Susceptibility Mapping of the Sinuses in the Brain by Preserving Phase Information in the Skull Using Short Echo Times

Sagar Buch¹, Saifeng Liu¹, Yu-Chung Norman Cheng², Ewart Mark Haacke¹, ²

Susceptibility mapping is generally used to provide us with the distribution of magnetic susceptibility properties of the different tissues. This abstract introduces a new concept of mapping the susceptibility inside brain sinuses, which are usually discarded from the MR phase. One of our key advances is to include the tissues in the skull outside the sinuses in phase images, before applying the inverse filter. Because the susceptibility effects between air and tissue are so large, we are able to use short effective echo times, produced by complex division of the datasets at two different echo times, to extract the susceptibility.