900.12(e)(4) (iii)(A)(B): Semiannual quality control tests. Facilities with screen-film systems shall perform the following quality control tests at least semiannually:
(iii) Compression device performance.
(A) A compression force of at least 111 newtons (25 pounds) shall be provided.
(B) Effective October 28, 2002, the maximum compression force for the initial power drive shall be between 111 newtons (25 pounds) and 200 newtons (45 pounds).
- Several mammography units have initial compression devices that generate more than 45 pounds of pressure. Will they have to be replaced or modified?
- When I perform the semiannual compression QC test, our unit’s initial power drive provides an initial compression force of 37 pounds. However, it cannot maintain that force. The force decreases to less than 25 pounds in approximately 1 second. How long does the initial power drive have to maintain a force of at least 25 pounds?
- Is tapping the foot control of the initial power drive compression device more than once acceptable when testing initial power drive performance in computer-controlled compression devices?