ESTABLISHMENT OF DIAGNOSTIC REFERENCE LEVEL FOR COMPUTED TOMOGRAPHY (CT) IN SUDAN

Abstract

The use of X-ray radiation in the medical field is increasing steadily since discovered for its great services in the discovery of the disease and in treatment , so this study aimed to work to establish a level of exposure to acceptable according to international standards without prejudice to reduce the presence of medical imaging and desired information from the tests and that called DRLS. This study was done in the period between 2012 -2015 included 677 unchanged computed tomography average weight of between (65 kg to 75 kg ) and with its similarity to the complaint in a single examination and then took the same 10 patients for each examination divided Imager head , chest, abdomen and pelvis, according to the criteria traded on the work DRLS on 17 Cross-Sectional center ray has focused on the study of more centers and more frequency tests request . The study included all devices CT scan in these centers, which range between (2 slice to 128 Slice) More than a statistical method used in it to represent the results and data in order to calculate DRLS of the total statistical data which centered on the concept of (DLP) and (CTDIV) basic units to create a diagnostic reference dose for each individual center and then the value located at the account (75%-3 rd quartile) DRLS per centers and identify NDRL full range representing .DRL The study showed follows First in brain imaging that there is a difference in the level of radiation exposure from center to center in spite of its similarity to the same center and the same device has been found that the difference in the use of exposing the top factors such as current for priming and increasing the IIIslide area and either increase the area under examination and either of the weakness in the training and calculates the DRL to portray the brain It shows that (75%) corresponding to the value in (1209 mGy.sm) Second, a CT scan of the chest showed a large study differences are in some of the centers, to a difference in the method used screening and factors used in the exposure to radiation. The DRLS in 75% (650 mGy / cm) Thirdly number (179) patients of the abdomen and pelvis, especially in patients with urinary tract tests to check routinely The study showed that DRLS (75%) of the data is located in the (978 mGy / cm) The study concluded I'm there a lot of tests are ordered to incomplete information in the request for examination , leading to a repeat examination more than once as this study an effort to develop a plan and path of the road starts from him and that the lack of previous studies of this area in the Sudan in this area had to be that the other studies deeper and more comprehensive in order to increase the quality of medical imaging , which in turn is to increase its presence in providing highest quality and diagnostic tests less Take and underestimate exposure to radiation damage .