Improved computer definition of regions of interest by using a double-cursor method

Area of Science:

• Medical Imaging
• Computer Science
• Nuclear Medicine

Background:

• Accurate delineation of organ boundaries is crucial for quantitative analysis in radionuclide imaging.
• Single images may not always display the complete organ outline, complicating region of interest (ROI) definition.
• Existing methods for ROI definition can be time-consuming or imprecise.

Purpose of the Study:

• To develop and implement an improved method for defining regions of interest (ROIs) in radionuclide studies.
• To address the challenge of incomplete organ visibility on single imaging frames.
• To enhance the accuracy and efficiency of cardiac radionuclide study analysis.

Main Methods:

• A novel method was developed utilizing a double cursor that moves simultaneously across two images.
• The technique leverages specialized FORTRAN-callable subroutines for display access and image manipulation.
• This approach facilitates the combined use of information from multiple views for ROI definition.

Main Results:

• The developed double-cursor method enables precise definition of organ boundaries, even when not fully visible on a single image.
• The technique has been successfully integrated into routine clinical workflows.
• Specifically, it is now standard for defining the left-ventricular ROI in radionuclide cardiac studies.

Conclusions:

• The double-cursor method offers a robust solution for defining complex regions of interest in radionuclide imaging.
• This approach significantly improves the accuracy of quantitative analysis, particularly in cardiac studies.
• The method's routine implementation demonstrates its practical utility and effectiveness in nuclear medicine.