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Abstract #1331

T2-Weighted Fourier Velocity Encoding: MR Oximetry in Small Vessels

Christopher Marek Wernik1, Venkat Ramanan2, Graham A. Wright1,2, Christopher K. Macgowan1,3

1Dept. of Medical Biophysics, University of Toronto, Toronto, ON, Canada; 2Imaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; 3Dept. of Diagnostic Imaging, Hospital for Sick Children, Toronto, ON, Canada

MR oximetry based on quantitative T2 measurement is a noninvasive technique for measuring blood oxygen saturation. However, partial volume effects limit T2 accuracy in narrow vessels or impose long scan times at reduced SNR. In this study, we propose an improved technique which uses Fourier velocity encoding to control for partial volume effects and test its feasibility using an apparatus that mimics constant blood flow in a vessel. The results show that the proposed technique is more accurate than conventional MR oximetry in the presence of partial volume effects. Considerations for in vivo application are discussed.