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Radiation Protection Dosimetry 2005 114(1-3):147-149; doi:10.1093/rpd/nch570
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Film dosimetry for fluoroscopic procedures: potential errors

R. E. Morrell* and A. T. Rogers

Medical Physics Directorate, Nottingham City Hospital, Hucknall Road, Nottingham NG5 1PB, UK

* Corresponding author: rmorrel1{at}ncht.trent.nhs.uk

Kodak EDR 2 film was calibrated across the range of beam qualities and exposure rates typically used in our cardiac catheterisation laboratory. Its dose–response curve was successfully modelled up to its saturation point of 1 Gy. The consistency of the film's response with film batch, time between exposure and processing processor and day-to-day variations in performance, was investigated. The effects of field size, exposure rate, beam quality and use of the dynamic wedge filter were quantified. The overall uncertainty in dose was estimated to be between –20% and +40%, at 160 mGy. This uncertainty increases as the film approaches its saturation point. In addition, some unusual artefacts were observed.


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