engleski

Characterization of RPL and TL dosimetry systems and comparison in medical dosimetry applications

Radiophotoluminescence (RPL) dosimetry systems are under permanent development. The following dosimetric characteristics of the GD-352M RPL glass dosimeter with FGD-1000 reader (Dose Ace system) developed for medical applications were investigated: uniformity/batch homogeneity, reproducibility, linearity, detection threshold, energy dependence in air and on phantom. Some characteristics were compared to two kinds of LiF ; Cu, Mg, P TLDs: GR-200A (China) and TLD-100H (Harshaw). The characteristics investigated fulfill the requirements of the IEC 62387-1:2007 Standard for personal and environmental dosimetry (IEC, 2007). These dosimetry systems were applied in paediatric chest X-ray diagnostics on 60 patients. The dosimetry results with both dosimetry systems showed a good correlation of dose measured on the back of the patient with the body mass index (BMI) on examination by two technicians (average dose 0.12-0.19 mSv). Higher doses (0.33-0.39 mSv) were found on the patients examined by the third technician. Measurements on further 40 patients following additional consulting and education of the technicians showed dose reduction (0.13-0.18 mSv for all 3 technicians).

RPL ; glass dosimeters ; LiF:Mg ; Cu ; P ; energy dependence ; IEC standards ; medical dosimetry ; paediatric chest X-ray diagnostics

Rad je prezentiran na skupu 16th Solid State Dosimetry Conference, održanom od 19.-24.09.2011., Sydney, Australija.