Sensitivity of linear CCD array based film scanners used for film dosimetry.
Film dosimetry is commonly performed by using linear CCD array transmission optical densitometers. However, these devices suffer from a variation in response along the detector array. If not properly corrected for, this nonuniformity may lead to significant overestimations of the measured dose as one approaches regions close to the edges of the scanning region. In this note, we present measurements of the spatial response of an AGFA Arcus II document scanner used for radiochromic film dosimetry. Results and methods presented in this work can be generalized to other CCD based transmission scanners used for film dosimetry employing either radiochromic or radiographic films.
Devic
Slobodan
S
Medical Physics Department, McGill University Health Centre, Montreal, Quebec, Canada. devic@medphys.mcgill.ca
Wang
Yi-Zhen
YZ
Tomic
Nada
N
Podgorsak
Ervin B
EB
D016287:Computer Peripherals; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005373:Film Dosimetry / Q000295:instrumentation* / Q000379:methods*; D011829:Radiation Dosage; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*