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(m) The total exposure dose received by the patient for each fluoroscopic procedure must be recorded and maintained with the patient’s diagnostic record, or if this information is not available, the exposure parameters used must be recorded, such as kVp, mA, and total exposure time. (Eff. 4/9/2009, Register 190) Statutory Authority: Authority: AS 18.60.475 AS 18.60.485 7 AAC 18.450. Medical radiographic installation. (a) A medical radiographic installation must use a diagnostic type protective x-ray tube housing and must meet the requirements of this section. (b) Medical radiographic equipment must define the useful beam with a diaphragm, cone, or adjustable collimator capable of restricting the beam to the area of clinical interest, providing the same degree of attenuation as is required of the protective tube housing. These devices must be calibrated in terms of the size of the projected useful beam at specified source-film distances and must limit the target-to-skin distance to not less than 12 inches (30 centimeters). (c) Radiographic equipment must be equipped with adjustable collimators and light localizers to define the entire field and produce a visible indication of adequate collimation and alignment on the x-ray film. Field size indication on adjustable collimators must be accurately aligned with the x-ray field to within two percent of the source-image receptor-distance (SID) at all possible positions of the x-ray tube, except when positive beam limitation is functional, in use, and a health physics survey confirms that the positive beam limitation confines the beam to within two percent of the SID. (d) Except when contraindicated for a particular medical purpose, the aluminum equivalent of the total filtration in the useful beam may not be less than 0.5 millimeters for equipment operating below 50 kVp; may not be less than 1.5 millimeters for equipment operating from 50 kVp to 70 kVp; and may not be less than 2.5 millimeters for equipment operating above 70 kVp. If the filter in the machine is not accessible for examination or the total filtration is unknown, the requirements of this section are met if the half-value layer of the useful beam is not less than that listed for “Other X-Ray Systems” in Table I of 21 C.F.R. 1020.30(m), as revised as of April 1, 2008, and adopted by reference. (e) A device must automatically terminate the exposure after a preset time or exposure.