What technique is used to create additional images in various planes from a 3D data set?

Multi-Planar Reconstruction (MPR) is a technique that allows the creation of images in multiple planes from a three-dimensional data set. This is particularly valuable in MRI, as it helps visualize the anatomical structures in different orientations, such as axial, coronal, and sagittal, without the need to re-scan the patient.

MPR utilizes the volumetric data acquired during a 3D imaging sequence and processes it to generate cross-sectional images in various planes. This capability enhances diagnostic accuracy by providing diverse perspectives of the anatomy, which is especially useful for examining complex structures and potential pathologies.

In contrast, the other techniques listed serve different purposes. Subtraction is primarily used to enhance the visibility of certain features by removing background information, while Maximum Intensity Projection displays only the highest intensity values along projection lines, which is useful for highlighting specific structures like blood vessels. Region of Interest (ROI) calculations facilitate measurements and evaluations of specific areas within an image but do not manipulate the orientation of images themselves.