Effects of Scatter Correction on the Assessment of Myocardial Perfusion and Left Ventricular Function by gated Tc-99m Myocardial SPECT.
- Author:
Hwan Jeong JEONG
;
Hye Kyung SON
;
Hee Seung BOM
- Publication Type:Original Article
- Keywords:
Tc-99m myocardial SPECT;
dual energy window scatter correction;
image contrast
- MeSH:
Chest Pain;
Coronary Artery Disease;
Healthy Volunteers;
Humans;
Memory;
Perfusion*;
Tomography, Emission-Computed, Single-Photon*;
Ventricular Function, Left*
- From:Korean Journal of Nuclear Medicine
2001;35(1):33-42
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The purpose of this study was to evaluate the effect of scatter correction on the assessment of myocardial perfusion and left ventricular function by gated Tc-99m myocardial SPECT. MATERIALS AND METHODS: Subjects were 11 normal volunteers, 20 patients with non-cardiac chest pain and 13 patients with coronary artery diseases. We classified above 3 groups into normal and diseased groups. Scatter correction was done using dual-energy-window scatter correction method (DEW-SC). We compared acquired counts, image contrast, corrected maximum relative counts, indices of left ventricular function, extent and severity of perfusion defects calculated by 'CEqual program' between scatter non-corrected and corrected images. RESULTS: Scatter corrected studies was lower in counts by 18+/-3% than uncorrected studies, but image contrast were improved in all cases. Scatter correction using DEW-SC took 3 minutes to complete, and 512 kB memory to store. There were no significant differences among indices of left ventricular function between scatter non-corrected and corrected images. Although extents of perfusion defects were not significantly different, severity was severer in scatter corrected images. CONCLUSION: Scatter correction using DEW-SC is simple to do, and improves image contrast without changing other indices of myocardial perfusion and function.
