Effect of patient' bladder voiding on radiation dose rates measured around patients undergoing PET/CT imaging using 18F-FDG.

Conference Paper

• نوع عمل المنشور: E.Poster
• رابط المنشور على الويب: A.Alenezi, K.Soliman
• اسم المؤتمر: International Conference on Medical physics
• عنوان المؤتمر: International Conference on Medical physics
• تاريخ المؤتمر: الأربعاء, آب (اغسطس) 5, 2015

مستخلص المنشور

Abstract
Accurate dose rate estimates is important for radiation protection specialists conducting risk assessments and performing dose reconstruction in cases of accidental exposures.
 
Objectives: The objectives of this work was to experimentally evaluate the bladder voiding factor effect on the dose rate measured from patients undergoing  PET/CT imaging studies using  18F-FDG by directly measuring the dose rate immediately before and after voiding, and compare the results with the current scientific literature.
 
Results: The bladder voiding effect had a dose rate reduction factor of about 12% between dose rates measured before and after voiding. This measured reduction factor agreed with the 15% reported by AAPM Task Group 108. We have also measured dose rates at one meter from 50 patients and found an average dose rate per unit activity of 94.3 μSv/hr/GBq. Our dose rate results were in excellent agreement with the results of the current published data (92 μSv/hr/GBq, AAPM Task Group 108)
 
Conclusions: The presented data can be applied in radiation protection optimization procedures, especially for the protection of the care givers from patients undergoing 18F-FDG PET/CT imaging when they are considered as external radiation source or hazard to others.
The provided information will benefit medical physicist working in nuclear medicine and radiation safety policy makers.