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Abstract #1383

Mapping of T2 and ADC in Articular Cartilage with B1 Corrected DESS

Bragi Sveinsson1, 2, Ernesto Staroswiecki1, 2, Kristin Granlund1, 2, Garry E. Gold1, Brian A. Hargreaves1

1Radiology, Stanford University, Stanford, CA, United States; 2Electrical Engineering, Stanford University, Stanford, CA, United States

Double Echo in Steady State is a 3D steady state method that has been demonstrated to provide accurate measurements of ADC in articular cartilage in short scan times with high SNR and low distortion. One approach estimates T1 and T2 as well as the ADC. Another approach eliminates dependency on T1 and T2 to estimate ADC more quickly. Both approaches suffer from sensitivity to B1 deviations when estimating ADC. We demonstrate a method to reduce errors caused B1 deviations. The method is tested in phantoms and in vivo with positive results.