BS 6530(1994) : 1994 AMD 8835
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
METHODS FOR DETERMINING THE CHARACTERISTICS OF FOCAL SPOTS IN DIAGNOSTIC X-RAY TUBE ASSEMBLIES FOR MEDICAL USE
10-15-1995
11-23-2012
Committees responsible
National foreword
Methods
Introduction
Section 1. GENERAL
1.1 Scope and object
1.2 Normative references
1.3 Terminology
Section 2. FOCAL SPOT SLIT RADIOGRAMS
2.1 Scope
2.2 Test equipment
2.3 Test arrangement
2.4 Operating conditions
2.5 Production of the FOCAL SPOT SLIT RADIOGRAMS
2.6 Statement of compliance
Section 3. FOCAL SPOT PINHOLE RADIOGRAMS
3.1 Scope
3.2 Test equipment
3.3 Test arrangement
3.4 Operating conditions
3.5 Production of the FOCAL SPOT PINHOLE RADIOGRAMS
3.6 Statement of compliance
Section 4. FOCAL SPOT STAR RADIOGRAMS
4.1 Scope
4.2 Test equipment
4.3 Test arrangement
4.4 Operating conditions
4.5 Production of the FOCAL SPOT STAR RADIOGRAMS
4.6 Statement of compliance
Section 5. DETERMINATION OF THE FOCAL SPOT DIMENSIONS
5.1 Scope
5.2 Specified NOMINAL FOCAL SPOT VALUES
5.3 Measurement and determination
5.4 Evaluation and statement of compliance
Section 6. MODULATION TRANSFER FUNCTION
6.1 Scope
6.2 Specified MODULATION TRANSFER FUNCTIONS
6.3 Measuring equipment and measuring arrangement
6.4 Measurement
6.5 Calculation of the MODULATION TRANSFER FUNCTION
6.6 Presentation of the MODULATION TRANSFER FUNCTION
6.7 Evaluation and statement of compliance
Section 7. STAR PATTERN RESOLUTION LIMIT
7.1 Scope
7.2 Specified STAR PATTERN RESOLUTION LIMIT
7.3 Measurement
7.4 Determination of the STAR PATTERN RESOLUTION LIMIT
7.5 Evaluation and statement of compliance
Section 8. BLOOMING VALUE
8.1 Scope
8.2 Specified BLOOMING VALUE
8.3 Determination of the BLOOMING VALUE
8.4 Evaluation and statement of compliance
Annexes
A (informative) Supply of SLIT CAMERAS, PINHOLE
CAMERAS and STAR PATTERN CAMERAS
B (informative) Alignment to the REFERENCE AXIS
C (informative) Index of defined terms
Tables
1 Magnification for FOCAL SPOT SLIT RADIOGRAMS
2 LOADING FACTORS
3 Dimensions of the pinhole
4 Magnification for FOCAL SPOT PINHOLE RADIOGRAMS
5 Permissible values of FOCAL SPOT dimensions for
NOMINAL FOCAL SPOT VALUES
6 Standard magnification for MODULATION TRANSFER
FUNCTIONS
7 Standard magnification for STAR PATTERN RESOLUTION
LIMIT
8 LOADING FACTORS for the determination of the
BLOOMING VALUE
Figures
1 Essential dimensions of the slit diaphragm
2 Alignment of the SLIT CAMERA
3 References dimensions and planes
4 Directions of evaluation over distorted FOCAL SPOTS
5 Essential dimensions of a pinhole diaphragm
6 Alignment of the PINHOLE CAMERA
7 Essential dimensions of the test pattern
8 Alignment of the STAR PATTERN CAMERA
9 Alignment of the slit of the microdensitometer
10 Limitation of input data
11 Image of the test pattern
B.1 Projection of the ACTUAL FOCAL SPOT on the
REFERENCE PLANE
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