نتایج جستجو برای: weighed computed tomography dose index ctdiw

تعداد نتایج: 942418  

Journal: :iranian journal of radiation research 0
a. saravanakumar department of applied science, psg college of technology, coimbatore 641 004, india k. vaideki 1department of applied science, psg college of technology, coimbatore 641 004, india k.n. govindarajan department of radiology, psg institute of medical science and research & hospitals, coimbatore 641004, india b. devanand department of radiology, psg institute of medical science and research & hospitals, coimbatore 641004, india s. jayakumar department of physics, psg institute of technology and applied research, coimbatore 641 062, india s.d. sharma radiological physics and advisory division, bhabha atomic research centre, mumbai- 400094, india

background: to suggest south india ct diagnostic reference levels (drls) by collecting radiation doses for the most commonly performed ct examinations. materials and methods: a pilot study investigated the most frequent ct examinations. 110 ct sites were asked to complete a survey booklet to allow the recording of ct parameters for each of 3 ct examinations during a 1 year time period. dose dat...

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Journal: Journal of Biomedical Physics and Engineering 2015
A Janbabanezhad-Toori A Shabestani-Monfared, M Nabahati, M R Deevband, R Abdi,

Background: Medical X-rays are the largest man-made source of public exposure to ionizing radiation. While the benefits of Computed Tomography (CT) are well known in accurate diagnosis, those benefits are not risk-free. CT is a device with higher patient dose in comparison with other conventional radiation procedures. Objective: This study is aimed at evaluating radiation dose to patients from ...

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2015
A. Janbabanezhad Toori A. Shabestani-Monfared M.R. Deevband R. Abdi M. Nabahati

BACKGROUND Medical X-rays are the largest man-made source of public exposure to ionizing radiation. While the benefits of Computed Tomography (CT) are well known in accurate diagnosis, those benefits are not risk-free. CT is a device with higher patient dose in comparison with other conventional radiation procedures. OBJECTIVE This study is aimed at evaluating radiation dose to patients from ...

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Journal: :iranian journal of radiation research 0
l. sadri department of nuclear engineering and physics, amir kabir university of technology, tehran, iran h.r. khosravi nuclear sciences school, nuclear science and technology research institute, and nuclear & radiation support department, iranian nuclear regulatory authority, tehran, iran s. setayeshi department of nuclear engineering and physics, amir kabir university of technology, tehran, iran

background: patient radiation doses from computed tomography (ct) are increasing due to the number of ct examinations performed every day. the aim of this study was assess and evaluate patient radiation doses for adult’s common ct examinations to derive local diagnostic guidance levels for common ct examinations. materials and methods: volume and weighted computed tomography dose index (ctdivol...

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Journal: International Journal of Radiation Research 2013
H.R. Khosravi, L. Sadri, S. Setayeshi,

Background: Patient radiation doses from computed tomography (CT) are increasing due to the number of CT examinations performed every day. The aim of this study was assess and evaluate patient radiation doses for adult’s common CT examinations to derive local diagnostic guidance levels for common CT examinations. Materials and Methods: Volume and weighted computed tomography dose index (C...

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Journal: :iranian journal of radiation research 0
f. bouzarjomehri department of medical physics, shahid sadoghi university of medical sciences, yazd, iran m. h. zare department of medical physics, isfahan university of medical sciences, isfahan, iran d. shahbazi department of medical physics, isfahan university of medical sciences, isfahan, iran

abstract   background: while the benefits of computed tomography (ct) are well known in accurate diagnosis, those benefits are not risk free. ct is a device with higher patient dose in comparison with other conventional radiological procedures. is the reduction of exposures by requiring optimization of ct procedures [a principle concern in radiological protection]? in this study, the radiation ...

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Journal: International Journal of Radiation Research 2006
D. Shahbazi, F. Bouzarjomehri, M. H. Zare,

  ABSTRACT   Background: While the benefits of Computed Tomography (CT) are well known in accurate diagnosis, those benefits are not risk free. CT is a device with higher patient dose in comparison with other conventional radiological procedures. Is the reduction of exposures by requiring optimization of CT procedures [a principle concern in radiological protection]? In this study, the radiatio...

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2016
Yannick Poirier Mauro Tambasco

We present an experimental validation of a kilovoltage (kV) X-ray source characterization model in an anthropomorphic phantom to estimate patient-specific absorbed dose from kV cone-beam computed tomography (CBCT) imaging procedures and compare these doses to nominal weighted CT-dose index (CTDIw) dose estimates. We simulated the default Varian on-board imager 1.4 (OBI) default CBCT imaging pro...

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Journal: Iranian Journal of Medical Physics 2018
Hamid Abdollahi, Reza Afzalipour Salman Jafari, Seied Rabi Mahdavi,

Introduction: The Diagnostic reference levels (DRLs) play a critical role in the optimization of radiation dose especially, in some conditions like pediatrics. They are useful indicators by which the radiologists can be aware of delivered excess radiation doses to the patients, and take corrective actions if necessary. In order to meet some requirements for establishing the nat...

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2014
Ahmed Mohammed Gedel

In this work management of pediatric patients doses for Computed Tomography examinations have been studied at KorleBu Teaching Hospital. The assessment of the management system involved: Estimation of Weighted Computed Tomography Dose Index (CTDIw), Volumetric Computed Tomography Dose Index (CTDIvol), Dose Length Product (DLP) and Effective dose (E); and Evaluation of quality assurance and qual...

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