What is helical scanning commonly referred to as?

Helical scanning is commonly referred to as spiral or volumetric scanning because it involves a continuous rotation of the X-ray tube around the patient while the table moves through the gantry. This motion creates a helical path, which allows for the acquisition of volumetric data rather than individual slices taken sequentially. The term "spiral" reflects the three-dimensional nature of the data produced, which enables reconstruction of cross-sectional images from different angles and depths. The ability to gather comprehensive data in a single breath-hold also enhances the speed and quality of imaging, making it distinct from traditional scanning methods that collect images slice by slice. This advancement has significantly improved the diagnostic capabilities of computed tomography, providing better visualization of anatomical structures.