ANSI PH2.50

Description / Abstract: This International Standard specifies methods for determining the ISO speed and average gradient of the film/film-process combinations used in medical and dental radiography other than mammography. Sensitometric procedures are described for films exposed directly to X-rays. The purpose of this International Standard is to provide a method for the measurement of ISO speed and average gradient so that the characteristics of the film/film-process system can be obtained reproducibility and can also be compared with those of other systems. Standard process formulae and cycles are intended primarily for those applications where specification or comparison work must include a specific published set of formulae and cycle characteristics.

This International Standard is not intended to specify the only method permissible for exposing and processing dental and medical X-ray film. Other methods are permissible provided that it can be demonstrated that