EVALUATION OF ENTRANCE SKIN DOSE FOR ADULT PATIENTS UNDERGOING DIAGNOSTIC X-RAY EXAMINATION USING C-SHARP SOFTWARE   IN SOME PROMINENT HOSPITALS IN OYO STATE, NIGERIA

G. A. Isola; O. M. Oni; O. T. Orodiran; P. S. Ayanlola

G. A. Isola Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso
O. M. Oni Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso
O. T. Orodiran Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso
P. S. Ayanlola Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso

Abstract

A total of 700 patients were surveyed using C-sharp software to determine entrance skin dose (ESD) of patients undergoing x-ray examination of the chest (PA/LAT/AP), cervical spine (AP/LAT), thoracic spine (AP/LAT), lumbar spine (AP/LAT) and pelvis (AP) in eight radiological units of both public and private owned hospitals. The study considered body weight 50-70kg adults. The patients’ characteristic and exposure parameters such as examination type, projection type, sex, age, weight, tube voltage (kV) and product of the current and time (mAs) were scripted into the software. The mean of the determined ESD were 0.27 mGy, 0.25 mGy, 0.38 mGy, 1.20 mGy, 3.07 mGy, 2.25 mGy, 2.02 mGy, 2.80 mGy, 3.35 mGy and 2.01 mGy and the mean effective doses as presented: 0.032 mSv 0.030 mSv, 0.046 mSv, 0.048 mSv, 0.015 mSv, 0.090 mSv, 0.242 mSv, 0.274 mSv, 0.402 mSv and 0.161 mSv for chest AP, chest PA, chest LAT, cervical spine AP, cervical spine LAT, thoracic spine AP, thoracic spine LAT, lumbar spine AP, lumbar spine LAT and pelvis AP respectively. The results were compared with published studies and international established diagnostic reference levels (DRLs).