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Abstract #2789

Comparison of Two Different Implementations for the Simultaneous Non-Contrast Angiography and Intraplaque Hemorrhage (SNAP) Sequence

M Louis Lauzon1,2, Niranjan Balu3, Chun Yuan3, and Richard Frayne1,2

1Radiology and Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada, 2Seaman Family MR Research Centre, Foothills Medical Centre, Calgary, AB, Canada, 3Radiology, University of Washington, Seattle, WA, United States

We compare, using Bloch equation simulation, the relative signal in intraplaque hemorrhage (IPH), arterial wall (Wall) and Lumen (i.e., blood), along with the IPH–Wall contrast for two different implementations of the SNAP sequence. The first implementation is the original version (Ver1) that uses a linear phase-encoding scheme post-IR, whereas the second version (Ver2) uses centric slice-encodes post-IR. We show that, although Ver2 appears to be less time-efficient, it actually provides increased signal and contrast for the same acquisition time.

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