title: Automatic assessment of shear wave elastography quality and measurement reliability in the liver.
abstract: A strategy is proposed that accesses the quality of individual shear wave elastography (SWE) exams and the reliability of elasticity measurements in clinical practice. For that purpose, a confidence index based on temporal stability and SWE filling was defined to provide an automatic estimation of each scan quality: high (HG) or low (LG) grade. With this index, the intra-observer acquisition variability assessed by comparing consecutive scans of the same patient was 17% and 32% for HG and LG clips, respectively. The measurement quantification variability assessed by comparing the measurements of a radiologist with those of a trained operator and of two automatic measurements on a same clip averaged 13% and 22% for HG and LG exams, respectively. It was found that SWE measurements depend greatly on the quality of the acquired data. The proposed quality index (HG or LG) provides objective input on the accuracy and diagnostic reliability of SWE measurements.
authors.affiliation: Laboratoire d'Imagerie Biomédicale, Université Pierre et Marie Curie, Sorbonne Universités, CNRS, INSERM, Paris, France. Electronic address: Claire.barakat@inserm.fr.
authors.forename: Claire
authors.initials: C
authors.lastname: Pellot-Barakat
authors.affiliation: Laboratoire d'Imagerie Biomédicale, Université Pierre et Marie Curie, Sorbonne Universités, CNRS, INSERM, Paris, France.
authors.forename: Muriel
authors.initials: M
authors.lastname: Lefort
authors.affiliation: Radiology Department, Hôpital Pitié-Salpêtrière, APHP, Paris, France.
authors.forename: Linda
authors.initials: L
authors.lastname: Chami
authors.affiliation: Laboratoire d'Imagerie Biomédicale, Université Pierre et Marie Curie, Sorbonne Universités, CNRS, INSERM, Paris, France.
authors.forename: Mickaël
authors.initials: M
authors.lastname: Labit
authors.affiliation: Laboratoire d'Imagerie Biomédicale, Université Pierre et Marie Curie, Sorbonne Universités, CNRS, INSERM, Paris, France.
authors.forename: Frédérique
authors.initials: F
authors.lastname: Frouin
authors.affiliation: Laboratoire d'Imagerie Biomédicale, Université Pierre et Marie Curie, Sorbonne Universités, CNRS, INSERM, Paris, France; Radiology Department, Hôpital Pitié-Salpêtrière, APHP, Paris, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Lucidarme
mesh_terms: D054459:Elasticity Imaging Techniques / Q000379:methods*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008099:Liver / Q000000981:diagnostic imaging*; D008103:Liver Cirrhosis / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
keywords: Elasticity imaging; Liver fibrosis; Observer variability; Quality criteria; Reliability; Reproducibility; Shear wave elastography