1 Scope
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:
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a) focal spot dimensions in terms of nominal focal spot values, ranging from 0,1 to 3,0;
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b) line spread functions;
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c) one-dimensional modulation transfer functions;
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d) focal spot pinhole radiograms,
and the means for indicating compliance.
In informative annexes, star pattern imaging and blooming value are described.