IEC 60336 Ed. 5.0 b:2020

Current Revision
Medical electrical equipment - X-ray tube assemblies for medical diagnosis - Focal spot dimensions and related characteristics

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Medical electrical equipment - X-ray tube assemblies for medical diagnosis - Focal spot dimensions and related characteristics

PUBLISH DATE 2020
PAGES 94

Medical electrical equipment - X-ray tube assemblies for medical diagnosis - Focal spot dimensions and related characteristics

IEC 60336:2020 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.

IEC 60336:2020 cancels and replaces the fourth edition published in 2005. This edition constitutes a technical revision.

The significant changes of this fifth edition with respect to the previous edition are detailed in Clause E.6. These changes are:

  • a) introduction of digital detectors and discretization errors;
  • b) fewer normative requirements;
  • c) support for both SLIT CAMERA and PINHOLE CAMERA;
  • d) reintroduction of distorted (skewed) FOCAL SPOT;
  • e) keeping of STAR PATTERNS and BLOOMING VALUE as informative.
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