Tetsuo
Ogino1, Tomohiko Horie2, Isao Muro2, Marc
Van Cauteren3, taro takahara4
1Clinical
Science , Philips Electronics Japan, LTD, Minato-ku, Tokyo, Japan; 2Tokai
Univ. Hospital, Japan; 3Philips Healthcare Asia Pacific,
minato-ku, Tokyo, Japan; 4Division of Radiology, Radiotherapy and
Nuclear Medicine (RRN), University Medical Center (UMC) Utrecht, Utrecht,
Netherlands
Respiratory
and Cardiac motion affects DWI IQ on liver. A voxel deformation due to motion
under Motion Probing Gradient(MPG) induces spin phase dispersion in a voxel
and results signal loss. By replacing conventional MPG with a pair of bipolar
gradient, the signal loss is reduced significantly. However, minimum TE and
TR are prolonged due to low efficiency of such type of MPG. We propose a
novel MPG method which is formed as hybrid of conventional MPG and bipolar
MPG. Image quality of liver diffusion is significantly improved with slight
scan time prolongation from conventional respiratory triggered DWI.
Keywords