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A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images

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Diagnostic performance of gray-scale US and elastography in solid thyroid nodules.

Hee Jung Moon¹, Ji Min Sung, Eun-Kyung Kim

¹Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, 120-752 Seoul, Korea.

|February 24, 2012

Summary

Gray-scale ultrasonography (US) demonstrated superior diagnostic performance for thyroid nodules compared to elastography. Elastography alone or combined with US did not improve differentiation of benign and malignant nodules.

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Area of Science:

Radiology
Medical Imaging
Oncology

Background:

Thyroid nodules are common, and differentiating benign from malignant types is crucial for appropriate management.
Gray-scale ultrasonography (US) is a primary imaging modality, but its accuracy can be limited.
Elastography is a newer technique aiming to improve nodule characterization.

Purpose of the Study:

To compare the diagnostic performance of gray-scale US and elastography in distinguishing benign from malignant thyroid nodules.
To evaluate the added value of elastography when combined with gray-scale US.

Main Methods:

Retrospective study of 703 solid thyroid nodules in 676 patients.
Nodules assessed using gray-scale US criteria (hypoechogenicity, margins, calcifications, shape) and elastography (Rago and Asteria criteria).
Diagnostic performance metrics (sensitivity, specificity, NPV, PPV, accuracy, OR) compared between gray-scale US alone, elastography alone, and combined approaches.

Main Results:

Gray-scale US showed higher sensitivity (91.7%) and negative predictive value (NPV) (94.7%) compared to elastography (Rago: 15.7% sensitivity, 71.7% NPV; Asteria: 65.4% sensitivity, 79.1% NPV).
The combination of elastography with gray-scale US did not improve diagnostic performance and, in some cases, reduced specificity and accuracy.
Odds ratios (ORs) for malignancy prediction were significantly higher for gray-scale US (22.1) than for elastography (Rago: 3.7; Asteria: 2.6).

Conclusions:

Gray-scale US features alone are more effective than elastography for differentiating benign and malignant thyroid nodules.
Elastography, by itself or in combination with gray-scale US, is not a useful tool for guiding fine-needle aspiration biopsy decisions.
Further research may be needed to explore specific elastographic techniques or patient subgroups where it might offer benefit.