Abstract #0374

Difference Image Ultra-Short Echo Time T2* Mapping Using a 3D Cones Trajectory

Amin Nazaran^1,2, Grayson Tarbox³, Randy Hartley⁴, and Neal Bangerter^4,5

¹Electrical Engineering, Brigham Young University, Provo, UT, United States, ²University of California San Diego, San Diego, CA, United States, ³Brigham Young University, Provo, UT, United States, ⁴Electrical Engineering, Brigham Young University, ⁵Radiology, University of Utah

This study introduces a methodology for detecting subtle variations in tissues with very rapid T2* decay through a difference image ultra-short T2* mapping technique using a 3D cones k-space trajectory. The new method is demonstrated in both a normal and surgically repaired Achilles tendon. The resulting UTE images were differenced and T2* values were calculated using a mono-exponential least squares fit on a voxel by voxel basis. The ultrashort T2* maps yield very consistent short T2* values in healthy tendon of 0.3 – 0.5 ms, while notable variations and elevations of T2* values are observed in the surgically repaired tendon.

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