Abstract
In this study, we compared the diagnostic performance of the standard SPECT with motion-frozen (MF) myocardial perfusion SPECT (MPS) in obese patients. Methods: A total of 90 consecutive obese patients (body mass index, 30.1-46.8, average, 34.3 6 3.6; age, 63 6 12 y; 30% women) underwent standard supine rest 201Tl/stress 99mTc dual-isotope gated MPS and cardiac catheterization within 3mo. MF images were obtained by nonlinear warping of cardiac phases to the end-diastolic position. Total perfusion deficit (TPD) was obtained for summed (S-TPD) and motion-frozen (MF-TPD) datasets with sex-specific standard and MF normal limits. Results: The area under the receiver-operating-characteristic (ROC) curve for detection of coronary artery disease (CAD) by MF-TPD was significantly larger than that for S-TPD (0.93 ± 0.25 vs. 0.88 ± 0.32, P < 0.05). MF-TPD had higher specificity (77% vs. 55%, P < 0.05) and accuracy (89% vs. 80%, P < 0.05) than did S-TPD. Conclusion: MF processing of MPS improves CAD detection in obese patients.
| Original language | English |
|---|---|
| Pages (from-to) | 1075-1079 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Medicine |
| Volume | 49 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2008 |
| Externally published | Yes |
Keywords
- Coronary artery disease
- Gated SPECT
- Image registration
- Image warping
- Motion correction
- Myocardial perfusion