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Diffusion-weighted echo planar imaging in patients with recent myocardial infarction.

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Title: Diffusion-weighted echo planar imaging in patients with recent myocardial infarction.
Authors: Deux JF (AUTHOR), Maatouk M (AUTHOR), Vignaud A (AUTHOR), Luciani A (AUTHOR), Lenczner G (AUTHOR), Mayer J (AUTHOR), Lim P (AUTHOR), Dubois-Randé JL (AUTHOR), Kobeiter H (AUTHOR), Rahmouni A (AUTHOR), Deux, Jean-François1 (AUTHOR), Maatouk, Mezri (AUTHOR), Vignaud, Alexandre (AUTHOR), Luciani, Alain (AUTHOR), Lenczner, Grégory (AUTHOR), Mayer, Julie (AUTHOR), Lim, Pascal (AUTHOR), Dubois-Randé, Jean-Luc (AUTHOR), Kobeiter, Hicham (AUTHOR), Rahmouni, Alain (AUTHOR)
Source: European Radiology. Jan2011, Vol. 21 Issue 1, p46-53. 8p.
Abstract: Objective: To evaluate a diffusion-weighted (DW) black blood MR sequence for the detection of myocardium signal abnormalities in patients with recent myocardial infarction (MI).Methods: A DW black blood EPI sequence was acquired at 1.5 T in 12 patients with recent MI. One slice per patient was acquired with b=0 and b=50 s/mm2. A standard short tau inversion recovery (STIR) T2-weighted sequence was acquired at the same level. Viability was assessed with delayed-enhancement sequences. Images were analyzed qualitatively and quantitatively. A non parametric Wilcoxon test was used for statistical analysis, with a significance level of P<.05.Results: The mean quality of blood suppression was higher on DW EPI images than on STIR T2-weighted images (3.9±0.3 and 3.0±0.7, respectively; P=0.01). Myocardial high signal areas were detected in respectively 100% (12/12) and 67% (8/12) of the patients on DW EPI and STIR T2-weighted images. The four patients (33%) with false-negative STIR T2 findings all had high signal areas on DW EPI images corresponding to the location of the MI on the delayed-enhanced images.Conclusion: DW EPI sequences are a feasible alternative to standard STIR T2-weighted sequences for detecting myocardium high signal areas in patients with recent MI. [ABSTRACT FROM AUTHOR]
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Abstract:<bold>Objective: </bold>To evaluate a diffusion-weighted (DW) black blood MR sequence for the detection of myocardium signal abnormalities in patients with recent myocardial infarction (MI).<bold>Methods: </bold>A DW black blood EPI sequence was acquired at 1.5 T in 12 patients with recent MI. One slice per patient was acquired with b=0 and b=50 s/mm2. A standard short tau inversion recovery (STIR) T2-weighted sequence was acquired at the same level. Viability was assessed with delayed-enhancement sequences. Images were analyzed qualitatively and quantitatively. A non parametric Wilcoxon test was used for statistical analysis, with a significance level of P<.05.<bold>Results: </bold>The mean quality of blood suppression was higher on DW EPI images than on STIR T2-weighted images (3.9±0.3 and 3.0±0.7, respectively; P=0.01). Myocardial high signal areas were detected in respectively 100% (12/12) and 67% (8/12) of the patients on DW EPI and STIR T2-weighted images. The four patients (33%) with false-negative STIR T2 findings all had high signal areas on DW EPI images corresponding to the location of the MI on the delayed-enhanced images.<bold>Conclusion: </bold>DW EPI sequences are a feasible alternative to standard STIR T2-weighted sequences for detecting myocardium high signal areas in patients with recent MI. [ABSTRACT FROM AUTHOR]
ISSN:09387994
DOI:10.1007/s00330-010-1912-6