Combination of Compressed Sensing and Parallel Imaging for Highly Accelerated Cardiac Cine MRI

• Main Authors: Ching-LungCheng, 鄭景隆
• Other Authors: Tzu-Cheng Chao
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/19763058395247856553

碩士 === 國立成功大學 === 醫學資訊研究所 === 103 === Cardiac CINE MRI has been extensively used in clinical exams and it typically requires patient’s breath-hold and ECG gating. Breath-hold could be a burden for patient so it is important to reduce the scan time for cardiac CINE imaging. Accelerated scan can reduce the duration of patient’s breath-hold, achieve the higher temporal resolution with the same scan time, or get the higher spatial resolution by increasing the matrix size. Numerous techniques have been proposed for accelerating the scan, such as parallel imaging and compressed sensing. Our study proposed a new method called k-t CS-SENSE. It sequentially combines the parallel imaging and compressed sensing to reconstruct highly undersampled data with higher temporal resolution and spatial resolution for cardiac CINE imaging. The proposed strategy uses the k-t FOCUSS for the initial compressed sensing reconstruction, and then the result is used in the later parallel imaging reconstruction to serve as reference information for parallel imaging reconstruction. Subsequently we use SENSE-based algorithm to perform parallel imaging reconstruction associated with additional regularization information to improve image reconstruction quality. For the simulation experiment with data acquired on a 3.0T scanner, k-t CS-SENSE could achieve 6-fold acceleration rate and having the reconstruction result with less noise and without too much reduction of temporal resolution.