BS 7725-2.2:1994 : Evaluation and routine testing in medical imaging departments — Part 2. Constancy tests — Section 2.2 Method for radiographic cassettes and film changers and film-screen contact and relative sensitivity of the screen-cassette assembly
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This technical report applies to radiographic cassettes and to film changers used to record an X-ray pattern on radiographic film by direct radiography.
This technical report applies to radiographic cassettes and film changers that are equipped with intensifying screen(s).
This technical report does not apply to specialized radiographic cassettes such as mammographic cassettes, multi-section cassettes and cassettes used in dental panoramic tomography. Its application to radiographic cassettes with an integrated anti-scatter grid may not give satisfactory results.
This technical report is a part of a series of Particular Publications (standards and technical reports) which will describe test methods for the constancy of properties of various subsystems of diagnostic x-ray equipment, as described in IEC 1223-1.
This technical report describes simple methods to check:
— the constancy of adequate, homogeneous contact between the intensifying screen(s) and the radiographic film in the radiographic cassette or the film changer;
— the relative sensitivity of the intensifying screen(s) and associated radiographic cassette.
BS 7725-2.2:1994 : Evaluation and routine testing in medical imaging departments — Part 2. Constancy tests — Section 2.2 Method for radiographic cassettes and film changers and film-screen contact and relative sensitivity of the screen-cassette assembly
