Zhilang Qiu1,2, Sen Jia1, Haifeng Wang1, Lei Zhang1, Xin Liu1, Hairong Zheng1, and Dong Liang1
1Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China, 2University of Chinese Academy of Sciences, Beijing, China
1Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China, 2University of Chinese Academy of Sciences, Beijing, China
This
work proposes to extend the existing reconstruction methods, ESPIRiT and SPIRiT
(named r2f-ESPIRiT and r2f-SPIRiT, respectively) to reconstruct artifact-free
images in wave encoded reduced FOV imaging scenario, with full FOV images additionally
obtained without adding scan time.
Figure
1. Diagram of the proposed r2f-ESPIRiT reconstruction for reduced FOV parallel imaging
with wave encoded k-space trajectory. Although accelerated reduced FOV imaging scan
is performed, the full FOV image can be reconstructed.
Figure
5. Wave encoded 3D imaging with 1 (PE) × 2 (PAR) acceleration. In the conventional
ESPIRiT reconstruction, 2 sets of maps were estimated from a reduced FOV ACS
scan (a), and residual aliasing artifacts (yellow arrows) remain in the
reconstructed image of RO-PAR plane (c). In the proposed r2f-ESPIRiT, an ACS
scan with 40% slice-oversampling was used to estimate the sensitivity maps (b),
but it does not add additional scan time, and an artifact-free and full FOV
image can be obtained (d).