Masakatsu Tsurusaki1, Keitaro Sofue2, Hiromitsu Onishi3, Satoshi Goshima4, Atsushi Higaki5, Hiroyoshi Isoda6, Hiroki Haradome7, Kazunari Ishii8, Takamichi Murakami2. 1. Department of Radiology, Faculty of Medicine, Kindai University, 377-2, Ohnohigashi, Osaka-sayama, Osaka, 589-8511, Japan. mtsuru@dk2.so-net.ne.jp. 2. Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan. 3. Department of Radiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan. 4. Department of Radiology, Gifu University Graduate School of Medicine, Gifu, Gifu, Japan. 5. Department of Radiology, Kawasaki Medical School, Kurashiki, Okayama, Japan. 6. Department of Radiology, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan. 7. Department of Radiology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan. 8. Department of Radiology, Faculty of Medicine, Kindai University, 377-2, Ohnohigashi, Osaka-sayama, Osaka, 589-8511, Japan.
Abstract
PURPOSE: To identify predictive factors for truncation artifacts (TAs) in the arterial phase of Gd-EOB-DTPA-enhanced MRI in a multicenter study in Japan. MATERIALS AND METHODS: Data on patient factors (age, sex, weight, presence of viral hepatitis, and other conditions) and imaging parameters (e.g., triggering, voxel size, matrix, k-space ordering, acquisition time, reduction factor, flip angle, fat suppression, field strength, injection rate, and saline volume) were obtained. Univariate and multivariate analyses were performed to investigate the correlation of these parameters. RESULTS: We evaluated 1444 patients from 43 institutions who were scanned using GE, Siemens, Philips, or Toshiba MRI equipment (501, 354, 349, and 240 patients, respectively). The total incidence of TAs was 12.5% (17.2, 3.6, 15.7, and 12.1%, respectively). The matrix [odds ratio (OR) 0.13], flip angle (OR 5.77), use of fat suppression (OR 0.106), and field strength (OR 0.092) used in the Philips equipment significantly increased the incidence of TAs in MRI examination. CONCLUSIONS: The incidence of TAs in the arterial phase is influenced by several patient factors and imaging parameters. Especially, Siemens and Toshiba equipment had a significantly lower frequency of TAs. This indicates that such vendor-specific technology used in the dynamic sequence may have a TA-resistant effect.
PURPOSE: To identify predictive factors for truncation artifacts (TAs) in the arterial phase of Gd-EOB-DTPA-enhanced MRI in a multicenter study in Japan. MATERIALS AND METHODS: Data on patient factors (age, sex, weight, presence of viral hepatitis, and other conditions) and imaging parameters (e.g., triggering, voxel size, matrix, k-space ordering, acquisition time, reduction factor, flip angle, fat suppression, field strength, injection rate, and saline volume) were obtained. Univariate and multivariate analyses were performed to investigate the correlation of these parameters. RESULTS: We evaluated 1444 patients from 43 institutions who were scanned using GE, Siemens, Philips, or Toshiba MRI equipment (501, 354, 349, and 240 patients, respectively). The total incidence of TAs was 12.5% (17.2, 3.6, 15.7, and 12.1%, respectively). The matrix [odds ratio (OR) 0.13], flip angle (OR 5.77), use of fat suppression (OR 0.106), and field strength (OR 0.092) used in the Philips equipment significantly increased the incidence of TAs in MRI examination. CONCLUSIONS: The incidence of TAs in the arterial phase is influenced by several patient factors and imaging parameters. Especially, Siemens and Toshiba equipment had a significantly lower frequency of TAs. This indicates that such vendor-specific technology used in the dynamic sequence may have a TA-resistant effect.
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