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. Author manuscript; available in PMC: 2010 Aug 13.
Published in final edited form as: Magn Reson Med. 2010 Mar;63(3):736–744. doi: 10.1002/mrm.22227

Figure 4.

Figure 4

Blood artifact (arrowhead) at the popliteal wall-lumen border in the DIR-FSE images (top row). While this artifact is not obvious with effective TE of 9.4 ms, it is conspicuous in images acquired at longer effective TEs where wall components and surrounding muscles with short T2s have decayed. The DIR-FSE T2 map shows elevated T2 values along the wall-lumen interface, indicating the presence of blood signal. These artifacts are absent in the T2IR-FSE images and corresponding T2 map (bottom row).