Calibration of Film for Accurate Megavoltage Photon Dosimetry

Abstract An accurate method of converting film density to dose is presented. For films oriented parallel to the beam’s central axis, calibration curves were produced at several depths using Kodak XV-2 film for cobalt-60, 4 MV, and 18 MV beams. Then the appropriate curve was employed to convert the f...

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Veröffentlicht in:	Medical dosimetry : official journal of the American Association of Medical Dosimetrists 1994, Vol.19 (1), p.43-46
Hauptverfasser:	Hale, J.I, Kerr, A.T, Shragge, P.C
Format:	Artikel
Sprache:	eng
Schlagworte:	CALIBRATION COBALT 60 Dosimetry FILM DOSIMETRY Film Dosimetry - standards Hematology, Oncology and Palliative Medicine PHANTOMS PHOTON BEAMS PHOTONS RADIATION DOSES RADIATION PROTECTION AND DOSIMETRY Radiology RADIOLOGY AND NUCLEAR MEDICINE SPECTRA
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Zusammenfassung:	Abstract An accurate method of converting film density to dose is presented. For films oriented parallel to the beam’s central axis, calibration curves were produced at several depths using Kodak XV-2 film for cobalt-60, 4 MV, and 18 MV beams. Then the appropriate curve was employed to convert the film density to dose at a specific depth. It is hypothesized that the change in film response with depth is due to changes in the photon spectra at depth in a phantom.
ISSN:	0958-3947 1873-4022
DOI:	10.1016/0958-3947(94)90032-9