Application of Synthetic Aperture Imaging to Non-Invasive Vascular Elastography
نویسندگان
چکیده
Elastography imaging is performed by subjecting the tissue under investigation to a form of mechanical excitation. The resultant tissue displacement vector is measured and can be used compute the spatial variation of strain within the tissue. These strain maps, known as elastograms, serve as surrogates for tissue elasticity. While elastography can be performed with any imaging modality, ultrasound is portable and inexpensive, and provides images at high frame rates, making it ideal for realtime applications. However, ultrasound based elastography has limitations that have hampered its widespread clinical utility. Specifically, ultrasound can accurately measure the component of displacement only in the axial direction.
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