This document applies to X- RAY TUBE ASSEMBLIES and to FILTERING MATERIAL , in medical diagnostic applications up to a HIGH VOLTAGE of 1 50 kV. For HIGH VOLTAGES greater than 50 kV, this document applies to X- RAY TUBE ASSEMBLIES with tungsten or tungsten-alloy TARGETS only.
NOTE 1 The FILTERING MATERIAL in the X- RAY BEAM can be removable or irremovable; it can be positioned in any orientation or can have any shape (e.g. tapering thickness) – although usually plane-parallel material, perpendicular to the REFERENCE AXIS is applied. Examples of FILTERING MATERIALS are ADDED FILTERS , a PATIENT table (in case of an under-table X- RAY TUBE ASSEMBLY ), materials in the BEAM LIMITING DEVICE , or a breast COMPRESSION DEVICE
