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Abstract #2494

Further Acceleration of Partial Fourier-FOCUSS Using Bunched Phase Encoding

Hisamoto Moriguchi1, Kohki Yoshikawa2, Morio Shimada2, Shin-ichi Urayama3, Yutaka Imai1, Manabu Honda4, Takashi Hanakawa4

1Radiology, Tokai University, Isehara, Kanagawa, Japan; 2Radiological Sciences, Komazawa University, Tokyo, Japan; 3Human Brain Research Center, Kyoto University, Kyoto, Japan; 4Functional Brain Research, National Center of Neurology and Psychiatry, Tokyo, Japan

Bunched Phase Encoding (BPE) has significant potential for fast data acquisition in MRI. In BPE, k-space data are acquired along zigzag trajectories to reduce the scan time. Partial Fourier-FOCUSS (PF-FOCUSS) has been proposed as a new reconstruction method for PF imaging in standard Cartesian data acquisition. Images reconstructed using PF-FOCUSS are generally of high quality. In this study, BPE acquisition method is taken advantage of in PF-FOCUSS to further accelerate data acquisition while quality of the image is maintained. The newly proposed method is referred to as eBPE-PF-FOCUSSf. BPE-PF-FOCUSS can usually achieve reduction factor 4 with no significant noise amplification.