Reducing Artifacts in SWI Based MR Venography - Post Processing Technique to Compensate for the Signal Loss

Se Rim Park¹, Ung Jang¹, Dosik Hwang¹

IN SWI MR venography, long echo time might be desired for high contrast. However, longer echo time eventually introduces artifacts mainly caused because of unexpected macroscopic field inhomogeneity, especially around the orbito-frontal cortex. In order to correct the image, for the first step, local inhomogeneity is directly calculated after the signal acquisition, and Local Field Gradient (LFG) map is created. Then each signal is corrected to certain degree according to this LFG value so that the optimum image is restored.