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High-resolution MR-imaging of the liver with T2-weighted sequences using integrated parallel imaging: Comparison of prospective motion correction and respiratory triggering

✍ Scribed by Christoph J. Zech; Karin A. Herrmann; Armin Huber; Olaf Dietrich; Alto Stemmer; Peter Herzog; Maximilian F. Reiser; Stefan O. Schoenberg

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
533 KB
Volume
20
Category
Article
ISSN
1053-1807

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✦ Synopsis

Abstract

Purpose

To compare high‐resolution T2‐weigthed images of the liver with and without integrated parallel acquisition techniques (iPAT) using either breath‐hold sequences in combination with prospective acquisition motion correction (PACE) or respiratory triggering.

Materials and Methods

Ten volunteers and 10 patients underwent each four different high‐resolution fast spin echo (FSE) T2‐weigthed sequences with 5 mm slice thickness and a full 320 matrix: a multi‐breath‐hold FSE sequence with and without iPAT and PACE and a respiratory‐triggered FSE sequence with and without iPAT. Image quality was rated with a five‐point scale by two independent readers. Signal intensity measurements were performed on a water phantom.

Results

The sequences with iPAT required a substantially shorter acquisition time without loss of image quality. Overall image quality was rated equal for all sequences by both readers. Image time for nine slices with iPAT was 13 seconds (19 seconds without iPAT) with multi‐breath‐hold and on average 4:00 minutes (7:02 minutes without iPAT) with respiratory triggering. Imaging with the PACE technique resulted in more correct positioning of the image stacks.

Conclusion

T2‐weighted fast imaging with iPAT is feasible and results in high‐quality images within a short acquisition time. Overall image quality is not negatively affected by iPAT. J. Magn. Reson. Imaging 2004;20:443–450. © 2004 Wiley‐Liss, Inc.

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