Korean J Nucl Med.  2001 Feb;35(1):33-42.

Effects of Scatter Correction on the Assessment of Myocardial Perfusion and Left Ventricular Function by gated Tc-99m Myocardial SPECT

• Jeong HJ
• Son HK
• Bom HS

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.

Keyword

Tc-99m myocardial SPECT; dual energy window scatter correction; image contrast

MeSH Terms

Chest Pain
Coronary Artery Disease
Healthy Volunteers
Humans
Memory
Perfusion*
Tomography, Emission-Computed, Single-Photon*
Ventricular Function, Left*