A collection of slices with the same orientation. Multi-stack acquisitions are possible when the stack parameter is greater than one, for example in lumbar spine CT exams with individual angulation (oblique) for every disc.

Multiplanar reconstruction or reformatting is a post-processing technique to create new images from a stack of images in planes other than that of the original stack.
The use of thin slices increases the spatial resolution in the scan axis direction, allowing a high spatial resolution in all planes. Isotropic resolution results in high quality multiplanar and 3D reconstructions which are of particular benefit in CT angiography and virtual colonoscopy studies.

A plane or section not perpendicular to the xyz coordinate system, such as long and short axis views of the heart.

See also Orientation, Mediolateral-Oblique View, Lateral View, Lateromedial, Breast Imaging, and Stack.