Region of Interest Analysis - Introduction
Regions of interest (ROIs) are can be used to compute statistics about
features that you see in a medical image. Typical uses for ROI
analysis include:
- Calculation of signal-to-noise ratio in quality assurance
programmes.
- Lesion area and volume computation for assessing disease status.
- Calculating ejection fraction in dynamic cardiac images.
- Selectively removing parts of the image, based on their intensity
characteristics, for the purposes of editing images.
Jim has eight types of ROI:
- Text annotation
- Marker
- Line
- Curved line
- Rectangular
- Elliptical
- Irregular, manually drawn
- Irregular, from contour following
Jim has sophisticated ROI editing facilities, that will
be easy-to-use for anyone familiar with modern presentation
packages.
Once defined, ROIs can be saved to disk, and later retrieved and
shown either in the same image, or in different images. The
statistics about the regions can similarly be saved to disk, in
a format suitable for importing into any spreadsheet program.
ROIs saved to disk include audit trail information, for use in
clinical trials, where it is important to know the history of
ROI creation and modification.
Start the ROI Toolkit from the Toolkits menu: 