1 - AS/NZS 4274:1995 X-RAY TUBE ASSEMBLIES FOR MEDICAL DIAGNOSIS-CHARACTERISTICS OF FOCAL SPOTS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1: GENERAL
7 - 1.1 Scope and object
7 - 1.2 Normative references
7 - 1.3 TermInology
7 - 1.3.1 Degree of requirements
8 - 1.3.2 Definitions
8 - SECTION 2: FOCAL SPOT SLIT RADIOGRAMS
8 - 2.1 Scope
8 - 2.2 Test equipment
8 - 2.2.1 SLIT CAMERA
9 - 2.2.2 RADIOGRAPHIC FILM
9 - 2.3 Test arrangement
9 - 2.3.1 Alignment of the SLIT CAMERA
10 - 2.3.2 Position of the SLIT CAMERA
11 - 2.3.3 Orientation of the slit diaphragm
12 - 2.3.4 Position of the RADIOGRAPHIC FILM
12 - 2.4 OperatIng conditions
12 - 2.4.1 X-RAY TUBE ASSEMBLY
13 - 2.4.2 LOADING FACTORS
13 - 2.5 Production of the FOCAL SPOT SLIT RADIOGRAMS
14 - 2.6 Statement of compliance
14 - SECTION 3: FOCAL SPOT PINHOLE RADIOGRAMS
14 - 3.1 Scope
14 - 3.2 Test equipment
14 - 3.2.1 PINHOLE CAMERA
15 - 3.2.2 RADIOGRAPHIC FILM
15 - 3.3 Test arrangement
15 - 3.3.1 Alignment of the PINHOLE CAMERA
16 - 3.3.2 Position of the PINHOLE CAMERA
16 - 3.3.3 Position of the RADIOGRAPHIC FILM
16 - 3.4 Operating conditions
17 - 3.5 Production of the FOCAL SPOT PINHOLE RADIOGRAMS
17 - 3.6 Statement of compliance
17 - SECTION 4: FOCAL SPOT STAR RADIOGRAMS
17 - 4.1 Scope
17 - 4.2 Test equipment
17 - 4.2.1 STAR PATTERN CAMERA
18 - 4.2.2 RADIOGRAPHI C FILM
18 - 4.3 Test arrangement
18 - 4.3.1 Alignment of the STAR PATTERN CAMERA
19 - 4.3.2 Position of the STAR PATTERN CAMERA
19 - 4.3.3 Position of the RADIOGRAPHIC FILM
19 - 4.4 Operating conditions
19 - 4.5 Production of the FOCAL SPOT STAR RADIOGRAMS
20 - 4.6 Statement of compliance
20 - SECTION 5: DETERMINATION OF FOCAL SPOT DIMENSIONS
20 - 5.1 Scope
22 - 5.2 Specified NOMINAL FOCAL SPOT VALUES
22 - 5.2.1 Nominal values
22 - 5.2.2 Actual values
22 - 5.3 Measurement and determination
22 - 5.3.1 Measurement
22 - 5.3.2 Measuring arrangement
22 - 5.3.3 Measurement of the linear dimensions
22 - 5.3.4 Accuracy of measurement
23 - 5.3.5 Determination of the width and the length of the FOCAL SPOT
23 - 5.4 Evaluation and statement of compliance
23 - 5.4.1 Evaluation of compliance
23 - 5.4.2 Statement of compliance
23 - 5.4.3 Marking of compliance
24 - SECTION 6: MODULATION TRANSFER FUNCTION
24 - 6.1 Scope
24 - 6.2 Specified MODULATION TRANSFER FUNCTIONS
24 - 6.3 Measuring equipment and measuring arrangement
25 - 6.4 Measurement
25 - 6.4.1 Measurement of the density distribution
25 - 6.4.2 Corrections to be applied
26 - 6.5 Calculation of the MODULATION TRANSFER FUNCTION
26 - 6.5.1 Calculation for the theoretical magnification approaching infinity
26 - 6.5.2 Calculation for the standard magnification
27 - 6.5.3 Calculation for finite magnification
27 - 6.6 Presentation of the MODULATION TRANSFER FUNCTION
27 - 6.7 Evaluation and statement of compliance
27 - 6.7.1 Evaluation of compliance of the MODULATION TRANSFER FUNCTION
28 - 6.7.2 Statement of compliance
28 - SECTI ON 7: STAR PATTERN RESOLUTION LIMIT
28 - 7.1 Scope
28 - 7.2 Specified STAR PATTERN RESOLUTION LIMIT
28 - 7.3 Measurement
29 - 7.4 Determination of the STAR PATTERN RESOLUTION LIMIT
29 - 7.4.1 Determination of magnification
29 - 7.4.2 STAR PATTERN RESOLUTION LIMIT for standard magnification
30 - 7.4.3 STAR PATTERN RESOLUTION LIMIT for finite magnification
30 - 7.4.4 Presentation of STAR PATTERN RESOLUTION LIMIT
30 - 7.5 Evaluation and statement of compliance
30 - 7.5.1 Evaluation of compliance
30 - 7.5.2 Statement of compliance
31 - SECTION 8: BLOOMING VALUE
31 - 8.1 Scope
31 - 8.2 SpecifIed BLOOMING VALUE
31 - 8.3 Determination of the BLOOMING VALUE
31 - 8.4 Evaluation and statement of compliance
31 - 8.4.1 Evaluation of compliance
32 - 8.4.2 Statement of compliance
33 - Annex A - Supply of SLI T CAMERAS, PI NHOLE CAMERAS and STAR PATTERN CAMERAS
34 - Annex B - Alignment to the REFERENCE AXIS
36 - Annex C - Index of defined terms