Ryan Keith Robison1, Kenneth Otho Johnson1, James Grant Pipe1
Spiral Projection Imaging (SPI) allows for intrinsic estimation of rigid-body patient motion through the comparison of data between spiral planes that correspond to different time points but similar k-space locations. The in-plane estimation scheme produces 2D estimates of motion for each spiral plane. Full 3D motion estimates can be obtained for each plane by combining the 2D estimates of spatially orthogonal, sequential triplets of spiral planes. In-vivo images and quantitative estimation results are presented for simulated and in-vivo motion affected data.