1. Articles from Emon Heidari

    1-4 of 4
    1. The effect of melanin on in vivo optical coherence tomography of the skin in a multiethnic cohort

      The effect of melanin on in vivo optical coherence tomography of the skin in a multiethnic cohort

      Background Noninvasive real‐time assessment of living tissue is quickly becoming invaluable for bolstering histologic and dermatoscopic measures of cutaneous conditions. While many skin researchers have explored the utility of noninvasive imaging in inflammatory and malignant skin conditions, there is yet to be a definitive and direct assessment of the effects of melanin on the quality of optical coherence tomography (OCT) imaging and its accuracy in multiethnic patient populations. We conducted a study to evaluate the effects of melanin on the quality of in vivo OCT imaging. Methods Volunteers of all Fitzpatrick skin types were imaged once in five skin ...

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    2. Intra-operative point-of-procedure delineation of oral cancer margins using optical coherence tomography

      Intra-operative point-of-procedure delineation of oral cancer margins using optical coherence tomography

      Objectives Surgical margin status is a significant determinant of treatment outcome in oral cancer. Negative surgical margins can decrease the loco-regional recurrence by five-fold. The current standard of care of intraoperative clinical examination supplemented by histological frozen section, can result in a risk of positive margins from 5 to 17 percent. In this study, we attempted to assess the utility of intraoperative optical coherence tomography (OCT) imaging with automated diagnostic algorithm to improve on the current method of clinical evaluation of surgical margin in oral cancer. Materials and methods We have used a modified handheld OCT device with automated algorithm ...

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    3. Deep imaging in highly scattering media by combining reflection matrix measurement with Bessel-like beam based optical coherence tomography

      Deep imaging in highly scattering media by combining reflection matrix measurement with Bessel-like beam based optical coherence tomography

      Multiple scattering in biomedical tissue limits the imaging depth within a range of 1–2 mm for conventional optical imaging techniques. To extend the imaging depth into the scattering medium, a computational method based on the reflection matrix measurement has been developed to retrieve the singly back-scattered signal light from the dominant detrimental multiple-scattered background. After applying singular value decomposition on the measured matrix in the post-process, the target image underneath the turbid media is clearly recovered. To increase the depth of focus of the incident light by elongating the focal spot along the optical axis, a digital grating pattern ...

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    4. Intravascular Optical Coherence Tomography for Characterization of Atherosclerosis with a 1.7 Micron Swept-Source Laser

      Intravascular Optical Coherence Tomography for Characterization of Atherosclerosis with a 1.7 Micron Swept-Source Laser

      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 ...

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) UC Irvine
    2. (4 articles) Zhongping Chen
    3. (2 articles) Yan Li
    4. (2 articles) Jiang Zhu
    5. (1 articles) Petra E. Wilder-Smith
    6. (1 articles) Joseph C. Jing
    7. (1 articles) Stanford University
    8. (1 articles) University of Lübeck
    9. (1 articles) Peking University
    10. (1 articles) Devers Eye Institute
    11. (1 articles) Chinese Academy of Sciences
    12. (1 articles) UC Riverside
    13. (1 articles) University of Heidelberg
    14. (1 articles) Yalin Zheng
    15. (1 articles) Jeffrey M. Liebmann
    16. (1 articles) Yi Wang
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    Intravascular Optical Coherence Tomography for Characterization of Atherosclerosis with a 1.7 Micron Swept-Source Laser Deep imaging in highly scattering media by combining reflection matrix measurement with Bessel-like beam based optical coherence tomography Intra-operative point-of-procedure delineation of oral cancer margins using optical coherence tomography The effect of melanin on in vivo optical coherence tomography of the skin in a multiethnic cohort Chalcogenide-glass polarization-maintaining photonic crystal fiber for mid-infrared supercontinuum generation Supervised machine learning based multi-task artificial intelligence classification of retinopathies OCT-Detected Optic Nerve Head Neural Canal Direction, Obliqueness and Minimum Cross-Sectional Area in Healthy Eyes Combined intracoronary assessment and treatment of a patient with coronary plaque rapid progression prior to acute myocardial infarction A case report Quantifying microstructural changes in retinitis pigmentosa using spectral domain – optical coherence tomography Photothermal Optical Coherence Tomography of Anti-Angiogenic Treatment in the Mouse Retina Using Gold Nanorods as Contrast Agents Simple and robust calibration procedure for k-linearization and dispersion compensation in optical coherence tomography Optical coherence tomography in varying aetiologies of renal artery stenosis: a case series