관상동맥조영술상 정상소견을 보인 환자에서 전산화단층촬영술(CT)를 이용한 감쇠보정이 심근관류 SPECT 의 판독에 미치는 영향 (The Effect of Attenuation Correction with CT on the Interpretation of Myocardial Perfusion SPECT: in Patients with Normal Coronary Angiogram) |
Author |
천경아·조인호·원규장·이형우·홍그루1·신동구1·김영조1·심봉섭1, |
Kyung Ah Chun, M.D., Ihn Ho Cho, M.D., Kyu Chang Won, M.D., Hyung Woo Lee, M.D. Geu Ru Hong, M.D.1, Dong Gu Shin, M.D.1, Young Jo Kim, M.D.1, Bong Sup Shim, M.D.1 |
Affiliation |
영남대학교의료원 핵의학과, 순환기 내과1 Department of Nuclear Medicine and Interna1 Medicine1, Yeungnam University Hospital |
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¡¾8 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.(Korean J Nucl Med 39(4):246-251, 2005) |
Keyword |
Attenuation correction, Myocardial perfusion SPECT, Computed tomography |
Full text Article |
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