Interobserver Agreement and Intraobserver Reproducibility in Thyroid Ultrasound Elastography

Lim, Dong Jun; Si, Luo; Kim, Min Hee; Ko, Sung‐Hwa; Kim, Yongmin

doi:10.2214/ajr.11.7009

Cited by 78 publications

(74 citation statements)

References 18 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, we tested the interobserver variability as well. We obtained good results, with a Cohen's k value of 0.755, which is consistent with the result of the study of Lim et al [22] (k = 0.77) and Merino et al [31] (k = 0.82) using different elastographic techniques.…”

Section: Discussionsupporting

confidence: 91%

“…On the other hand however, more recently Lim et al [22] obtained good interobserver and intraobserver agreement with in vivo compression elastography. Analyzing the state of the art of thyroid elastography, EFSUMB guidelines [23] (European Federation of Societies of Ultrasound in Medicine and Biology) conclude with the practical recommendations: ''Elastography is an additional tool for thyroid lesion differentiation.''…”

Section: Discussionmentioning

confidence: 95%

See 1 more Smart Citation

Prospective evaluation of acoustic radiation force impulse technology in the differentiation of thyroid nodules: accuracy and interobserver variability assessment

et al. 2014

View full text Add to dashboard Cite

Purpose The aim of this study is to assess the diagnostic efficacy and interobserver agreement of acoustic radiation force impulse (ARFI) elasticity imaging in differentiating thyroid nodules. Methods In our study, 74 consecutive patients (52 females, 22 males; age range 27-77 years, mean: 41 years) with 82 thyroid nodules (60 benign nodules, and 22 malignant) were examined by two radiologists with different experience. Patients underwent either cytology using fine needle aspiration cytology or thyroid surgery. The diagnostic performance of the two operators at ARFI with sensitivity, specificity, positive predictive and negative predictive value, and ROC curves was estimated. Interreader variability between the two operators was defined using Cohen's k.Results According to receiver operating characteristics ROC curves (AUROC = 0.86 for observer 1; 0.81 for observer 2) sensitivity, specificity, PPV and NPV of reader 1 and 2 were respectively: 90, 75, 90.91 and 96.55 %; (cutoff value of shear wave: 2.455 m/s); 90, 72, 90 and 96.90 % (cut-off value shear wave: 2.365 m/s). Concordance between the two operators was good (k = 0.755). Conclusions This work is a feasibility study evaluating ARFI imaging. Its results suggest that ARFI imaging is a reproducible method which can be utilized with good diagnostic performance in the thyroid for discriminating benign and malignant nodules using the cut-off value of 2.455 m/s. However, larger studies are needed to validate this method.Keywords Acoustic radiation force impulse (ARFI) Á Elastography Á Benign thyroid nodules Á Malignant thyroid nodules Á Ultrasound Riassunto Scopo Lo scopo di questo studio è la valutazione della efficacia diagnostica e della concordanza inter-osservatore dell'imaging elastografico ARFI, per la differenziazione di noduli tiroidei. Metodo Nel nostro studio, 74 pazienti consecutivi (52 femmine, 22 maschi; range di età 22-77 anni, età media 41 anni) con 82 noduli tiroidei (60 noduli benigni e 22 maligni), sono stati esaminati da due radiologi con diverso livello di esperienza. I pazienti sono stati sottoposti o a citologia aspirativa con ago sottile (FNAC), o a chirurgia tiroidea. La performance diagnostica dei due operatori all' ARFI è stata stimata con la sensibilità, la specificità, il valore predittivo positivo (VPP) e negativo (VPN), attraverso le curve ROC (receiver operating characteristics). La variabilità inter-osservatore tra i due operatori, è stata definita usando la kappa di Cohen. (2014( ) 17:13-20 DOI 10.1007 Risultati Secondo le curve ROC (AUROC = 0.86 per il primo osservatore; 0.81 per il secondo osservatore) la sensibilità, la specificità, il VPP e il VPN per gli osservatori 1 e 2, erano rispettivamente: 90, 75, 90,91, e 96.55 %; (valore medio di shear wave: 2.455 m/s); 90, 72, 90 e 96.90 % (valore medio di shear wave: 2.365 m/s). La concordanza tra I due operatori era buona (k = 0.755). Conclusioni Questo lavoro è uno studio preliminare che valuta l'imaging elastografico con Acustic Radiation Force Impulse. I risultati sug...

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 95%

Prospective evaluation of acoustic radiation force impulse technology in the differentiation of thyroid nodules: accuracy and interobserver variability assessment

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Pulsations from neighboring structures -carotid artery, in the case of thyroid USE -induce the displacement necessary to assess tissue elasticity. The information may be: a. qualitative -RTE b. semiquantitative -thyroid strain (or stiffness) index [13,14] and elasticity contrast index [15], as implemented by Samsung Medison. 1.2.…”

Section: Elastographic Techniquesmentioning

confidence: 99%

Ultrasound elastography in thyroid disease

Dudea

Botar-Jid

2015

Med Ultrason

View full text Add to dashboard Cite

Thyroid elastography has become, lately, one of the main focuses in thyroid imaging. With more than one hundred papers published on this subject, the core of accumulated knowledge justifies the need for a comprehensive review on the topic. The paper presents the various elastographic techniques used for thyroid assessment. Both strain and shear wave elastography, with all their variants, are discussed. Thereafter the paper proceeds to a detailed description of the technical peculiarities, diagnostic value, limitations and pitfalls for each technique. Although the main accent is placed on thyroid nodules, the applications of elastography in other thyroid disease, diffuse or focal, are also presented. The results of the available metaanalyses are reviewed and the proven value of the technique is highlighted. Still unanswered questions and directions for future research are emphasized, whenever appropriate.

show abstract

“…When dealing with quasistatic strain USE with elasticity contrast index (ECI), values above 3 were the most accurate values cut-off for predicting the malignant nature of the nodules [40], This technique showed excellent inter-observer agreement [18].…”

Section: Malignant Thyroid Nodulesmentioning

confidence: 97%

“…Different elastographic techniques were used by these authors and they found that all methods has both good sensitivity and specificity for predicting malignancy in thyroid nodules (fig 4) [12][13][14][15][16]. Also, inter-and intra-operator reproducibility of 'quasi-static' elastography is considered acceptable [17,18]. Thyroid nodules with VTQ values <2.16 m/s were all benign, which accounted for 60.2% of all benign nodules [19].…”

Section: Cysts and Pseudocystsmentioning

confidence: 99%

Thyroid Ultrasound: State of the Art. Part 2 – Focal Thyroid Lesions

et al. 2017

View full text Add to dashboard Cite

Accurate differentiation of focal thyroid nodules (FTL) and thyroid abnormalities is pivotal for proper diagnostic and therapeutic work-up. In these two part articles, the role of ultrasound techniques in the characterization of FTL and evaluation of diffuse thyroid diseases is described to expand on the recently published World Federation in Ultrasound and Medicine (WFUMB) thyroid elastography guidelines and review how this guideline fits into a complete thyroid ultrasound exam.

show abstract

Interobserver Agreement and Intraobserver Reproducibility in Thyroid Ultrasound Elastography

Abstract: Good interobserver and intraobserver agreement exists in thyroid ultrasound elastography. Compared with external compression elastography, we found that thyroid elastography with intrinsic compression can produce reliable results.

Cited by 78 publications

References 18 publications

Prospective evaluation of acoustic radiation force impulse technology in the differentiation of thyroid nodules: accuracy and interobserver variability assessment

Prospective evaluation of acoustic radiation force impulse technology in the differentiation of thyroid nodules: accuracy and interobserver variability assessment

Ultrasound elastography in thyroid disease

Thyroid Ultrasound: State of the Art. Part 2 – Focal Thyroid Lesions

Contact Info

Product

Resources

About