Question

Compared to a CT scan protocol without iterative reconstruction applied, when using iterative reconstruction the scan parameter most likely to be reduced is _________.

1) mAs
2) matrix
3) pitch
4) scan field of view

Answer 1

The most likely scan parameter to be reduced when using iterative reconstruction in a CT scan protocol is mAs.

Step-by-step explanation:

The correct answer is mAs.

When using iterative reconstruction in a CT scan protocol, the scan parameter most likely to be reduced is the milliampere-seconds (mAs). Iterative reconstruction algorithms improve image quality by reducing noise, which allows for a reduction in mAs while maintaining image quality.

For example, let's say a CT scan without iterative reconstruction requires 100 mAs to produce an image of acceptable quality. With iterative reconstruction, the noise in the image is reduced, which means the same acceptable image quality can be achieved with a lower mAs value, such as 80 mAs.