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  • Title: Usefulness of the application of the BLADE technique to reduce motion artifacts on navigation-triggered prospective acquisition correction (PACE) T2-weighted MRI (T2WI) of the liver.
    Author: Nanko S, Oshima H, Watanabe T, Sasaki S, Hara M, Shibamoto Y.
    Journal: J Magn Reson Imaging; 2009 Aug; 30(2):321-6. PubMed ID: 19629991.
    Abstract:
    PURPOSE: To evaluate the effects of the application of the BLADE (Siemens, Siemens Medical Systems, Erlangen, Germany) technique, a technique to reduce motion artifacts, on navigator-triggered prospective acquisition correction (PACE) T2-weighted MRI (T2WI) of the liver. MATERIALS AND METHODS: Twenty-three consecutive patients with a total of 57 localized hepatic diseases (39 malignant, 18 benign) and 57 patients without hepatic lesion underwent MR study during eupnea. The images were assessed quantitatively by calculating the liver-lesion contrast. Two subjective analyses were also performed. Two observers independently assessed the image quality and the confidence level of the detection and characterization of hepatic nodules using a five-point scale. Statistical analysis was performed with the Wilcoxon matched-pairs test except for the diagnostic performance evaluated with jackknife alternative free-response receiver operating characteristic (JAFROC) analysis. RESULTS: There was no significant difference in the mean liver-lesion contrast between the PACE T2WI with BLADE (T2WI-BLADE) (mean +/- SD = 0.29 +/- 0.14) and that without BLADE (0.30 +/- 0.14) (P = 0.39). Visual assessment of PACE T2WI-BLADE (4.8 +/- 0.47) was superior to that without BLADE (4.3 +/- 0.8) (P < 0.0001), although there were no significant differences in detecting and characterizing hepatic lesions using JAFROC analysis. CONCLUSION: The BLADE technique could improve image quality by reducing motion artifacts on hepatic MRI without affecting the diagnostic performance.
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