Absorbed Dose Rate of Some Body Organs in Diete-Koki Memorial Hospital, Opolo, Yenagoa, Bayelsa State

Abstract

The research work was carried out at Diete-koki Memorial Hospital, located at Opolo, Yenagoa, Bayelsa State, Nigeria. The Background Ionizing Radiation (BIR) was measured for five different locations in the Hospital with the aid of radiation device- Radalert x100 where locations such as X-ray room, Walkway, Accident and Emergency room, Reception and waiting room were measured and the mean value obtained for the various locations. The radiological parameters were calculated with an already established conversion factors and formula. The results shows that the Background ionizing radiation exposure (BIR) mean for each location, is indicated in the Bar chart, Background ionizing radiation (BIR) mean values ranges from 0.008±0.001 to 0.013±0.003 mSv/y respectively. The Absorbed dose rate (AbD) mean value ranges from 0.070±0.001 to 0.113±0.002 nGy/h. while the calculated Annual Effective Dose Rate (AEDE) mean values ranges from 0.107±0.001 to 0.411±0.003 mSv/y. The calculated mean values of Excess Life Cancer Risk (ELCR) ranges from 0.294 x10-3 to 0.630 x10-3. The percentage of Radiation Dose distribution rate in respect to different body organs shows that the ovaries recorded the lowest percentage of 13% as against the testes which have the highest percentage with 18%. All radiological parameter values recorded are in comparison with the World Permissible Limits as provided by UNSCEAR 2000.

Keywords — Radiation, Background Ionization radiation, Dose Distribution, Dose rate, measurement