28 Pa. Code § 137.25
The medical staff shall establish written policies for the performance of diagnostic radiologic examinations of known or suspected pregnant patients, for the purpose of control of excessive radiation to fetus and mother. These policies shall be available to all appropriate personnel and shall be reviewed by the medical staff at least once annually for possible revision. A written request for a diagnostic radiologic examination of a female patient of childbearing age shall be marked in such a way as to clearly indicate to the person taking the roentgenogram the date of the patient's last menstrual period or the fact that the patient may be pregnant.
28 Pa. Code § 137.25
The provisions of this § 137.25 issued under section 2102(g) of The Administrative Code of 1929 (71 P. S. § 532(g)); and section 803 of the Health Care Facilities Act (35 P. S. § 448.803).