In medical imaging, what does the abbreviation ROI denote?

A region of interest (ROI) is a subset of an image or a dataset identified for a particular purpose.

Regarding the region of interest (ROI) as two- or three-dimensional range is common in computer-controlled image processing. In extreme cases, for a time span there occurs even a four-dimensional view. Often the region of interest is used in medical applications, especially in nuclear medicine. The procedure is also used in computer tomography (commonly referred to as a CT scan). In this case, the ROIs are multidimensional.

ROI is most commonly used for medical imaging. When the movement of an organ has an ROI, how the object moves during a specific time or period of time may be the ROI for either a doctor’s diagnosis or a researcher’s study. The region of interest may be determined manually or by means of evaluation software.