Interobserver agreement and intraobserver reproducibility in thyroid ultrasound elastography

Area of Science:

• Endocrinology
• Radiology
• Medical Imaging

Background:

• Thyroid nodules require accurate diagnostic methods.
• Ultrasound elastography is a developing technique for assessing thyroid nodule malignancy.
• Evaluating the reliability of elastography is crucial for clinical application.

Purpose of the Study:

• To assess interobserver agreement in thyroid ultrasound elastography.
• To evaluate intraobserver reproducibility of thyroid ultrasound elastography.
• To determine the reliability of intrinsic compression elastography for thyroid nodules.

Main Methods:

• Prospective study of 56 patients with thyroid nodules scheduled for surgery.
• Three endocrinologists performed ultrasound elastography using intrinsic compression (carotid artery pulsation).
• An elasticity contrast index was calculated, and Pearson correlation coefficients assessed agreement.

Main Results:

• Significant interobserver agreement was found, with correlation coefficients ranging from 0.73 to 0.79 (p < 0.01).
• High intraobserver reproducibility was observed, with correlation coefficients ranging from 0.73 to 0.87 (p < 0.01).
• The elasticity contrast index showed good reliability among examiners.

Conclusions:

• Thyroid ultrasound elastography exhibits good interobserver and intraobserver agreement.
• Intrinsic compression elastography is a reliable method for evaluating thyroid nodules.
• These findings support the clinical utility of ultrasound elastography in thyroid nodule assessment.