High Resolution Phase Gradient Mapping as a Tool for the Detection and Analysis of Local Field Disturbances

Hendrik de Leeuw¹, Peter Roland Seevinck¹, Gerrit Hendrik van de Maat¹, Chris J.G. Bakker¹

We have demonstrated a post processing technique -phase gradient mapping- that enables us to generate positive contrast of magnetically labeled substances. It furthermore can be used as a tool for the detection and analysis of local field inhomogeneities. The technique can be applied without loss of resolution, does not need phase unwrapping and allows simple error estimations. Phase gradient mapping provides quantitative values and may be expected to find application in many areas, e.g., in studies concerned with the quantification or characterization of field distortions due to contrast agents