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- W2029183768 abstract "Purpose To compare conspicuity of zones of ablation on nonenhanced, gadopentetate dimeglumine-(Gd-DTPA) and ferucarbotran-(SPIO)-enhanced magnetic resonance (MR) images. Materials and Methods In all, 33 radiofrequency ablations (RFA) were performed in 17 healthy porcine livers at 1.5T MR imaging 1 day and 2 and 4 weeks after RFA: T2-weighted (w) ultra turbo spin echo (UTSE), proton density (PD)-w UTSE, T1-w gradient echo (GRE) pre- and 5 minutes postcontrast administration, dynamic T1-w GRE during Gd-DTPA (Magnevist) or SPIO (Resovist) administration, T2-w UTSE, and PD-w UTSE sequences 10 minutes after SPIO administration. Regions of interest (ROIs) for contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR) were drawn in consensus by two radiologists. Results PD-w SPIO-enhanced images (23.5 ± 5.5) showed higher liver-to-lesion CNR than T1-w GRE Gd-DTPA-enhanced images (13.5 ± 6.1) 1 day after RFA (P ≤ 0.05). At all other timepoints, liver-to-lesion CNR of PD-w and T2-w SPIO-enhanced images did not differ significantly from T1-w GRE Gd-DTPA-enhanced images (P ≥ 0.05). Nonenhanced T2-w images revealed lower liver-to-lesion CNR (7.0 ± 7.5/6.5 ± 5.9/6.8 ± 5.0, 1 day/2 weeks/4 weeks, respectively) than T2-w SPIO-enhanced (17.4 ± 4.8/15.3 ± 4.5/14.2 ± 5.7), PD-w SPIO-enhanced (23.5 ± 5.5/16.9 ± 3.6, 1 day/2 weeks), and T1-w Gd-DTPA-enhanced (15.3 ± 3.6/12.7 ± 3.5, 2/4 weeks) images (P ≤ 0.05). Liver-to-lesion CNR of SPIO-enhanced dynamic T1-w GRE images after 30, 80, 150, and 240 seconds did not change significantly over time (P ≥ 0.05). Conclusion One day after RFA lesion conspicuity on PD-w ferucarbotran-enhanced images is better than on T1-w GRE Gd-DTPA-enhanced images. At all other timepoints, ferucarbotran is not superior to gadolinium. Ferucarbotran- and gadolinium-enhanced images improve lesion conspicuity compared with nonenhanced T2-w images at all timepoints. J. Magn. Reson. Imaging 2008;28:263–270. © 2008 Wiley-Liss, Inc." @default.
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- W2029183768 date "2008-07-01" @default.
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- W2029183768 title "Conspicuity of zones of ablation after radiofrequency ablation in porcine livers: Comparison of an extracellular and an SPIO contrast agent" @default.
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- W2029183768 doi "https://doi.org/10.1002/jmri.21423" @default.
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