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KMID : 0363819950290010041
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Korean Journal of Nuclear Medicine
1995 Volume.29 No. 1 p.41 ~ p.47
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Artifactual Perfusion Defects due to the Parameters of Reconstruction Filter in Tc-99m-MIBI Myocardial SPECT Images
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곽철은
이경한/이동수/박용우/정준기/이명철/서정돈/고창순
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Abstract
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Tc-99m-MIBI(Sestamibi) myocardial SPECT along with T1-201 tomographic imaging has demonstrated wide application and high image quality sufficient for the diagnosis of myocardial perfusion defect, which consequently reflects regional myocardial
blood
flow. The qualitative values of myocardial SPECT with Tc-99m-MIBI as well as the quantitative cases depend in some degree on the reconstruction techniques of multiple projections Filtered backprojection(FBP) is the common standard for
reconstruction
rather than the complicated and time-consuming arithmetic methods. In FBP it is known that the distribution of radioactivity in reconstructed transverse slices varies with the selected filter parameters such as cutoff frequencies and
order(Butterworth
case). The cutoff frequencies basically remove and decrease the true radioactive distribution and alter the pixel counts, which lead to underestimation of true counts in specific myocardial regions.
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KEYWORD
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