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.