900.12(b)(4)(i),(ii),(iii): Image receptor sizes.
(i) Systems using screen-film image receptors shall provide, at a minimum, for operation with image receptors of 18 x 24 centimeters (cm) and 24 x 30 cm.
(ii) Systems using screen-film image receptors shall be equipped with moving grids matched to all image receptor sizes provided.
(iii) Systems used for magnification procedures shall be capable of operation with the grid removed from between the source and image receptors.
- How many cassette/image receptor (IR) sizes must the facility have for each x-ray unit?
- How many moving grid sizes must facilities have for each x-ray unit?
- When doing magnification mammography, can a facility keep the grid in place but position the cassette on top of the patient support (to prevent the grid from interfering with the image) and still meet the requirement for doing magnification procedures with the grid removed?
- Does the term "image receptor" refer to the film, the cassette or the bucky (cassette holder)?
- We perform magnification using only the 18 X 24 cm image receptor. Do we have to show that all our other image receptor sizes also meet the magnification requirements?
- Our mammography unit has a single image receptor holder that can accommodate both the 24 X 30 cm and 18 X 24 cm image receptors, but has only one size grid. Is that acceptable?