Editor: The authors of "Digital Pelvic Radiology: Increase Distance to Reduce Dose" (September/October 2011; Vol. 83, No. 1) are to be commended for their illumination of the advantages of higher SID radiographic projections. Historically, the standard supine SID has progressed from 36 in to 40 in, and some collimator numerical scales even indicated a 44-in distance. This report acknowledged ceiling height and other distance restrictions that inhibit converting to an increased SID. Now, with the advent of elevating radiographic tables, their mechanics do allow for the easy conversion to an increased SID routine for all examinations, including upright imaging.
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