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. Author manuscript; available in PMC: 2014 Sep 4.
Published in final edited form as: Magn Reson Med. 2014 Feb;71(2):797–806. doi: 10.1002/mrm.24695

Figure 4. Sonication Types.

Figure 4

Three types of HIFU phantom sonication experiments were performed. The first was a purely stationary sonication (left), with no phantom motion and no HIFU focal steering. The second experiment (middle) involved the phantom moving back and forth, as described in Figure 3. However, in this case the HIFU focus remains fixed in space, and thus not at a constant position in the phantom. The final experiment (right) similarly involved the phantom moving back and forth, but additionally with the system tracking this motion and steering the HIFU focus accordingly to maintain a fixed position in the phantom.