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ROC analysis of three perfusion display options for ECG-gated perfusion SPECT in severe CAD
T Leitha1, H Bailer, M Gwechenberger
1University Clinic Nuclear Medicine, Vienna. THOMAS.LEITHA@akh-wien.ac.at
Nuklearmedizin. Nuclear Medicine
|October 8, 1999
Summary
Three-dimensional (3D) perfusion mapping offers comparable diagnostic accuracy to traditional methods for assessing coronary artery stenosis, particularly for severe cases. Refinements are needed for optimal valve plane definition.
Area of Science:
- Nuclear Cardiology
- Medical Imaging Analysis
- Cardiovascular Diagnostics
Background:
- Assessing myocardial perfusion and ventricular wall motion simultaneously in a 3D model simplifies SPECT analysis.
- Validation of 3D perfusion mapping's accuracy for regional perfusion assessment is lacking.
Purpose of the Study:
- To evaluate the diagnostic accuracy of 3D perfusion mapping compared to conventional methods for coronary stenosis detection.
- To assess the regional performance of 3D mapping in specific ventricular wall segments.
Main Methods:
- Compared 3D perfusion mapping with ungated tomographic slices and polar mapping in 50 patients.
- Utilized correlation and ROC analysis against coronary angiography results.
- Assessed 8 ventricular segments using a 4-point scoring system.
Main Results:
- All methods showed comparable diagnostic performance for severe stenoses.
- Ungated tomographic slices provided the highest diagnostic gain for stenoses >59%.
- 3D mapping showed limitations in proximal anterior and distal lateral walls; polar mapping offered balanced regional performance.
Conclusions:
- 3D perfusion mapping provides comparable information to conventional displays, excelling in detecting severe stenoses.
- Further algorithmic improvements are necessary, especially for valve plane definition.
- Conventional and polar mapping demonstrated robust regional assessment.