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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
11. Ultrahigh speed endoscopic optical coherence tomography for gastroenterology
  
  Explore opticsinfobase.org Nov 29 2014 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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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
12. Correction of rotational distortion for catheter-based en face OCT and OCT angiography
  
  Explore opticsinfobase.org Oct 10 2014
  
  ...Chieh Lee,^1 Michael G. Giacomelli,^1 Zhao Wang,^1 Kaicheng Liang,^1 Tsung-Han Tsai,^1 Benjamin Potsaid,^1,^2 Hiroshi Mashimo,^3,^4 and James G. Fujimoto^1,^* ^1Department of Electrical Engineering and Computer Science...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
13. Endoscopy for diagnosis and treatment in esophageal cancers: high-technology assessment
  
  Explore Wiley Online Library Oct 1 2014 Gastroenterology
  
  ... cancers: high-technology assessment 1. Junichi Akiyama^1, 2. Srinadh Komanduri^2, 3. Vani J.A. Konda^3, 4. Hiroshi Mashimo^4, 5. Sabrena Noria^5 and 6. George Triadafilopoulos^6 Article first published online: 29 SE...
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  Mentions: Harvard University Northwestern University Hiroshi Mashimo
14. Endoscopic Optical Coherence Angiography Enables 3-Dimensional Visualization of Subsurface Microvasculature
  
  Explore Gastroenterology Aug 26 2014 Gastroenterology
  
  Endoscopic imaging technologies such as confocal laser endomicroscopy 1 and narrow band imaging (NBI) 2 have been used to investigate vascular changes as hallmarks of early cancer in the gastrointestinal tract. However, the limited frame rate and field of view make confocal laser endomicroscopy 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 ...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
15. Endoscopic Optical Coherence Tomography for Clinical Gastroenterology
  
  Explore MDPI Open Access Journals Platform May 10 2014 Gastroenterology
  
  ...erence Tomography for Clinical Gastroenterology Tsung-Han Tsai^ 1^ email , James G. Fujimoto^ 1^ email and Hiroshi Mashimo^ 2,* ^email + Authors' affiliations ^1 Department of Electrical Engineering and Computer Scien...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Harvard University
16. Ultrahigh speed endoscopic swept source optical coherence tomography using a VCSEL light source and micromotor catheter
  
  Explore Conference Proceedings Mar 8 2014 Gastroenterology
  
  ...uankai K. Tao ; Vijaysekhar Jayaraman ; Martin F. Kraus ; Joachim Hornegger ; Marisa Figueiredo ; Qin Huang ; Hiroshi Mashimo ; Alex E. Cable ; James G. Fujimoto; Ultrahigh speed endoscopic swept source optical coherence...
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  Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs
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