Techniques for speckle tracking: block matching
The clinical need for in vivo motion and deformation quantification and the many applications have been clearly explained in the previous chapters. In general, we distinguish between (1) quasi-static elastography: speckle tracking during compression or palpation of tissue to estimate local strains and elasticity and (2) dynamic elastography, where speckle tracking on actively deforming tissue such as the heart, arteries and skeletal muscles is performed. The third class, where motion of the tissue is induced with a vibrational device or a push by the transducer (ARFI, shear wave imaging) is not dealt with in this chapter. We will elaborate on a sub-set of speckle tracking and/or strain imaging techniques, which are based on the so-called block-matching techniques. Hence, Doppler-based techniques will not be discussed.
Techniques for speckle tracking: block matching, Page 1 of 2
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