Measurement of dose-area product with GafChromic XR Type R film.
Many of the newer X-ray machines are equipped with electronic means to provide dose-area product (DAP) information. For machines without that ability, an alternative method is to record radiation on a film that can handle a large amount of cumulative exposure. The use of GafChromic XR Type R film was investigated for this purpose by placing it at the X-ray tube assembly to record the radiation in interventional radiological procedures. Dose-area product was determined with a reflective densitometer and then with a flatbed scanner. Precisions were demonstrated to be 5% and 2%, respectively. In a comparison with the machine-recorded DAP, a regression analysis showed the validity of both techniques for values less than 1200 Gy-cm2.
Thomas
George
G
Department of Radiological Sciences, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma 73104, USA. George-Thomas@ouhsc.edu
Li
Yushan
Y
Chu
Robert Y L
RY
Cheung
John Y
JY
Maqbool
Feroz
F
Rabe
Frank
F
Burns
G Scott
GS
D000465:Algorithms; D003720:Densitometry / Q000379:methods*; D004307:Dose-Response Relationship, Radiation; D019544:Equipment Failure Analysis; D005373:Film Dosimetry / Q000295:instrumentation* / Q000379:methods*; D011829:Radiation Dosage; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity