نتایج جستجو برای: oct

تعداد نتایج: 15938  

Journal: :journal of medical signals and sensors 0
raheleh kafieh hossein rabbani saeed kermani

optical coherence tomography (oct) is a powerful imaging modality used to image various aspects of biological tissues, such as structural information, blood flow, elastic parameters, change of polarization states, and molecular content [1]. in contrast to oct technology development which has been a field of active research since 1991, oct image segmentation has only been more fully explored dur...

2012
Masashi Kakinoki Taichirou Miyake Osamu Sawada Tomoko Sawada Hajime Kawamura Masahito Ohji

Purpose. To compare the macular thicknesses in diabetic macular edema (DME) measured with spectral-domain optical coherence tomography (SD-OCT) and time-domain (TD) OCT. Patients and Methods. The average macular thicknesses of 50 eyes of 29 patients with DME were measured using SD-OCT and TD-OCT. Results. The mean macular thicknesses measured with TD-OCT and SD-OCT were 401.5 ± 117.8 μm (mean ±...

2012
Zaïnab Bentaleb-Machkour Eléonore Jouffroy Muriel Rabilloud Jean-Daniel Grange Laurent Kodjikian

PURPOSE To compare central macular thickness (CMT) measurement on healthy patient using 3 different OCT devices by two operators. METHODS Prospective, monocentricstudy. Right eye's central macular thickness (CMT) of 30 healthy patients has been measured three times using a time-domain (TD) OCT (Stratus OCT, Carl Zeiss Meditec, Dublin, Ca) and two spectral domain (SD) OCTs (Cirrus HD-OCT, Carl...

Journal: :Bioscience reports 2011
Yajuan Wang Lu Meng Hongyu Hu Ying Zhang Chenfu Zhao Qianqian Li Fangyu Shi Xudong Wang Aixing Lin

The human Oct-4 gene has three isoforms, Oct-4A, Oct-4B and Oct-4B1, which are thought to be derived from alternative splicing. It remains controversial whether the Oct-4 gene is expressed in cancer cells. Expression of Oct-4A is regulated by two elements, the PE (proximal enhancer) and DE (distal enhancer), but the expression and regulation of Oct-4B are not well known. Here, we firstly report...

Journal: :Journal of the Society for Cardiovascular Angiography & Interventions 2023

BackgroundA novel method for fast computation of Murray law-based quantitative flow ratio (μQFR) from coregistered angiography and optical coherence tomography (OCT) was recently developed. This study aimed to evaluate the diagnostic performance this OCT-modulated μQFR (OCT-μFR).MethodsPatients who underwent coronary angiography, OCT, fractional reserve (FFR) were retrospectively enrolled. comp...

ژورنال: بینا 2010
یاسری, مهدی, آرامش, شیلا, صدیق رحیم‌آبادی, مسیح, پاکروان, محمد, کریمی, سعید, یزدانی, شاهین,

هدف: این تحقیق با هدف ارزیابی ضخامت لایه فیبر عصبی شبکیه (RNFL)، به وسیله دستگاه OCT سه‌بعدی (optical coherence tomography) در یک جمعیت سالم ایرانی و مقایسه نتایج با دستگاه OCT II (نسل دوم دستگاه) صورت پذیرفت. روش پژوهش: در این مطالعه توصیفی مقطعی (cross-sectional)، 96 فرد سالم ایرانی در محدوده سنی 53-20 سال بررسی شدند. یک چشم افراد به صورت تصادفی انتخاب و ضخامت لایه فیبر عصبی شبکیه (RNFL)،...

2012
Elham Hatef Afsheen Khwaja Zubir Rentiya Mohamed Ibrahim Matthew Shulman Peykan Turkcuoglu Yasir Sepah Jianmin Wang Roomasa Channa Millena Bittencourt Abeer Akhtar Jangwon Heo Diana V. Do Quan Dong Nguyen

Purpose. To evaluate macular thickness, agreement, and intraclass repeatability in three optical coherence tomography (OCT) devices: the time domain (TD) Stratus OCT and two spectral domain (SD) OCTs, Spectralis and Cirrus SD-OCT, in eyes with macular edema secondary to diabetic retinopathy (DR) and retinal vein occlusion (VO). Methods. In a prospective observational study at a university-based...

Journal: :Contact Dermatitis 2021

Background The reason why patients photosensitized to the drug ketoprofen (KP) may develop severe photoallergic skin reactions octocrylene (OCT), an organic ultraviolet filter in sunscreens and cosmetics, remains largely unknown. OCT can be synthesized by using unsubstituted benzophenone (BP), a possible human carcinogen. Objectives To verify if, what extent, BP residues are present OCT-contain...

ژورنال: Hormozgan Medical Journal 2008
Ghorbani, S. , Kashani, E. , Lotfalizadeh, M. , Mohammadzadeh, A. , Qomian, N. ,

Introduction: Acidosis-hypoxic phenomenon is a valid indicator to determine fetal distress and is defined by measuring the blood pH of umblical cord. None of the present screening tests for evaluation of pregnant mothers have acceptable clinical accuracy to assess fetal acidosis. We decided to evaluate the relationship between fetal well being tests Non-Stress Test (NST), Oxytocin Challenge Tes...

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