Addition of Reliability Measurement Index to Point Shear Wave Elastography: Prospective Validation via Diagnostic Performance and Reproducibility

Hyo Jin Kang, Jae Young Lee, Kyung Boon Lee, Ijin Joo, Kyung Suk Suh, Hyoung Ki Lee, Joon Koo Han

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The clinical value of the reliability measurement index (RMI), newly added to point shear wave elastography (pSWE), was investigated. Forty-nine patients underwent both pSWE providing RMI (range: 0.0–1.0) and transient elastography (TE) before hepatic surgery. Interclass correlation coefficients (ICCs) between the median of the first two to nine measurements (as categorized by RMI values ≥0.0 (liver stiffness-reliability measurement index [LS-RMI] 0.0), ≥0.4 (LS-RMI 0.4) and ≥0.7 (LS-RMI 0.7) and the median of 10 consecutive measurements (LS-REF) were obtained. Compared with LS-REF, minimums of 7 LS-RMI 0.0, 5 LS-RMI 0.4 and 3 LS-RMI 0.7 measurements were required to obtain an ICC ≥0.95 with high inter-observer agreement (ICC ≥0.90). Diagnostic performance did not differ (p values >0.05) using these reduced numbers of LS measurements. Significant correlations were found between the reduced number of LS measurements and TE or METAVIR (p values <0.001). Therefore, RMI helped to improve reliability and reduce the number of LS measurements while maintaining the diagnostic performance of pSWE.

Original languageEnglish
Pages (from-to)1594-1602
Number of pages9
JournalUltrasound in Medicine and Biology
Volume45
Issue number7
DOIs
StatePublished - Jul 2019

Keywords

  • Elastography
  • Liver fibrosis
  • Point shear wave elastography
  • Reliability measurement index
  • Ultrasonography

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