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To determine the clinical significance of this phenomenon, hepatic RT-DW images were reviewed.\nMethods: One hundred and five MR examinations, including RT-DWI, were assessed. The patient group included 62 non-cirrhotic and 43 cirrhotic individuals. All images were evaluated by mutual agreement of two radiologists from the viewpoints of incidence of pseudo-anisotropy and correlation between pseudo-anisotropy and the quality of trace images. The ADC of normal hepatic parenchyma of non-cirrhotic livers were measured in both areas with and without pseudo-anisotropy.\nResults: Pseudo-anisotropy was observed in 60% of non-cirrhotic (37/62) and 30% of cirrhotic (13/43) images. The difference between the two groups was statistically significant (P \u003c 0.001). The quality of trace images showed a tendency to worsen as pseudo-anisotropy became significant. 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Hepatic pseudo-anisotropy: a specific artifact in hepatic diffusion-weighted images obtained with respiratory triggering
http://hdl.handle.net/2241/98270
http://hdl.handle.net/2241/98270e4b90786-a1d5-4e45-b873-7559e21a48e1
名前 / ファイル | ライセンス | アクション |
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Magma_20-4.pdf (339.2 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2008-02-12 | |||||
タイトル | ||||||
タイトル | Hepatic pseudo-anisotropy: a specific artifact in hepatic diffusion-weighted images obtained with respiratory triggering | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Nasu, Katsuhiro
× Nasu, Katsuhiro× Kuroki, Yoshifumi× Fujii, Hirofumi× Minami, Manabu |
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著者別名 |
那須, 克宏
× 那須, 克宏× 南, 学 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Purpose: Hepatic pseudo-anisotropy is an artifact observed in hepatic diffusion-weighted imaging under respiratory triggering (RT-DWI). To determine the clinical significance of this phenomenon, hepatic RT-DW images were reviewed. Methods: One hundred and five MR examinations, including RT-DWI, were assessed. The patient group included 62 non-cirrhotic and 43 cirrhotic individuals. All images were evaluated by mutual agreement of two radiologists from the viewpoints of incidence of pseudo-anisotropy and correlation between pseudo-anisotropy and the quality of trace images. The ADC of normal hepatic parenchyma of non-cirrhotic livers were measured in both areas with and without pseudo-anisotropy. Results: Pseudo-anisotropy was observed in 60% of non-cirrhotic (37/62) and 30% of cirrhotic (13/43) images. The difference between the two groups was statistically significant (P < 0.001). The quality of trace images showed a tendency to worsen as pseudo-anisotropy became significant. However, the quality of trace images was generally satisfactory, with only two patients whose trace images were difficult to interpret due to pseudo-anisotropy. The areas with pseudo-anisotropy showed higher ADC than those without pseudo-anisotropy (P < 0.001). Conclusion: Pseudo-anisotropy is a type of artifact that originates from respiratory movement. Even though respiratory triggering is employed, ADC measurement of the liver is inaccurate because of pseudo-anisotropy, especially in non-cirrhotic patients. |
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書誌情報 |
Magnetic resonance materials in physics, biology and medicine 巻 20, 号 4, p. 205-211, 発行日 2007-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0968-5243 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10962689 | |||||
PubMed番号 | ||||||
識別子タイプ | PMID | |||||
関連識別子 | 17960439 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1007/s10334-007-0084-0 | |||||
権利 | ||||||
権利情報 | © ESMRMB 2007 | |||||
著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Springer Berlin | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/98270 | |||||
識別子タイプ | HDL | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf |