The Effect of Attenuation Correction with CT on the Interpretation of Myocardial Perfusion SPECT: in Patients with Normal Coronary Angiogram.
- Author:
Kyung Ah CHUN
1
;
Ihn Ho CHO
;
Kyu Chang WON
;
Hyung Woo LEE
;
Geu Ru HONG
;
Dong Gu SHIN
;
Young Jo KIM
;
Bong Sup SHIM
Author Information
1. Department of Nuclear Medicine, Yeungnam University Hospital, Korea. ihcho@medical.yu.ac.kr
- Publication Type:Original Article
- Keywords:
Attenuation correction;
Myocardial perfusion SPECT;
Computed tomography
- MeSH:
Angiography;
Coronary Angiography;
Coronary Artery Disease;
Coronary Vessels;
Female;
Humans;
Liver;
Myocardium;
Perfusion*;
Tomography, Emission-Computed, Single-Photon*
- From:Korean Journal of Nuclear Medicine
2005;39(4):246-251
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: There has been many reports for the effect of attenuation correction on myocardial perfusion SPECT. We studied the effect of attenuation correction with CT (computed tomography) in patients with normal coronary angiography. MATERIALS AND METHODS: Fifteen patients with normal coronary artery on angiography and low likelihood of coronary artery disease were enrolled in this study (male: 6, female: 9, mean age: 58+/-8 year). Myocardial perfusion SPECT was done with Millennium VG with Hawkeye device (GE, SPECT/CT camera). A visual analysis and polar map quantification (Emory tool box) was performed. In quantitative analysis, percent uptake of each myocardial wall on polar map (percent of maximal uptake) was compared between non-corrected (NC) and corrected (AC) images. RESULTS: Visual analysis showed AC images led to an increase of uptake in the inferior wall, but decrease of uptake in the anterior wall, apex and septum. Liver activity is also increased in AC images. In quantitative analysis, the percent uptake is decreased in the anterior wall, apex and septum, but increased in the inferior wall. It is helpful to interpret the images in the inferior wall after AC, but difficult in the apex and anterior wall after AC. CONCLUSION: AC is helpful in the inferior wall. But in the apex or anterior wall, AC must be carefully applied to normal perfused myocardium.
