1. Articles from Yoshiro Naito

    1-3 of 3
    1. Impact of low tissue backscattering by optical coherence tomography on endothelial function after drug-eluting stent implantation

      Impact of low tissue backscattering by optical coherence tomography on endothelial function after drug-eluting stent implantation

      This study evaluated the impact of optical coherence tomography (OCT)-derived low-backscattered tissue on mid-term coronary endothelial function after drug-eluting stent (DES) implantation. Although OCT enables detailed in vivo evaluation of neointimal tissue characterization after DES implantation, its association with physiological vascular healing response is unclear. Thirty-three stable angina pectoris patients underwent OCT examination and endothelial function testing with intracoronary infusion of incremental doses of acetylcholine 8-month after DES implantation in a single lesion of the left anterior descending artery. Neointimal tissue was classified into two patterns based on the predominant OCT light backscatter: high backscatter and low backscatter. Although ...

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      Mentions: Kenichi Fujii
    2. Tissue Characterization of In-Stent Neointima Using Optical Coherence Tomography in the Late Phase After Bare-Metal Stent Implantation – An Ex Vivo Validation Study –

      Tissue Characterization of In-Stent Neointima Using Optical Coherence Tomography in the Late Phase After Bare-Metal Stent Implantation – An Ex Vivo Validation Study –

      Background: We performed an ex vivo study to investigate optical coherence tomography (OCT) imaging for differentiating several types of neointimal tissue during the later phases after bare-metal stent (BMS) implantation as compared with histologic results. Methods and Results: OCT imaging was performed in 6 autopsy hearts for 10 BMS with implant duration >4 years. OCT qualitative neointimal tissue characterization was based on tissue structure and classified as homogeneous pattern, heterogeneous pattern with visible struts, or heterogeneous pattern with invisible struts. Corresponding histological analyses of each 2-mm cross-section of the entire BMS were performed. Of 81 cross-sections, histological analysis revealed that ...

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      Mentions: Abbot Kenichi Fujii
    3. Accuracy of OCT, Grayscale IVUS, and Their Combination for the Diagnosis of Coronary TCFA An Ex Vivo Validation Study

      Accuracy of OCT, Grayscale IVUS, and Their Combination for the Diagnosis of Coronary TCFA An Ex Vivo Validation Study

      Objectives This study sought to assess the accuracy of optical coherence tomography (OCT), gray-scale intravascular ultrasound (IVUS), and their combination for detecting thin-cap fibroatheromas (TCFA). Background The extent to which the imaging characteristics of OCT and IVUS correlate with histologically defined TCFA is unknown. Methods IVUS and OCT examinations identified focal plaques in 165 coronary arteries from 60 autopsy hearts. A total of 685 pairs of images of OCT and IVUS were compared with histology. By OCT, a TCFA was defined as a signal-poor region with diffuse borders and cap thickness <65 μm. By IVUS, a TCFA was defined by ...

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    1-3 of 3
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    1. (3 articles) Kenichi Fujii
    2. (1 articles) Mitsumasa Ohyanagi
    3. (1 articles) Abbot
    4. (1 articles) British Columbia Cancer Agency
    5. (1 articles) Shanghai Jiao Tong University
    6. (1 articles) Singapore Eye Research Institute
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    Accuracy of OCT, Grayscale IVUS, and Their Combination for the Diagnosis of Coronary TCFA An Ex Vivo Validation Study Tissue Characterization of In-Stent Neointima Using Optical Coherence Tomography in the Late Phase After Bare-Metal Stent Implantation – An Ex Vivo Validation Study – Impact of low tissue backscattering by optical coherence tomography on endothelial function after drug-eluting stent implantation Line-field confocal optical coherence tomography-Practical applications in dermatology and comparison with established imaging methods Optical coherence tomography detection of changes in inner retinal and choroidal thicknesses in patients with early retinitis pigmentosa Feasibility of combined optical coherence tomography and autofluorescence imaging for visualization of needle biopsy placement Characterization of microvascular tortuosity in retinal vein occlusion utilizing optical coherence tomography angiography Evaluation of retinochoroidal tissues in third trimester pregnants: An optical coherence tomography angiography study Evaluation of retinal and choroidal variations in thyroid-associated ophthalmopathy using optical coherence tomography angiography OCTA Study: Retinal Vascular Changes in COVID19 Patients DIABETIC MACULAR ISCHEMIA: Correlation of Retinal Vasculature Changes by Optical Coherence Tomography Angiography and Functional Deficit OCT Risk Factors for 3-Year Development of Macular Complications in eyes with “Resolved” Chronic Central Serous Chorioretinopathy