대한핵의학회지 (1967년~2009년)
대한핵의학회지 2001;35(1)33~10
원저 / 게이트 Tc-99m 심근관류 SPECT에서 산란보정이 심근관류 및 좌심실기능평가에 미치는 영향 ( Effects of Scatter Correction on the Assessment of Myocardial Perfusion and Left Ventricular Function by gated Tc-99m Myocardial SPECT )
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Author 정환정(Hwan Jeong Jeong),손혜경(Hye Kyung Son),범희승(Hee Seung Bom),
Affiliation
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. (Korean J Nucl Med 2001;35:33-42)

Keyword Tc-99m myocardial SPECT, dual energy window scatter correction, image contrast.
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