Evaluation of Radiation doses and Radiation Risk in Teaching Sohag Hospital, Egypt

Measurement of background ionizing radiation level at Teaching Sohag Hospital, Egypt was carried out using Thermo Scientific RadEye B20 Multi-Purpose Survey Meters. Radiation doses from MRI, CT, X-ray, US and linear accelerator departments and its related risks to the patients from were analyzed. The results indicated that the ambient dose rate and indoor annual effective dose rate (IAEDR) are high when the devise is ON. Ambient dose values ranged from 0.082±0.015 to 0.09±0.019 μSv/hr, 0.084±0.011 to 349.6±67.582 μSv/hr, 0.076±0.038 to 36.28±36.308 μSv/hr and 0.094±0.013 to 4.3±1.447 μSv/hr for MRI, CT, X-ray and linear accelerator, respectively. Results obtained range from 0.07±0.014 μSv/hr to 0.186±0.024 μSv/hr with an average of 0.1±0.023 μSv/hr for indoor measurement in different departments and locations within the hospital. This present work showed that the CT, X-ray and linear accelerator systems can impart high radiation doses and increase of radiation risk to patients if optimization protocols are ignored. The radiation doses values when compared to standard of 0.274μSv/hr recommended as worldwide average natural dose of background ionizing radiation are within permissible allowed value in different departments and locations within the hospital. Therefore, different departments in Teaching Sohag Hospital are radiologically safe.