| Impact of CT attenuation correction by SPECT/CT in brain perfusion images. | |
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MedLine Citation:
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PMID: 22278350 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: The aim of this study was to elucidate the regional differences between brain perfusion single photon emission computed tomography (SPECT) images reconstructed with a uniform attenuation correction using Chang's method (AC-Chang) and a non-uniform attenuation correction with CT using SPECT/CT (AC-CT). METHODS: SPECT images of a phantom with and without head holder were obtained, and reconstructed images of AC-Chang and AC-CT were compared. Twenty-eight consecutive patients with brain disease examined by SPECT/CT brain perfusion imaging were selected, and images were reconstructed with AC-Chang and AC-CT. The AC-Chang and AC-CT reconstructed images were then compared by voxel-based analysis using three-dimensional stereotactic surface projections. RESULTS: Counts in the frontal area of the AC-Chang phantom image with head holder were higher than those in the posterior area. Counts in the frontal area of the AC-Chang clinical images were significantly higher than those in the AC-CT images, while the counts in the margin of the frontal lobe and posterior margin of the parietal, occipital cortices and cerebellum of the AC-Chang images were significantly lower. Relative frontal perfusion was 5.0% higher and relative cerebellar perfusion was 4.6% lower in the AC-Chang images relative to the AC-CT images, on average. CONCLUSION: We demonstrated the frontal dominant hyper-perfusion and parieto-occipital and cerebellar hypo-perfusion in brain SPECT images reconstructed with AC-Chang compared to those reconstructed with AC-CT. We suggest that to obtain an accurate attenuation-corrected brain perfusion SPECT image, attenuation correction by Chang's method is inadequate. |
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Authors:
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Kazunari Ishii; Kohei Hanaoka; Masahiro Okada; Seishi Kumano; Yoshihiro Komeya; Norio Tsuchiya; Makoto Hosono; Takamichi Murakami |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-26 |
Journal Detail:
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Title: Annals of nuclear medicine Volume: - ISSN: 1864-6433 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8913398 Medline TA: Ann Nucl Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Radiology, Kinki University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan, kishii@hbhc.jp. |
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