Ultrasound shear wave speed measurements correlate with liver fibrosis in children.

Abstract:

BACKGROUND:Little published research has shown the relationship between noninvasive US shear wave speed (SWS) measurements and degree of liver fibrosis as established by percutaneous biopsy in children. OBJECTIVE:To assess the relationship between liver US shear wave speed (SWS) measurements and parenchymal fibrosis in children. MATERIALS AND METHODS:Sixty-two children (0-18 years old) with known or suspected liver disease underwent same-day US shear wave elastography (SWE) and clinically ordered percutaneous core needle biopsy. SWE was performed just before the liver biopsy in the area targeted for sampling, using an Acuson S3000 US system with a 9L4 transducer; six SWS measurements were acquired using Virtual Touch Quantification (VTQ) and Virtual Touch IQ (VTIQ) modes. Biopsy specimens were scored for histological fibrosis and inflammation. Bivariate relationships were assessed using Pearson correlation, while multiple linear regression analysis was used to establish the relationship between SWS and predictor variables. Receiver operating characteristic (ROC) curves were created to assess the abilities of VTQ and VTIQ to discern low vs. high liver fibrosis (histological fibrosis scores 0-2 vs. 3-6). RESULTS:There were significant positive correlations between liver histological fibrosis score and VTQ (n = 49) and VTIQ (n = 48) mean shear wave speed measurements (r = 0.68 and r = 0.73; P-values <0.0001). There also were significant positive correlations between liver histological inflammation score and VTQ and VTIQ mean shear wave speed measurements (r = 0.47 and r = 0.44, and P = 0.0006 and P = 0.0016, respectively). For VTQ, both histological fibrosis (P < 0.0001) and inflammation (P = 0.04) scores were significant predictors of shear wave speed (model adjusted R (2) = 0.49). For VTIQ, only histological fibrosis score (P < 0.0001) was a significant predictor of shear wave speed (model adjusted R (2) = 0.56). ROC areas under the curve were 0.84 and 0.86 for VTQ and VTIQ, respectively. CONCLUSION:Liver US shear wave speed measurements increase with increasing parenchymal fibrosis in children.

journal_name

Pediatr Radiol

journal_title

Pediatric radiology

authors

Dillman JR,Heider A,Bilhartz JL,Smith EA,Keshavarzi N,Rubin JM,Lopez MJ

doi

10.1007/s00247-015-3345-5

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

1480-8

issue

10

eissn

0301-0449

issn

1432-1998

journal_volume

45

pub_type

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