Feasibility of free-breathing dynamic contrast-enhanced MRI of the abdomen: a comparison between CAIPIRINHAVIBE, Radial-VIBE with KWIC reconstruction and conventional VIBE

作者：Seo Nieun; Park Seong J; Kim Bohyun; Lee Chang K; Huh Jimi; Kim Jeong K; Lee Seung S; Kim In S; Nickel Dominik; Kim Kyung W^*

来源：British Journal of Radiology, 2016, 89(1066): 20160150.

DOI：10.1259/bjr.20160150

Objective: To evaluate the feasibilities of controlled aliasing in parallel imaging results in higher acceleration with volumetric interpolated breath-hold examination (CAIPIRINHA-VIBE), radial acquisition of VIBE (Radial-VIBE) with k-space-weighted image contrast (KWIC) reconstruction (KWIC-Radial-VIBE) and conventionalVIBE (c-VIBE) for free-breathing dynamic contrastenhanced (DCE)-MRI of the abdomen.
Methods: 23 prospectively enrolled patients underwent DCE-MRI of the abdomen with CAIPIRINHA-VIBE (n=10), KWIC-Radial-VIBE (n=6) or c-VIBE (n=7). Qualitative image quality of the DCE-MR images and perfusion maps was independently scored by two abdominal radiologists using a 5-point scale (from 1, uninterpretable, to 5, very good). For quantitative analysis, the signal-to-noise ratio (SNR) of the liver and goodness-of-fit (GOF) of the time-intensity curve were measured.
Results: In the three tested sequences, DCE-MRI had good temporal (5s) and spatial resolution (1.4831.4834mm/ voxel). Interobserver agreement in the qualitative analysis was good (kappa =0.753; 95% confidence interval, 0.610-0.895). Therefore, the mean scores were used in the data analysis. Overall image quality was comparable between CAIPIRINHA-VIBE (3.52 +/- 0.55) and KWIC-Radial- VIBE (3.72 +/- 0.37; p51.000), and both were significantly better than c-VIBE (2.71 +/- 0.34; p<0.001). Perfusion map quality score was highest with KWICRadial- VIBE (4.33 +/- 0.65), followed by CAIPIRINHA-VIBE (3.70 +/- 0.73) and c-VIBE (3.14 +/- 0.66), but without statistical significance between CAIPIRINHA-VIBE and KWIC-RadialVIBE (p=0.167). The SNR of the liver and GOF of the time-intensity curve did not significantly differ between the three sequences (p=0.116 and 0.224, respectively).
Conclusion: CAIPIRINHA-VIBE and KWIC-Radial-VIBE provide comparably better performance than c-VIBE. Both can be feasible sequences with acceptable good image quality for free-breathing DCE-MRI.
Advances in knowledge: CAIPIRINHA-VIBE and KWIC-Radial- VIBE provide comparably better quality of freebreathing DCE-MRIs than c-VIBE.

• 出版日期2016