Radiation-Emitting Products

Decompression - Annual Quality Control Test

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900.12(e)(5)(xi)(A)(B)(C): Decompression. If the system is equipped with a provision for automatic decompression after completion of an exposure or interruption of power to the system, the system shall be tested to confirm that it provides:

(A) An override capability to allow maintenance of compression;

(B) A continuous display of the override status; and

(C) A manual emergency compression release that can be activated in the event of power or automatic release failure.

Approved Alternative Standard:
  1. We have a DMR unit in which the automatic decompression override status is displayed only under certain conditions, does this still meet the requirement to be continuously displayed?
  2. Our unit's automatic decompression mechanism has been deactivated and can't be reactivated by anyone at the facility. Does its status still have to be continuously displayed?
  3. Must all mammography units have an emergency compression release?
  4. The regulations state that while in automatic decompression override status, mammography equipment must provide "maintenance of compression" after completion of an exposure or in case of a power interruption. What degree of compression and for how long must it be maintained?


Page Last Updated: 01/22/2015
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