§ 221.75. Spot checks.

 Spot checks shall be performed on X-ray systems capable of operation at greater than 150 kVp. The spot checks shall meet the following requirements:

   (1)  The procedures shall be in writing and shall have been developed by a qualified expert for radiation therapy calibration.

   (2)  If a radiological physicist does not perform the spot check measurements, the results of the spot check measurements shall be reviewed by a radiological physicist within 15 days.

   (3)  The measurements taken during the spot checks shall demonstrate the degree of consistency of the operating characteristics which can affect the radiation output of the X-ray system.

   (4)  The spot-check procedure shall specify the frequency at which tests or measurements are to be performed and the acceptable tolerance for each parameter measured in the spot check when compared to the value for that parameter determined in the calibration specified in §  221.74 (relating to calibration).

   (5)  The procedure shall also note conditions which require that the system be recalibrated under §  221.74.

   (6)  Records of spot-check measurements performed under this section shall be maintained by the registrant for 5 years following the measurement.

   (7)  Spot check measurements shall be performed using a dosimetry system that has been calibrated under §  221.74(c). Alternatively, a dosimetry system used solely for spot check measurements may be calibrated by direct intercomparison with a system that has been calibrated under §  221.74(c). The alternative calibration method shall have been performed within the previous year and after each servicing that may have affected the system calibration.


   The provisions of this §  221.75 issued under section 302 of the Radiation Protection Act (35 P.S. §  7110.302); and section 1920-A of The Administrative Code of 1929 (71 P.S. §  510-20); amended under sections 301 and 302 of the Radiation Protection Act (35 P.S. § § 7110.301 and 7110.302); and section 1920-A of The Administrative Code of 1929 (71 P.S. §  510-20).


   The provisions of this §  221.75 adopted December 18, 1987, effective December 19, 1987, 17 Pa.B. 5235; amended July 16, 2004, effective July 17, 2004, 34 Pa.B. 3823. Immediately preceding text appears at serial pages (249310) to (249311).

Cross References

   This section cited in 25 Pa. Code §  216.1 (relating to purpose and scope); and 25 Pa. Code §  216.3 (relating to exemptions).

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