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U.S. Department of Health and Human Services

Radiation-Emitting Products

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Radiation Output - Annual Quality Control Test

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Citation:

900.12(e)(5)(x)(A)(B): Radiation output.

(A) The system shall be capable of producing a minimum output of 4.5 mGy air kerma per second (513 milli Roentgen (mR) per second) when operating at 28 kVp in the standard mammography (moly/moly) mode at any SID where the system is designed to operate when measured by a detector with its center located 4.5 cm above the breast support surface with the compression paddle in place between the source and the detector. After October 28, 2002, the system, under the same measuring conditions shall be capable of producing a minimum output of 7.0 mGy air kerma per second (800 mR per second) when operating at 28 kVp in the standard (moly/moly) mammography mode at any SID where the system is designed to operate.

(B) The system shall be capable of maintaining the required minimum radiation output averaged over a 3.0 second period.

Questions:
  1. Radiation output must be measured "at any SID where the system is designed to operate." Does this mean that I must measure the output at all possible SID settings?
  2. Radiation output is to be measured over a 3 second period. Can exposures of less than 3 seconds meet the requirement as long as the total output meets the requirement?