نتایج جستجو برای: رادیوگرافی cbct

تعداد نتایج: 5866  

2013
Hyeon-Shik Hwang Kyung-Min Lee Gi-Soo Uhm Jin-Hyoung Cho James A. McNamara

OBJECTIVE The purpose of this study was to evaluate the effectiveness of the use of Reference Ear Plug (REP) during cone-beam computed tomography (CBCT) scan for the generation of lateral cephalograms from CBCT scan data. METHODS Two CBCT scans were obtained from 33 adults. One CBCT scan was acquired using conventional methods, and the other scan was acquired with the use of REP. Virtual late...

2010
Chris Beltran Atmaram S. Pai Panandiker Matthew J. Krasin Thomas E. Merchant

The purpose was to quantify the setup margin for pediatric patients with neuro-blastoma using cone beam CT imaging (CBCT) and ultrasound localization. Ten patients, with a median age of 4.3 years (1.8 to 7.9) underwent daily pretreatment localization CBCT and every other day post-treatment CBCT to calculate interfractional and intrafraction movement. Localization was based on CBCT to treatment ...

2013
Jiazhou Wang Weigang Hu Gang Cai Jiayuan Peng Ziqiang Pan Xiaomao Guo Jiayi Chen

BACKGROUND Accurate target localization is mandatory in the accelerated partial breast irradiation (APBI) delivery. Dosimetric verification for positional error will further guarantee the accuracy of treatment delivery. The purpose of this study is to evaluate the clinical feasibility of a cone beam computer tomographic (CBCT) image correction method in APBI. METHODS A CBCT image correction m...

2012
Reinhart A Sweeney Benedikt Seubert Silke Stark Vanessa Homann Gerd Müller Michael Flentje Matthias Guckenberger

BACKGROUND To analyze the accuracy and inter-observer variability of image-guidance (IG) using 3D or 4D cone-beam CT (CBCT) technology in stereotactic body radiotherapy (SBRT) for lung tumors. MATERIALS AND METHODS Twenty-one consecutive patients treated with image-guided SBRT for primary and secondary lung tumors were basis for this study. A respiration correlated 4D-CT and planning contours...

Journal: :Journal of clinical and diagnostic research : JCDR 2015
Shilpa Warhekar Sandesh Nagarajappa Prahlad L Dasar Ashish M Warhekar Ajay Parihar Tushar Phulambrikar Bhuvnesh Airen Deepika Jain

INTRODUCTION Cone beam computed tomography is a new diagnostic innovation to dental imaging. Despite the use of CBCT in oral and maxillofacial imaging, reports on its use either by individual practitioners or referral patterns to CBCT centers is lacking. Hence, a study was conducted to determine incidental findings on CBCT and reasons for referral by dental practitioners in Indore city. MATER...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1393

مقدمه: زائده استیلوئید یک زائده استخوانی مخروطی شکلی است که از استخوان تمپورال درجلوی سوراخ استیلوماستوئید جدا می شود. لیگامان استیلوهیوئید از زائده ی استیلوئید تا شاخ کوچک هیوئید ادامه دارد و به طور معمول در رادیوگرافی دیده نمی شود مگر اینکه کلسیفیه شده باشد. این مطالعه با هدف بررسی و مقایسه الگوهای کلسیفیکاسیون لیگامان استیلوهیوئید در مبتلایان به سندرم ایگل با بیماران دارای زائده استیلوئید طو...

Journal: :Biomedical journal 2013
Preetinder Singh

With reference to an excellent article published in your esteemed journal recently regarding the use of cone beam computed tomography (CBCT) for the detection of external root resorption, I would like to add some vital information on the use of CBCT in craniofacial field in the present era. CBCT allows the creation in “real time” of im‐ ages not only in the axial plane but also 2‐dimensional im...

2015
Mohan Kumar Muhammad Shanavas Ashwin Sidappa Madhu Kiran

Cone-beam computed tomography (CBCT) is an advanced imaging modality that has high clinical applications in the field of dentistry. CBCT proved to be a successful investigative modality that has been used for dental and maxillofacial imaging. Radiation exposure dose from CBCT is 10 times less than from conventional CT scans during maxillofacial exposure. Furthermore, CBCT is highly accurate and...

احمدی, نسرین, جعفری نعیمی, علیرضا, علی پناهی, مینو,

  سابقه: ریشه های فرعی، شامل اختلالات تکاملی هستند که می توانند هر دندانی را تحت تاثیر قرار دهند. شیوع آنها در حدود 68/0 درصد گزارش شده است و بیشتر کانین ها و پرمولرهای فک پایین و مولرهای هر دو فک متاثر می شوند، در حالیکه دندان های انسیزور دایمی فک پایین به ندرت توسط آنومالیهای تاج و ریشه تحت تاثیر قرار می گیرند.   گزارش مورد: آقای 17 ساله با شکایت نامرتبی دندان ها به بخش ارتودنسی، واحد دندانپز...

Journal: :Radiation Oncology (London, England) 2008
Anne Richter Qiaoqiao Hu Doreen Steglich Kurt Baier Jürgen Wilbert Matthias Guckenberger Michael Flentje

BACKGROUND To investigate the feasibility and accuracy of dose calculation in cone beam CT (CBCT) data sets. METHODS Kilovoltage CBCT images were acquired with the Elekta XVI system, CT studies generated with a conventional multi-slice CT scanner (Siemens Somatom Sensation Open) served as reference images. Material specific volumes of interest (VOI) were defined for commercial CT Phantoms (CA...

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