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Diagnostic ultrasound ( PDFDrive )

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CHAPTER 51 The Pediatric Liver and Spleen 1765

A

B

FIG. 51.34 Chronic Liver Disease Due to Hepatitis B. (A) Shear wave elastography color map and circular region of interest placed over

a relatively homogenous area of liver, yielding a shear wave velocity of 2 m/sec. (B) Propagation wave display shows vertical blue bands of the

shear wave front passing through the liver. Regular wave contours and intervals favor a homogenous site for measurements.

A

B

C

D

FIG. 51.35 Acoustic Radiation Force Imaging (ARFI). (A) Shear wave region of interest is selected perpendicular to the liver capsule and

more than 1 cm deep to the liver margin. (B) Color display of elastography to aid in selecting an appropriate site. (C) Larger box in which multiple

shear wave measurements have been made. (D) Table of results to look for erroneous data and spurious results, average values, standard deviation,

and interquartile range (IQR).

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