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. Author manuscript; available in PMC: 2011 Feb 1.
Published in final edited form as: Magn Reson Med. 2010 Feb;63(2):407–418. doi: 10.1002/mrm.22219

Figure 3.

Figure 3

Prior knowledge about the imaged object can often be expressed in the form of a region of support in x-y-f space, where non-aliased signal is expected/allowed. A few examples are given here, for a few different dynamic imaging methods. A cube encompassing the whole FOV along x and y and bandwidth along f would represents full support, i.e., no assumption. The (x,y) locations provided with a wide bandwidth along f may contain very dynamic material, such as a beating heart, while locations provided with a narrow bandwidth can accommodate only nearly-static materials. A discontinuous support along f is appropriate in applications where the expected signal is periodic in time, giving rise to harmonics along f. When combined with parallel imaging, a nearly-full volume can be supported (about 90% of the f axis). In k-t SENSE, the prior knowledge can take instead the form of a low-resolution image.