This document applies to FOCAL SPOTS in medical diagnostic X- RAY TUBE ASSEMBLIES for medical use, operating at X- RAY TUBE VOLTAGES up to and including 150 kV.
This document describes the test methods employing digital detectors for determining:
a) FOCAL SPOT dimensions in terms of NOMINAL FOCAL SPOT VALUES , ranging from 0,1 to 3,0;
b) LINE SPREAD FUNCTIONS ;
c) one-dimensional MODULATION TRANSFER FUNCTIONS ;
d) FOCAL SPOT PINHOLE RADIOGRAMS ,
and the means for indicating compliance.
In informative annexes, STAR PATTERN imaging and BLOOMING VALUE are described.
