نتایج جستجو برای: conventional imaging

تعداد نتایج: 695223  

Journal: :journal of dentistry, tehran university of medical sciences 0
mahkameh moshfeghi assistant professor, department of oral and maxillofacial radiology, dental school, shahid beheshti university of medical science, tehran, iran. soodabeh sadat sajadi sepideh sajadi majid shahbazian

successful endodontic therapy depends on adequate mechanical and chemical debridement of the canal which requires knowledge of the canal morphology. conventional radiography has been used to evaluate the canal type; however, direct digital radiography has recently been practiced for this purpose due to the shortcomings of conventional radiography. the aim of the present study was to compare the...

Journal: :AJNR. American journal of neuroradiology 2017
A Hagiwara M Hori K Yokoyama M Y Takemura C Andica T Tabata K Kamagata M Suzuki K K Kumamaru M Nakazawa N Takano H Kawasaki N Hamasaki A Kunimatsu S Aoki

BACKGROUND AND PURPOSE Synthetic MR imaging enables the creation of various contrast-weighted images including double inversion recovery and phase-sensitive inversion recovery from a single MR imaging quantification scan. Here, we assessed whether synthetic MR imaging is suitable for detecting MS plaques. MATERIALS AND METHODS Quantitative and conventional MR imaging data on 12 patients with ...

Journal: :Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2007
Benoît Mesurolle Tarek Helou Mona El-Khoury Michael Edwardes Elizabeth J Sutton Ellen Kao

OBJECTIVE The purpose of this study was to evaluate different sonographic settings (tissue harmonic, frequency compounding, and conventional imaging) and to determine which setting optimizes breast lesion detection and lesion characterization. METHODS Four hundred thirteen consecutive breast lesions (249 benign and 164 malignant) were evaluated by sonography using 4 different modes (conventio...

2017
Shewei Dou Yan Bai Ankit Shandil Degang Ding Dapeng Shi E Mark Haacke Meiyun Wang

Prostate cancer and prostatic calcifications have a high incidence in elderly men. We aimed to investigate the diagnostic capabilities of susceptibility-weighted imaging in detecting prostate cancer and prostatic calcifications. A total number of 156 men, including 34 with prostate cancer and 122 with benign prostate were enrolled in this study. Computed tomography, conventional magnetic resona...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده فیزیک 1384

در این پایان نامه به بررسی کمی یک سیستم تصویربرداری پراش افزوده(diffraction enhanced imaging-dei) پرداخته ایم. بدین منظور مشخصات توان و شار و نحوه توزیع پرتوهای سینکروترون مورد بررسی قرار داده و سپس محاسبات پرتو خط بیم(national synchrotron light source) nsls شامل رزولوشن انرژی و شار رسیده به نمونه را انجام دادیم و در نهایت با ارائه یک مدل برای سیستم dei میزان بهبود کنتراست تصویر در این سیستم نس...

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