Optimized approach to cine MRI of uterine peristalsis

Shanshan Liu, Qi Zhang, Chengying Yin, Song Liu, Queenie Chan, Weibo Chen, Jian He, Bin Zhu
Journal of magnetic resonance imaging : JMRI · 2016 · vol. 44(6) , pp. 1397–1404 · doi:10.1002/jmri.25303 · PMID:27192040 · W2403941734
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This study optimized uterine peristalsis cine MRI at 3.0T by finding that 5-7 mm slice thickness, 3-minute scan time, and 12-15x playback rate yield optimal image quality and peristalsis observation.

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Abstract

PURPOSE: To determine the optimal slice thickness, playback rate, and scan time for uterine peristalsis with 3.0T magnetic resonance imaging (MRI). MATERIALS AND METHODS: In all, 23 young female volunteers underwent a 3.0T MRI scan with different slice thicknesses of 3 mm (Cine3mm ), 5 mm (Cine5mm ), and 7 mm (Cine7mm ) for 6 minutes. Subjective image quality score, signal-to-noise ratios (SNRs), and contrast-to-noise ratios (CNRs) of those MR images were evaluated by two radiologists independently. The number, intensity, and direction of uterine peristalsis with different thickness were compared at various playback rates. Also, the peristalsis frequency was counted and compared in different acquisition durations (1-6 minutes). RESULTS: The subjective image quality score, peristalsis number, and intensity were significantly higher in Cine7mm and Cine5mm than Cine3mm (P < 0.05), while the SNRs and CNRs of Cine7mm were significantly higher than Cine3mm (P < 0.05). Peristalsis numbers did not differ significantly at different playback rates with the same slice thickness (P = 0.548-0.962). However, peristalsis intensity at 12×, and 15× was significantly greater than that at 8× the actual speed for Cine7mm and Cine5mm (P < 0.05). The peristalsis frequency at 3, 4, 5, 6 minutes was significantly higher than that at 1 minute and 2 minutes (P < 0.05). CONCLUSION: We recommend a slice thickness of 5 mm or 7 mm and a scan time of 3 minutes for uterine peristalsis with 3.0T MRI, and a playback rate of 12× or 15× the actual speed for peristalsis observation. J. Magn. Reson. Imaging 2016;44:1397-1404.

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MeSH descriptors

Image Interpretation, Computer-Assisted Magnetic Resonance Imaging, Cine Peristalsis Uterine Contraction Uterus Uterus Adult Female Humans Image Enhancement Image Enhancement Image Interpretation, Computer-Assisted Magnetic Resonance Imaging, Cine Menstrual Cycle Menstrual Cycle Observer Variation Peristalsis Reproducibility of Results Sensitivity and Specificity Signal-To-Noise Ratio

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