BS EN 61223-2-4:1995

Introduction
1. Scope and object
1.1 Scope
1.2 Object
2. Normative references
3. Terminology
3.1 Degree of requirements
3.2 Use of terms
3.3 Definitions
4. General aspects of CONSTANCY TESTS
4.1 General conditions affecting test procedures
4.2 Establishment of BASELINE VALUES
4.3 Frequency of CONSTANCY TESTS
4.4 Identification of equipment, instrumentation and
     test conditions
4.5 Measured functional parameters
5. Test methods
5.1 Summary
5.2 Test equipment
5.3 Test procedure
5.4 Data evaluation
5.5 Criteria to be applied
5.6 Test report
5.7 Action to be taken
5.8 Frequency of testing
6. Statement of compliance
Figures
1. Schematic representation of a test pattern used to
     check the constancy with respect to grey-scale
     reproduction
2. Schematic representation of a test pattern used to
     check the constancy with respect to geometry and
     line structure
3. Schematic representation of a crosshatched pattern
     used to carry out measurements with respect to
     geometry
4. Schematic representation of a test pattern used to
     check the constancy with respect to resolution
Annexes
A. Terminology - Index of terms
B. Example of a form for the standardized test report
C. Guidance on action to be taken
D. Rationale
E. Bibliography - Reference test pattern
Annex ZA (normative) Other international publications
quoted in this standard with the references of the
relevant European publications

ALSO NUMBERED AS BS 7725: SECTION 2.4: 1995 Describes a method to check the constancy of the quality of images produced by hard copy cameras. Applies to hard copy cameras producing images on monochrome continuous tone material and comprising types of camera using a cathode ray tube, laser beam, or a thermoprinting system as used in diagnostic imaging systems. Also gives terminology, diagrams and annexes.

1.1 Scope This part of IEC1223 applies to hard copy cameras producing images on monochrome continuous tone material (such as photographic films and materials sensitive to infrared radiation), and comprising types of cameras using a cathode ray tube, laser beam, or a thermoprinting system, as used in diagnostic imaging systems such as: digital radiography; digital subtraction angiography; imaging in computed tomography; magnetic resonance imaging; ultrasound imaging; imaging in nuclear medicine. *The test methods are based on the use of test patterns. This standard does not apply to x-y (analogue) recording systems used in nuclear medicine. This standard is a part of a series of Particular Publications (standards and technical reports) which give methods of tests for the constancy of properties of diagnostic imaging systems as described in IEC1223-1 (see clause2). 1.2 Object* This part of IEC1223 describes a method to check, in terms of functional parameters, the constancy of the quality of images produced by hard copy cameras in order to ensure that the required conditions for producing consistent hard copies are maintained after the calibration and adjustment have been carried out. The aims of the method are: to establish a reference level of performance for the hard copy camera when such equipment has been accepted; to detect and verify any significant variation in functional parameters which may then require corrective actions. With regard to the measurements, reference is made to methods described in related publications, which for practical reasons should be carried out prior to the application of the method described in this standard (see clause2).