cardiac scan with slab misregistration artifact from missing data.

Some CT scanners still require multiple scans at sequential z-axis stations when scanning the heart with prospective triggering and step and shoot technique. During this type of scan, the scanner table has to start and stop its motion multiple times. During acceleration and deceleration, the patient's body may move slightly relative to the table. The patient can also be startled, inducing the patient to move their diaphragm involuntarily. As a result, gaps or redundancy of data may occur in the z-axis dimension. In this case, there is data missing. The heart moved slightly superiorly relative to the table after the first and second scans. Look closely at the midsegment of the LAD for the resulting artifact. This artifact is usually shown with a coronal MPR reconstruction. This is an attempt at 3D visualization. The pink planes are the first and last layers of the slabs at the slab interfaces made nearly opaque after reduction in voxel size after sub voxel sampling.
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