Non-enhanced magnetic resonance imaging of the small bowel at 7 Tesla in comparison to 1.5 Tesla: First steps towards clinical application

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• 作者：Maria L. Hahnemann^a ; ^b ; ^c ; ¹ ; ^{maria.hahnemann@ukmuenster.de" class="auth_mail" title="E-mail the corresponding author} ; Oliver Kraff^c ; Stefan Maderwald^c ; Soeren Johst^c ; Stephan Orzada^c ; Lale Umutlu^b ; ^c ; Mark E. Ladd^c ; ^d ; Harald H. Quick^c ; ^e ; Thomas C. Lauenstein^b
• 关键词：Magnetic resonance imaging ; T2-weighted imaging ; Small bowel ; Ultra-high field MRI ; 7 tesla
• 刊名：Magnetic Resonance Imaging
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：34
• 期：5
• 页码：668-673
• 全文大小：704 K

文摘

To perform non-enhanced (NE) magnetic resonance imaging (MRI) of the small bowel at 7 Tesla (7 T) and to compare it with 1.5 Tesla (1.5 T).

Material and methods

Twelve healthy subjects were prospectively examined using a 1.5 T and 7 T MRI system. Coronal and axial true fast imaging with steady-state precession (TrueFISP) imaging and a coronal T2-weighted (T2w) half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequence were acquired. Image analysis was performed by 1) visual evaluation of tissue contrast and detail detectability, 2) measurement and calculation of contrast ratios and 3) assessment of artifacts.

Results

NE MRI of the small bowel at 7 T was technically feasible. In the vast majority of the cases, tissue contrast and image details were equivalent at both field strengths. At 7 T, two cases revealed better detail detectability in the TrueFISP, and better contrast in the HASTE. Susceptibility artifacts and B₁ inhomogeneities were significantly increased at 7 T.

Conclusion

This study provides first insights into NE ultra-high field MRI of the small bowel and may be considered an important step towards high quality T2w abdominal imaging at 7 T MRI.