IEC 60336:2005

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Determinations for the evaluation of the FOCAL SPOT
   characteristics
   4.1 Statement of the FOCAL SPOT characteristics
   4.2 Longitudinal axis of the X-RAY TUBE ASSEMBLY
   4.3 REFERENCE AXIS of the X-RAY TUBE ASSEMBLY
   4.4 Direction of evaluation for the FOCAL SPOT length
   4.5 Direction of evaluation for the FOCAL SPOT width
5 FOCAL SPOT camera set-up
   5.1 Overview
   5.2 Test equipment
   5.3 Test arrangement
   5.4 Total uncertainty of the camera set-up
6 Production of RADIOGRAMS
   6.1 Overview
   6.2 Operating conditions
   6.3 Production of FOCAL SPOT SLIT RADIOGRAMS or FOCAL
        SPOT PINHOLE RADIOGRAMS
   6.4 Statement of compliance
7 Determination of the LINE SPREAD FUNCTION
   7.1 Overview
   7.2 Measuring equipment and measuring arrangement
   7.3 Measurement of the density distribution
   7.4 Determination of the LINE SPREAD FUNCTION
   7.5 Statement of compliance
8 Determination of FOCAL SPOT dimensions
   8.1 Overview
   8.2 Measurement and determination
   8.3 Specified NOMINAL FOCAL SPOT VALUES
   8.4 Statement of compliance
   8.5 Marking of compliance
9 Determination of the MODULATION TRANSFER FUNCTION
   9.1 Overview
   9.2 Specified MODULATION TRANSFER FUNCTION
   9.3 Calculation of the MODULATION TRANSFER FUNCTION
   9.4 Evaluation of compliance of the MTF
   9.5 Statement of compliance
10 FOCAL SPOT STAR RADIOGRAMS
   10.1 Overview
   10.2 Test equipment
11 STAR PATTERN RESOLUTION LIMIT
   11.1 Overview
   11.2 Specified STAR PATTERN RESOLUTION LIMIT
   11.3 Measurement
   11.4 Determination of the STAR PATTERN RESOLUTION LIMIT
   11.5 Evaluation and statement of compliance
12 BLOOMING VALUE
   12.1 Overview
   12.2 Determination of the BLOOMING VALUE
   12.3 Evaluation and statement of compliance
13 Alternate measurement methods
Annex A (informative) Alignment to the REFERENCE AXIS
Annex B (informative) Application of digital X-ray image
                      detectors for determination of the
                      FOCAL SPOT characteristics
Annex C (informative) Historical background
Bibliography
Index of defined terms

Applies to focal spots in medical diagnostic X-ray tube assemblies or medical use, operating at X-ray tube voltages up to and including 200 kV. Describes the test methods for evaluating focal spot characteristics and the means for indicating compliance. The contents of the corrigendum of May 2006 have been included in this copy.