NAPM IT2.41 : 0

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 General requirements
5 Determination of sensitometric curve shape
6 Determination of average gradient
7 Determination of speed
8 Speed and average gradient determination without
    sensitometric curve
9 Accuracy
10 Test report
TABLES
1 Beam qualities for the determination of the
    sensitometric curve shape
2 Specification of techniques
FIGURES
1 Geometric set-up of the inverse-square-law sensitometer
    for exposure of the screen/film combination
2 Geometric set-up for calibration of the inverse-square-law
    sensitometric
3 Sensitometric curve
4 Phantom for technique I
5 Geometric set-up for adjustment of beam qualities used
    for techniques I, II, III and IV
6 Geometric set-up for the measurement of speed
    (techniques I, II and III)
7 Geometric set-up for the measurement of speed
    (technique IV)
ANNEX
A Bibliography

Specifies methods for determination of the average gradient, sensitometric curve shape, and speed of a single sample of a film/filmholder/screen/processing system in medical radiography. Excluded are such applications for dental radiography, mammography and direct-exposing medical radiographic systems. NOTE:- Hereafter, film/filmholder/screen combinations will be referred to as "combinations" and will be referred to as "systems" when the processing is included.