W Jackson 1975 Phys. Med. Biol. 20 268 doi:10.1088/0031-9155/20/2/009
W Jackson
Show affiliationsThe penetrameter method makes use of the attenuation in copper of a heavily filtered X-ray beam to predict the generating kVp. This is derived from the matching step or copper reference number (CRN) of a film density matching process in which a fast and slow screen combination is employed. In the present work, theoretical spectra resulting from chosen representative kV and mA wave-forms have been derived by computer analysis, assuming Kramers expression for the bremsstrahlung emission from a thick target. The CRN appropriate to each spectrum has been found and its relation to kVp recorded.
Issue 2 (March 1975)
W Jackson 1975 Phys. Med. Biol. 20 268
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