چاپ صفحه |  صفحه نخست سامانه |  نویسندگان |  اطلاعات تفضیلی |  دانلود مقاله | علوم پزشکی کرمانشاه |
| نویسنده | نفر چندم مقاله |
|---|---|
| مسعود رضائی | سوم |
| کریم خوش گرد | دوم |
| احمد محمدبیگی | اول |
| راضیه زاغیان | چهارم |
| عنوان | متن |
|---|---|
| کلمات کلیدی | DRLs, CT Scan, Adults |
| چکیده | Introduction: One of the aspects of most important radiological protection principle, ALARA, is the dose limits that determines the annual permissible dose in the general population and radiation workers. However, determining the dose limits of patients is not accessible and the patients can have whatever medical exposure levels during one year. This has created some challenges for patient’s absorbed dose due to medical examinations. ICRP in its report No. 76 (1996) has introduced the term “Diagnostic Reference Levels” (DRLs) as an alternative to dose limits for optimizing the radiation protection of the patients in medical imaging modalities in which ionizing radiation is used Therefore, it is necessary to determine the diagnostic reference levels in different medical imaging centers (of different cities and or countries). The aim of this study was to review the DRLs for CT examinations of adult’s head, chest, abdomen-pelvis from 2010 to 2016 in literature Also, different methods of diagnostic reference levels dosimetry and survey are reviewed. Finally, For the first time in Iran we introduced an electronic and comprehensive approach to permanently evaluates and compares the DRLs. Material and methods: We did searching by use of this keyword’s: Diagnostic Reference Levels, CT Scan, Adult, DLP in this database’s: PubMed, Web of Science, Google scholar, Science direct, SID. And finally 36 papers were found and studied. Result: Each CT examination dose measurements have been done by using ionization chamber dosimeter (Pencil chamber) Before the year 2001, but after that all CT scanner manufacture were obliged to display the dose of each examination on the console device. And now, pencil chamber is used for calibration of CT scanners. DRLs values have been decreasing in the last 7 years. But values may vary for a specific examination in different centers by a factor of three. This difference could be due to differences in the design of: beam filtration, isocenter distance, beam collimation, X-ray tube efficiency, detector efficiency and array, data acquisition system and another factors between companies and models. Conclusion: In this system, at the first step after device calibration DLPs curve is determined in terms of Body Mass Index values (BMI) for each examination in every imaging center. And then, a numbers of each center examinations, such as the patient condition, device and protocol information is entered automatically or manually into the online system (monthly).By using this system in addition to continues and very quickly determining and comparing local DRLs, and establish the National Diagnostic Deference Levels to optimizing and improve patient protection, we can supervise the performance of radiographers and devices. Keywords: DRLs, CT Scan, |
| متن مقاله | |
| نتیجه مقاله | In this system, at the first step after device calibration DLPs curve is determined in terms of Body Mass Index values (BMI) for each examination in every imaging center. And then, a numbers of each center examinations, such as the patient condition, device and protocol information is entered automatically or manually into the online system (monthly).By using this system in addition to continues and very quickly determining and comparing local DRLs, and establish the National Diagnostic Deference Levels to optimizing and improve patient protection, we can supervise the performance of radiographers and devices. |
| نام فایل | تاریخ درج فایل | اندازه فایل | دانلود |
|---|---|---|---|
| gavahi eraeh.JPG | 1396/03/28 | 63251 | دانلود |
| tasvir 1 ketabche.jpg | 1396/03/28 | 2706926 | دانلود |
| darkhast padash.png | 1396/03/28 | 884642 | دانلود |
| tasvir 2 ketabche.jpg | 1396/03/28 | 2968345 | دانلود |
