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KMID : 1103720160740060365
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Journal of the Korean Society of Radiology
2016 Volume.74 No. 6 p.365 ~ p.372
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Virtual Touch Tissue Quantification in the Differential Diagnosis of Benign and Malignant Thyroid Nodules
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Ha Seung-Mi
Cho Seong-Whi
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Abstract
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Purpose: The aim of this study was to evaluate the diagnostic utility of the virtual touch tissue quantification (VTQ) technology for differentiating between benign and malignant thyroid nodules.
Materials and Methods: 198 nodules (168 benign and 30 malignant nodules) identified in 164 patients with available VTQ velocity data and fine-needle aspiration cytology or post-surgical pathological results were included. The VTQ velocities of nodules and adjacent thyroid tissue were examined.
Results: Malignant nodules had a significantly higher VTQ velocity (3.06 ± 1.04 m/s, range: 1.90?6.46 m/s) than that of benign nodules (2.40 ± 0.85 m/s, range: 0.69?8.09 m/s) (p = 0.002). The VTQ velocity ratio between malignant nodules and adjacent thyroid tissue (1.39 ± 0.43, range: 0.89?2.65) was also statistically higher than that of benign nodules (1.15 ± 0.44, range: 0.26?3.47) (p = 0.008). The area under the receiver operating characteristic curve for the VTQ velocity was 0.72 with a cutoff point of 2.37 m/s and that of the VTQ velocity ratio was 0.68 with a cutoff point of 1.26. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for the VTQ velocity were 86.7%, 50.6%, 23.9%, 95.5%, and 56.1%, respectively and 60.0%, 72.0%, 27.7%, 91.0%, and 70.2%, respectively for the VTQ velocity ratio.
Conclusion: VTQ may be helpful in differentiating malignant and benign thyroid nodules with high negative predictive value.
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KEYWORD
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Acoustic Radiation Force Impulse Imaging, Elasticity Imaging Techniques, Thyroid Nodules, Ultrasonography
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