//(4) Fluoroscopy and radiography using the fluoroscopic imaging assembly with inherently ''circular'' image receptors//

* (i) For fluoroscopic equipment manufactured //''before June 10, 2006''//, other than radiation therapy simulation systems, the following applies:

** (A) Neither the length nor the width of the x-ray field in the plane of the image receptor shall exceed that of the visible area of the image receptor by more than 3 percent of the SID. The sum of the excess length and the excess width shall be no greater than 4 percent of the SID.

** (B) 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.

* (ii) For fluoroscopic equipment manufactured ''//on or after June 10, 2006//'', other than radiation therapy simulation systems, the maximum area of the x-ray field in the plane of the image receptor shall conform with one of the following requirements:

** (A) When any linear dimension of the visible area of the image receptor measured through the center of the visible area is //''less than or equal to 34 cm''// in any direction, at least 80 percent of the area of the x-ray field overlaps the visible area of the image receptor, or

** (B) When any linear dimension of the visible area of the image receptor measured through the center of the visible area is //''greater than 34 cm in any direction''//, the x-ray field measured along the direction of greatest misalignment with the visible area of the image receptor does not extend beyond the edge of the visible area of the image receptor by more than 2 cm.
bag
fda_public
created
Fri, 20 Nov 2015 10:41:50 GMT
creator
dirkjan
modified
Fri, 20 Nov 2015 10:54:36 GMT
modifier
dirkjan