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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: J Magn Reson Imaging. 2019 Mar 12;51(1):25–42. doi: 10.1002/jmri.26716

Figure 1.

Figure 1.

Illustrations (a, b, and c; all by XXX and XXX) of current quantitative ultrasound-based elastography methods (not drawn to scale). Vibration-controlled transient elastography (VCTE, a) uses a probe to transmit mechanical vibrations through the skin surface and body wall (back and forth blue arrows). Point shear wave elastography (pSWE, b) and two-dimensional shear wave elastography (2D SWE, c) use a probe to generate acoustic radiation force impulse (ARFI) within the liver (blue dots). The wavy blue arrows indicate the induced shear waves and their direction. The rectangles outlined in white (a and b) indicate the interrogated cylindrical volume and the user-defined region of interest (ROI); the green-colored trapezoid and the white circle within (c) indicate the elastogram and the user-defined ROI, respectively.