Three-dimensional cardiac image fusion using new CT angiography and SPECT methods

Area of Science:

• Cardiovascular Imaging
• Medical Physics
• Radiology

Background:

• Coronary artery disease (CAD) diagnosis relies on visualizing coronary anatomy and myocardial perfusion.
• Integrating data from different imaging modalities can provide a more comprehensive assessment.

Purpose of the Study:

• To develop a novel method for fusing coronary computed tomography angiography (CCTA) and single-photon emission computed tomography (SPECT) myocardial perfusion imaging.
• To assess the utility of fused CCTA and SPECT images in evaluating patients with ischemic heart disease.

Main Methods:

• Developed a fusion technique combining CCTA and SPECT data.
• Utilized 3D volume-rendering and a computer workstation with specialized software for image fusion.
• Applied the method to four patients with suspected or known ischemic heart disease.

Main Results:

• Successfully generated 3D volume-rendered fused images from CCTA and SPECT data.
• The fused images clearly depicted the anatomical location of coronary arteries in relation to myocardial perfusion territories.
• Abnormal perfusion areas were accurately localized in all evaluated patients.

Conclusions:

• The developed fusion method provides a clear visualization of the relationship between coronary arteries and perfusion defects.
• Fused CCTA and SPECT imaging is a valuable tool for the comprehensive evaluation of coronary artery disease.
• This technique enhances the assessment of ischemic heart disease by integrating anatomical and functional information.