The ornamental design for an apparatus for quantifying stiffness and ultrasound attenuation of the liver, as shown and described.
FIG. 1 is a perspective view of an apparatus for quantifying stiffness and ultrasound attenuation of the liver showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines illustrate portions of the apparatus for quantifying stiffness and ultrasound attenuation of the liver that form no part of the claimed design.