Abstract #1836

Hsieh C, Cheng Y, Neelavalli J, Haacke E, Liu Q

We have studied the simulation and experiment of a small air tube in a gel phantom. The susceptibility difference between the gel and air creates a phase variation in the gel. Based on analyzing MR signals within two specific concentric circles on each complex image, the susceptibilities obtained from different complex images can be accurate within 10%. This complex sum method is promising to be used in quantifying local susceptibilities of small objects. Efforts in this research will lead to the quantification of small amount of iron in vivo in future.