Subtractionless first-pass single contrast medium dose peripheral MR angiography using two-point Dixon fat suppression

European Radiology - Tập 23 - Trang 2228-2235 - 2013
Tim Leiner1,2, Jesse Habets1, Bastiaan Versluis3, Liesbeth Geerts4, Eveline Alberts4, Niels Blanken1, Jeroen Hendrikse1, Evert-Jan Vonken1, Holger Eggers5
1Department of Radiology, Utrecht University Medical Center, Utrecht, The Netherlands
2Department of Radiology, E.01.132, Utrecht University Medical Center, Utrecht, The Netherlands
3Department of Radiology, Maastricht University Medical Center +, Maastricht, the Netherlands
4Clinical Science Division, Philips Healthcare, Best, The Netherlands
5Philips Research, Hamburg, Germany

Tóm tắt

To investigate the feasibility of subtractionless first-pass single contrast medium dose (0.1 mmol/kg) peripheral magnetic resonance angiography (MRA) at 1.5 T using two-point Dixon fat suppression and compare it with conventional subtraction MRA in terms of image quality. Twenty-eight patients (13 male, 15 female; mean age ± standard deviation, 66 ± 16 years) with known or suspected peripheral arterial disease underwent subtractionless and subtraction first-pass MRA at 1.5 T using two-point Dixon fat suppression. Results were compared with regard to vessel-to-background contrast. A phantom study was performed to assess the signal-to-noise ratio (SNR) of both MRA techniques. Two experienced observers scored subjective image quality. Agreement regarding subjective image quality was expressed in quadratic weighted κ values. Vessel-to-background contrast improved in all anatomical locations with the subtractionless method versus the subtraction method (all P < 0.001). Subjective image quality was uniformly higher with the subtractionless method (all P < 0.03, except for the aorto-iliac arteries for observer 1, P = 0.052). SNR was 15 % higher with the subtractionless method (31.9 vs 27.6). This study demonstrates the feasibility of subtractionless first-pass single contrast medium dose lower extremity MRA. Moreover, both objective and subjective image quality are better than with subtraction MRA. • MRA is increasingly used for vascular applications. • Dixon imaging offers an alternative to image subtraction for fat suppression. • Subtractionless first-pass peripheral MRA is possible using two-point Dixon fat suppression. • Subtractionless peripheral MRA is possible at 1.5 T a single contrast medium dose. • Subtractionless first-pass peripheral MRA provides good image quality with few non-diagnostic studies.

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European Radiology

Tập 23

2228-2235

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