Shear wave elastography versus real-time elastography on evaluation thyroid nodules: a preliminary study.

Area of Science:

• Medical imaging
• Diagnostic ultrasound
• Thyroid pathology

Background:

• Distinguishing malignant from benign thyroid nodules is crucial for appropriate patient management.
• Ultrasound-based elastography techniques, including shear wave elastography (SWE) and real-time elastography (RTE), are increasingly used for this purpose.

Purpose of the Study:

• To conduct a comparative evaluation of SWE and RTE in differentiating malignant from benign thyroid nodules.
• To assess the diagnostic accuracy of SWE and RTE parameters in identifying thyroid malignancies.

Main Methods:

• A study involving 49 patients with 64 focal thyroid nodules.
• Pre-operative assessment using both SWE and RTE, with measurement of SWE elasticity indices and assessment of RTE elastograms by Rago criteria.
• Histopathological results from surgery served as the gold standard for diagnosis.

Main Results:

• SWE elasticity indices were significantly higher in malignant nodules compared to benign ones (P<0.05).
• The area under the ROC curve (AUC) for SWE parameters ranged from 0.788 to 0.840, not significantly different from RTE's AUC of 0.880.
• At the optimal cutoff of 38.3 kPa for mean SWE value, diagnostic performance metrics were comparable between SWE and RTE, with slight variations in specificity, sensitivity, and accuracy.

Conclusions:

• Shear wave elastography (SWE) is a promising tool for differentiating thyroid nodules.
• SWE demonstrates comparable diagnostic results to real-time elastography (RTE) in this evaluation.
• Both elastography techniques contribute valuable information for thyroid nodule characterization.