Section He-P 4046.02 - Fluoroscopic X-ray Systems - General Requirements(a) All fluoroscopic x-ray systems used shall be image intensified or equipped with direct digital receptors.(b) The fluoroscopic imaging assembly shall be provided with a primary protective barrier which intercepts the entire cross-section of the useful beam at any SID.(c) The x-ray tube used for fluoroscopy shall not produce x-rays unless the barrier is in position to intercept the entire useful beam.(d) X-ray production in the fluoroscopic mode shall be controlled by a device which requires continuous pressure by the fluoroscopist for the entire time of any exposure.(e) When recording serial fluoroscopic images, the fluoroscopist shall be able to terminate the x-ray exposure(s) at any time.(f) A means may be provided to permit completion of any single exposure of the series in progress.(g) Beam limiting devices manufactured after May 22, 1979, and incorporated in equipment with a variable SID or a visible area of greater than 300 square centimeters shall provide stepless adjustment of the x-ray field.(h) All equipment with a fixed SID and a visible area of 300 square centimeters or less shall be provided with: (1) Stepless adjustment of the x-ray field; or(2) With means to further limit the x-ray field size at the plane of the image receptor to 125 square centimeters.(i) If provided, stepless adjustment shall, permit continuous field size adjustments down to a minimum field size no greater than 5 centimeters in either length or diameter at maximum SID.(j) For rectangular x-ray fields used with circular image receptors, the error in alignment shall be determined along the length and width dimensions of the x-ray field which pass through the center of the visible area of the image receptor.(k) Fluoroscopic spot-film devices shall meet the following requirements: (1) Means shall be provided between the source and the patient for adjustment of the x-ray field size in the plane of the image receptor to the size of that portion of the image which has been selected on the spot-film selector;(2) The adjustment required in He-P 4046.02(1) (1) shall be automatically accomplished except when the x-ray field size in the plane of the image receptor is smaller than that of the selected portion of the image receptor;(3) It shall be possible to adjust the x-ray field size in the plane of the image receptor to a size smaller than the selected portion of the image receptor;(4) The minimum field size at the maximum SID shall be no larger than 5 centimeters in either length or diameter; and(5) The center of the x-ray field in the plane of the image receptor shall be aligned with the center of the selected portion of the image receptor to not more than 2 percent of the SID.(l) If means exist to override any of the automatic x-ray field size adjustments required in He-P 4046.02(g) through (l) , that means: (1) Shall be designed for use only in the event of system failure;(2) Shall incorporate a signal visible at the fluoroscopist's position which will indicate whenever the automatic field size adjustment is overridden; and(3) Shall be clearly and durably labeled: "FOR X-RAY FIELD LIMITATION SYSTEM FAILURE".
N.H. Code Admin. R. He-P 4046.02
#6827, eff 8-6-98; ss by #8692, INTERIM, eff 7-27-06, EXPIRES: 2-2-07; ss by #8808, eff 1-24-07
Amended byVolume XXXV Number 06, Filed February 12, 2015, Proposed by #10763, Effective 1/23/2015, Expires7/22/2015.Amended by Volume XXXV Number 32, Filed August 13, 2015, Proposed by #10893, Effective 7/21/2015, Expires7/21/2025.