SECTION 252:410-11-38. Source-to-skin distance measurement  


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  •   In a <1 MeV system, a means must be present to initially determine the source to skin distance, which is the distance between the focal point of the tube and the skin of the patient, to within 1 centimeter and to reproduce this measurement to within 2 millimeters thereafter.
[Source: Added at 17 Ok Reg 1136, eff 6-1-00]