Radiation-Emitting Products

Do all possible combinations of beam-limiting devices, image receptor sizes, target materials, and focal spots have to be tested during the annual x-ray field/light field/image receptor alignment quality control test?

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No. When performing the annual quality control test, the x-ray field/light field/image receptor alignment test must be performed only for those combinations of beam-limiting devices, image receptor sizes, target materials and focal spots used by the facility to produce full-field clinical images in the contact mode. For example, most facilities perform full-field clinical images using the large focal spot(s) in the contact mode. In this case, the alignment test has to be done only in the contact mode using the large focal spot(s). However, if, in addition to the large focal spot, the facility also routinely uses the small focal spot(s) to produce full-field clinical images in the contact mode, then the x-ray field/light field/image receptor alignment test must also be performed using the small focal spot(s). Facilities that only use the small focal spot to perform magnification or coned/spot images do not have to perform the alignment test in these configurations.

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Page Last Updated: 07/11/2014
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