title: Calibration of Kodak EDR2 film for patient skin dose assessment in cardiac catheterization procedures.
abstract: Kodak EDR2 film has been calibrated across the range of exposure conditions encountered in our cardiac catheterization laboratory. Its dose-response function has been successfully modelled, up to the saturation point of 1 Gy. The most important factor affecting film sensitivity is the use of beam filtration. Spectral filtration and kVp together account for a variation in dose per optical density of -10% to +25%, at 160 mGy. The use of a dynamic wedge filter may cause doses to be underestimated by up to 6%. The film is relatively insensitive to variations in batch, field size, exposure rate, time to processing and day-to-day fluctuations in processor performance. Overall uncertainty in the calibration is estimated to be -20% to +40%, at 160 mGy. However, the uncertainty increases at higher doses, as the curve saturates. Artefacts were seen on a number of films, due to faults in the light-proofing of the film packets.
authors.affiliation: Medical Physics Directorate, Nottingham City Hospital, Nottingham NG5 1PB, UK. rmorrell@ncht.trent.nhs.uk
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Morrell
authors.forename: Andy
authors.initials: A
authors.lastname: Rogers
mesh_terms: D001822:Body Burden; D002138:Calibration / Q000592:standards; D006328:Cardiac Catheterization / Q000009:adverse effects*; D004307:Dose-Response Relationship, Radiation; D005373:Film Dosimetry / Q000295:instrumentation* / Q000379:methods* / Q000592:standards; D006801:Humans; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods* / Q000592:standards; D011855:Radiodermatitis / Q000209:etiology* / Q000517:prevention & control; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity