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- Title
Non-contrast renal MRA using multi-shot gradient echo EPI at 3-T MRI.
- Authors
Morita, Kosuke; Nakaura, Takeshi; Yoneyama, Masami; Nagayama, Yasunori; Kidoh, Masafumi; Uetani, Hiroyuki; Ikeda, Osamu; Yamashita, Yasuyuki; Hirai, Toshinori
- Abstract
Objectives: The purpose of this study was to investigate the feasibility of non-contrast renal MRA using multi-shot gradient echo planar imaging (MSG-EPI) with a 3-T MRI system. Methods: Seventeen healthy volunteers underwent non-contrast renal MRA using MSG-EPI and balanced steady-state free precession (b-SSFP) sequences on a 3-T MRI system. Two radiologists independently recorded the images' contrast, noise, sharpness, artifacts, and overall quality on 4-point scales. The signal-to-noise ratio (SNR) for the renal artery, the contrast ratio (CR) between the renal artery and erector spinae, and acquisition time were compared between the two sequences. Results: The SNR and CR were significantly higher with MSG-EPI than with the b-SSFP sequence (17.80 ± 3.67 vs. 10.84 ± 2.86 and 0.77 ± 0.05 and 0.66 ± 0.09, respectively; p < 0.05), and the acquisition time was significantly lower (164.5 ± 34.0 vs. 261.5 ± 39.3 s, respectively; p < 0.05). There were significant differences in image contrast, noise, sharpness, artifacts, and overall image quality between the two sequences (p < 0.01). Conclusions: The MSG-EPI sequence is a promising technique that can shorten the scan time and improve the image quality of non-contrast renal MRA with a 3-T MRI system. Key Points: • The multi-shot gradient echo planar imaging with an inversion pulse is a brand-new fast scan technique for an unenhanced renal MRA. • The image quality of multi-shot gradient echo planar imaging is better than that of b-SSFP for an unenhanced renal MRA.
- Subjects
MAGNETIC resonance imaging; RENAL artery; ERECTOR spinae muscles; SIGNAL-to-noise ratio
- Publication
European Radiology, 2021, Vol 31, Issue 8, p5959
- ISSN
0938-7994
- Publication type
Article
- DOI
10.1007/s00330-020-07653-4