Accelerated 3D bSSFP Using a Modified Wave-CAIPI Technique With Truncated Wave Gradients

作者：Shi Su, Zhilang Qiu, Chao Luo, Caiyun Shi, Liwen Wan, Yanjie Zhu, Ye Li, Xin Liu, Hairong Zheng, Dong Liang, Haifeng Wang · 发表于：IEEE Transactions on Medical Imaging · 年份：2020 · DOI：10.1109/tmi.2020.3021737 · 被引用次数：11 · 研究领域：Advanced MRI Techniques and Applications、Sparse and Compressive Sensing Techniques、Electron Spin Resonance Studies

The Wave Controlled Aliasing In Parallel Imaging (Wave-CAIPI) technique manifests great potential to highly accelerate three-dimensional (3D) balanced steady-state free precession (bSSFP) through substantially reducing the geometric factor (g-factor) and aliasing artifacts of image reconstruction. However, severe banding artifacts appear in bSSFP imaging due to unbalanced gradients with nonzero 0thmoment applied by the conventional Wave-CAIPI technique. In this study, we propose a 3D Wave-bSSFP scheme that adopts truncated wave gradients with zero 0thmoment to avoid introducing additional banding artifacts and to maintain the advantages of wave encoding. The simulation results indicate that the number of wave cycles that are truncated and different options of applying wave gradients affect both the g-factor reduction and image quality, but the influence is limited. In phantom experiments, the proposed technique shows similar acceleration performance as the conventional Wave-CAIPI technique and effectively eliminates its introduced banding artifacts. Additionally, Wave-bSSFP obtains up to $12\times $ retrospective acceleration at 0.8 mm isotropic resolution in in vivo 3D brain experiments and is superior to the state-of-the-art Controlled Aliasing In Parallel Imaging Results IN Higher Acceleration (CAIPIRINHA) technique, according to both visual validation and quantitative analysis. Moreover, in vivo 3D spine and abdomen imaging demonstrate the potential clinical applications ...