dose assessment in computed tomography examination and establishment of local diagnostic reference levels in mazandaran, iran

Authors

a janbabanezhad-toori school of medicine, babol university of medical sciences, babol, iran

a shabestani-monfared department of medical physics, faculty of medicine, babol university of medical sciences, babol, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences)

m r deevband department of medical physics, school of medicine, shahid beheshti university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences)

r abdi department of radiology, mazandaran university of medical sciences, sari, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences)

abstract

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 computed tomography (ct) examination in mazandaran hospitals and defining diagnostic reference level (drl).   method : patient-related data on ct protocol for four common ct examinations including brain, sinus, chest and abdomen & pelvic were collected. in each center, computed tomography dose index (ctdi) measurements were performed using pencil ionization chamber and ct dosimetry phantom according to aapm report no. 96 for those techniques. then, weighted computed tomography dose index (ctdi w ), volume computed tomography dose index (ctdi vol ) and dose length product (dlp) were calculated. results : the ctdi w for brain, sinus, chest and abdomen & pelvic ranged (15.6-73), (3.8-25. 8), (4.5-16.3) and (7-16.3), respectively. values of dlp had a range of (197.4-981), (41.8-184), (131-342.3) and (283.6-486) for brain, sinus, chest and abdomen & pelvic, respectively. the 3 rd quartile of ctdi w , derived from dose distribution for each examination is the proposed quantity for drl. the drls of brain, sinus, chest and abdomen & pelvic are measured 59.5, 17, 7.8 and 11 mgy, respectively. conclusion : results of this study demonstrated large scales of dose for the same examination among different centers. for all examinations, our values were lower than international reference doses.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Dose Assessment in Computed Tomography Examination and Establishment of Local Diagnostic Reference Levels in Mazandaran, Iran

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 ...

full text

Dose Assessment in Computed Tomography Examination and Establishment of Local Diagnostic Reference Levels in Mazandaran, Iran

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 ...

full text

Diagnostic Reference Levels for Computed Tomography Examinations in Iran: A Nationwide Radiation Dose Survey

Introduction: International Commission on Radiological Protection introduced three basic principles of radiation protection, namely justification, optimization, and dose limit. Medical exposure has no dose limits, and generally, diagnostic reference levels are used as a tool for optimization of patient protection. Material and Methods: Dosimetry was performed on 20 CT scanners located in 14 cit...

full text

Local Diagnostic Reference Levels for Common Computed Tomography Procedures at a Tertiary Hospital in South Africa

Introduction: An operational computed tomography (CT) scanner is a major source of human exposure to ionizing radiation. Exposure increases the risk of cancer and aplastic anaemia. All radiation exposures should be justified and optimized to meet the clinical objective. In order to avoid the administration of excessive radiation dose to patients, diagnostic reference l...

full text

Pediatric dose assessment in common CT examination towards establishment of related regional DRL in Mazandaran, Iran

Background: Computed Tomography (CT) is main contributor of population dose from diagnostic X-ray examinations. Children are more radiosensitive than adults, thus optimization of CT examination in these patients is essential. The purpose of this study was to evaluate dose delivered to pediatric patients’ undergoing CT examination of the common examinations and also establishing local Diag...

full text

The establishment of computed tomography diagnostic reference levels in Portugal.

The aims of this study were to investigate the frequency of Portuguese computed tomography (CT) examinations, identify protocol application and establish diagnostic reference levels (DRLs). CT departments (n=211) were surveyed nationally (June 2011-January 2012) and CT protocol information and dose data were collected, as were retrospective age-categorised paediatric CT data from three national...

full text

My Resources

Save resource for easier access later


Journal title:
journal of biomedical physics and engineering

جلد ۵، شماره ۴ Dec، صفحات ۰-۰

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023