"In sequential scanning, the patient is moved forward along the longitudinal axis of the CT scanner, pausing at intervals to allow a trans-axial image to be captured at each position along the axis."
"Helical scanners now comprise the vast majority of the installed CT base globally. However, helical scanners are also capable of sequential scanning, usually called "axial acquisition" in this context. Axial acquisitions are commonly used for head exams to minimise some helical artifacts, and are used in some gated cardiac exams. Axial acquisitions on modern scanners do allow reformatted images (e.g. sagittal, coronal, MIP), and can result in reduced dose compared to helical because they do not involve overranging."
Expected headings
"Physical principles"
"Limitations"