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Radiologia Brasileira

versão On-line ISSN 1678-7099

Resumo

MAGALHAES, Luis Alexandre Gonçalves et al. Evaluation of automatic processors processing speed using the STEP test. Radiol Bras [online]. 2004, vol.37, n.3, pp.185-186. ISSN 1678-7099.  http://dx.doi.org/10.1590/S0100-39842004000300009.

The evaluation of film processing using the STEP test (sensitometric test for the evaluation of processing) is based on the identification of significant deviations in the processor-chemicals-film system. Ideal processing conditions are established for this type of evaluation. A standard film is processed according to the manufacturer's recommendations, i.e. standard processing at 100. The film is exposed to the light of a calibrated sensitometer and the sensitometric steps are read with the use of a densitometer. A standard curve (OD × STEP) is therefore obtained. The percentual deviation should be lower than 20% compared to the standard curve. This method is useful to identify processing problems. We tested processors from several public/university hospitals and found that approximately 33% of the equipments had inadequate processing conditions.

Palavras-chave : Automatic processors; Radiographic films; Sensitometry; STEP test.

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