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This Document Has Been Superseded
A newer publication replaces it: BSI BS EN IEC 60806
Determination of the maximum symmetrical radiation field from a rotating anode X-ray tube for medical diagnosis
1.1 Scope
This standard is applicable to X-RAY SOURCE ASSEMBLIES and X-RAY TUBE ASSEMBLIES containing ROTATING ANODE X-RAY TUBES, for use in MEDICAL DIAGNOSTIC RADIOLOGY for techniques in which the X-RAY PATTERN will be received simultaneously in all points of the IMAGE RECEPTION AREA.
Unless otherwise specified, this standard is applicable to an X-RAY TUBE ASSEMBLY with a brand-new ROTATING ANODE X-RAY TUBE.
This standard does not apply to X-RAY SOURCE ASSEMBLIES and X-RAY TUBE ASSEMBLIES for special applications, when for example steeper variations of the AIR KERMA RATE or particular distributions are intended.
1.2 Object
This standard describes a method for the determination of the greatest geometrically symmetrical RADIATION FIELD at a specified distance from the FOCAL SPOT for which the percentage AIR KERMA RATE along the major axes does not fall below a permitted value.
FIG. 1 Typical distribution of the relative AIR KERMA RATE along the major axis X of a maximum symmetrical RADIATION FIELD
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