BS EN IEC 60336:2021 - Page 2

Medical electrical equipment. X-ray tube assemblies for medical diagnosis. Focal spot dimensions and related characteristics. | Status: Current

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:

1. a) focal spot dimensions in terms of nominal focal spot values, ranging from 0,1 to 3,0;
2. b) line spread functions;
3. c) one-dimensional modulation transfer functions;
4. d) focal spot pinhole radiograms,

and the means for indicating compliance. In informative annexes, star pattern imaging and blooming value are described.