Mohamad, Nurul Ashikin
(2015)
Estimation of radiation exposure to
personnel in nuclear medicine during 131| ablation procedure: comparison between
direct and indirect methods.
Project Report.
Universiti Sains Malaysia.
(Submitted)
Abstract
This study focused on measurement of exposure rates to personnel in
Nuclear Medicine during 131l ablation procedures using direct and indirect methods. 9 patients undergoing 131l ablation procedures with average activity 131.11 mCi were randomly selected in this study. The direct method of exposure
rate measurement was conducted using survey meter (Victoreen 415P-RYR) at
various distances (1.0 m, 1.5 m and 2.0 m) from the patients at thyroid and
abdomen region. The indirect method of exposure rate measurement was
conducted using mathematical model of exposure rate. The result showed that
exposure rates decreased with the increased in distance for both direct and
indirect methods. The exposure rate of thyroid and abdomen for direct method
was higher than indirect method at all distances. The percentage difference
between direct and indirect method for various distance were 22.39% ± 2.04 (1.0
m), 16.37% ± 1.38 (1.5 m) and 34.04% ± 3.64 (2.0 m) respectively. Percentage
difference of low activity (80 mCi) was significantly decreased with increased time
while the percentage difference in medium (120 mCi) and high activity (175 mCi)
were significantly decreased as the time increased. The exposure rate between thyroid and abdomen increased at higher
5.32% ± 0.284 (120 mCi), 11.67% ± 0.345 (175 mCi). As conclusion, this study
provides useful indicator of occupational exposure to personnel that can be used
as guidance for personnel attending patients in radioiodine wards.
| Item Type: |
Monograph
(Project Report)
|
| Uncontrolled Keywords: |
radiation exposure, nuclear medicine |
| Subjects: |
Q Science > QC Physics |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
Mr Husnan Budin
|
| Date Deposited: |
07 May 2023 01:31 |
| Last Modified: |
07 May 2023 01:31 |
| URI: |
http://eprints.usm.my/id/eprint/58219 |
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