SECTION 310:281-11-5. Radiographic entrance exposure limits

  The in-air exposure determined for the technique used for the specified average human adult patient thickness for routine medical radiography shall not exceed the entrance exposure or dose limits shown in 310:281-11-5.

(1)   Entrance exposure and dose limits for the following radiographic technique are:

(A)   for a 23 cm P/A chest has the suggested exposure of 22 mR and the exposure/dose limit of 30 mR;

(B)   for a 23 cm P/A grid chest has the suggested exposure of 25 mR and the exposure/dose limit of 35 mR;

(C)   for a 23 cm abdomen(KUB) has the suggested exposure of 500 mR and the exposure/dose limit of 600 mR;

(D)   for a 23 cm lumbar spine (A/P) has the suggested exposure of 500 mR and the exposure/dose limit of 800 mR;

(E)   for a 13 cm cervical spine (AP) has the suggested exposure of 125 mR and the exposure/dose limit of 200 mR;

(F)   for a 15 cm skull (lateral) has the suggested exposure of 150 mR and the exposure/dose limit of 250 mR;

(G)   dental intraoral exams have a suggested exposure of 400 mR and the exposure/dose limit of 600 mR; and

(H)   for computed tomography suggested exposures for the following techniques are:

(i)   for a 16 cm adult head the suggested exposure is 6000 mR;

(ii)   for a 32 cm adult abdomen the suggested exposure is 3500 mR; and

(iii)   for a 16 cm pediatric abdomen the suggested exposure is 2500 mR.

(iv)   These are CTDIw dose measurements as recommended by the American College of Radiology in their voluntary certification of CT system.

(v)   These are suggested exposures only and are meant to be general guidelines.

[Source: Added at 8 Ok Reg 3503, eff 8-15-91 (emergency); Added at 9 Ok Reg 1643, eff 5-29-92; Amended at 21 Ok Reg 1037, eff 5-13-04]