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.