|Policy number||Policy name||Policy date||Sunset date|
|PP 26-A||Use of Bismuth Shielding for the Purpose of Dose Reduction in CT Scanning||2/7/2012||12/31/2017|
|AAPM Board Vote - Closed on February 7, 2012|
Bismuth shields are easy to use and have been shown to reduce dose to anterior organs in CT scanning. However, there are several disadvantages associated with the use of bismuth shields, especially when used with automatic exposure control or tube current modulation. Other techniques exist that can provide the same level of anterior dose reduction at equivalent or superior image quality that do not have these disadvantages. The AAPM recommends that these alternatives to bismuth shielding be carefully considered, and implemented when possible.