Parallel imaging performance investigation of an 8-channel common-mode differential-mode (CMDM) planar array for 7T MRI

Quantitative Imaging in Medicine and Surgery

Xiao Chen²  Ye Li²  Xiaoliang Zhang¹  Xiaoqing Hu²  Xin Liu²  Hairong Zheng² 

[1] Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA,USA;UCSF/UC Berkeley Joint Graduate Group in Bioengineering, San Francisco, CA,USA;Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology of Chinese Academy of Sciences, Shenzhen 518055,China;Shenzhen Key Laboratory for MRI, Shenzhen 518055,China

关键词: Magnetic resonance image (MRI);    parallel MRI;    multichannel phased array;    common-mode differential-mode (CMDM);    signal-to-noise ratio (SNR);   

DOI  :  10.3978/j.issn.2223-4292.2014.02.05

学科分类：外科医学

来源: AME Publications

【 摘 要 】

An 8-channel planar phased array was proposed based on the common-mode differential-mode (CMDM) structure for ultrahigh field MRI. The parallel imaging performance of the 8-channel CMDM planar array was numerically investigated based on electromagnetic simulations and Cartesian sensitivity encoding (SENSE) reconstruction. The signal-to-noise ratio (SNR) of multichannel images combined using root-sum-of-squares (rSoS) and covariance weighted root-sum-of-squares (Cov-rSoS) at various reduction factors were compared between 8-channel CMDM array and 4-channel CM and DM array. The results of the study indicated the 8-channel CMDM array excelled the 4-channel CM and DM in SNR. The g-factor maps and artifact power were calculated to evaluate parallel imaging performance of the proposed 8-channel CMDM array. The artifact power of 8-channel CMDM array was reduced dramatically compared with the 4-channel CM and DM arrays demonstrating the parallel imaging feasibility of the CMDM array.

【 授权许可】

Unknown