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Application of Shear Wave Sonoelastography in the Differential Diagnosis of Extra- and Intra-Thyroidal Ectopic Thymic Tissue
Article

Interobserver Agreement and Plane-Dependent Intraobserver Variability of Shear Wave Sonoelastography in the Differential Diagnosis of Ectopic Thymus Tissue

1
Department of Endocrinology and Metabolic Diseases, Polish Mother’s Memorial Hospital Research Institute, 93-338 Lodz, Poland
2
Department of Endocrinology and Metabolic Diseases, Medical University of Lodz, 93-338 Lodz, Poland
3
Institute of Information Technology, Lodz University of Technology, 90-924 Lodz, Poland
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
J. Clin. Med. 2021, 10(2), 214; https://doi.org/10.3390/jcm10020214
Received: 29 October 2020 / Revised: 30 December 2020 / Accepted: 7 January 2021 / Published: 9 January 2021
(This article belongs to the Special Issue Novel Methods of Diagnostics of Thyroid and Parathyroid Lesions)
Shear wave elastography (SWE) has been demonstrated to be a useful tool in the differential diagnosis of ectopic thymus tissues (ETs), providing quantitative values of the shear wave stiffness (SWS) of both ETs and adjacent thyroid tissue. However, no data are available on the potential influence of the imaging plane (transverse vs. longitudinal) on the obtained SWS and shear wave ratio (SWR) values in SWE of these tissues. Moreover, no reports on the interobserver repeatability of SWE were published in regard to ETs. The aim of this study has been to evaluate the potential influence of the examination plane—transverse vs. longitudinal—on the SWS and SWR results, as well as to determine whether SWE of ETs is subjected to interobserver variability. SWE was demonstrated to have high inter- and intraobserver agreement in the evaluation of ETs and adjacent thyroid tissue. Significant differences between SWS values, but not SWR values, obtained in the transverse and longitudinal planes were observed. This phenomenon is probably a result of anisotropy-related artifacts and does not reduce the reliability of the method. SWE operators should be aware of the presence of plane-dependent artifacts to properly interpret the obtained results. View Full-Text
Keywords: shear wave elastography; ectopic thymus; thyroid; ultrasound; interobserver variability shear wave elastography; ectopic thymus; thyroid; ultrasound; interobserver variability
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MDPI and ACS Style

Adamczewski, Z.; Stasiak, M.; Stasiak, B.; Adamczewska, M.; Lewiński, A. Interobserver Agreement and Plane-Dependent Intraobserver Variability of Shear Wave Sonoelastography in the Differential Diagnosis of Ectopic Thymus Tissue. J. Clin. Med. 2021, 10, 214. https://doi.org/10.3390/jcm10020214

AMA Style

Adamczewski Z, Stasiak M, Stasiak B, Adamczewska M, Lewiński A. Interobserver Agreement and Plane-Dependent Intraobserver Variability of Shear Wave Sonoelastography in the Differential Diagnosis of Ectopic Thymus Tissue. Journal of Clinical Medicine. 2021; 10(2):214. https://doi.org/10.3390/jcm10020214

Chicago/Turabian Style

Adamczewski, Zbigniew, Magdalena Stasiak, Bartłomiej Stasiak, Magdalena Adamczewska, and Andrzej Lewiński. 2021. "Interobserver Agreement and Plane-Dependent Intraobserver Variability of Shear Wave Sonoelastography in the Differential Diagnosis of Ectopic Thymus Tissue" Journal of Clinical Medicine 10, no. 2: 214. https://doi.org/10.3390/jcm10020214

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