Question

Which of the following can be changed retrospectively?

1) the slice thickness form an MDCT helical scan
2) slice overlap from a single-row detector scanner helical scan
3) pitch of a helical scan

Answer 1

The slice thickness, slice overlap, and pitch of helical scans can all be changed retrospectively in CT imaging.

Step-by-step explanation:

The slice thickness from an MDCT helical scan, the slice overlap from a single-row detector scanner helical scan, and the pitch of a helical scan can all be changed retrospectively.

For example, in MDCT helical scans, the slice thickness determines the distance between each image slice. By changing the slice thickness, a technician can adjust the level of detail captured in the CT images. Similarly, the slice overlap in a single-row detector scanner helical scan can be adjusted to ensure proper coverage and avoid gaps in the images.

Finally, the pitch of a helical scan refers to the distance the patient table travels per gantry rotation. By changing the pitch, a technician can control the spacing between slices and the speed at which images are acquired. These retrospective changes allow for greater flexibility in image acquisition and can be helpful in optimizing image quality for diagnostic purposes.