Related Experiment Videos
Tissue harmonic imaging of thyroid nodules: initial experience
Kazimierz T Szopinski1, Maciej Wysocki, Anna M Pajk
1Department of Diagnostic Imaging, Second Faculty of Medicine, Medical University of Warsaw, Warsaw, Poland.
Summary
Tissue harmonic imaging significantly enhances the visualization and gray scale contrast of thyroid nodules, improving lesion detectability and characterization during ultrasound examinations.
Area of Science:
- Medical Imaging
- Diagnostic Ultrasound
- Endocrinology
Background:
- Thyroid nodules are common, and accurate characterization is crucial for diagnosis.
- Conventional ultrasound imaging can have limitations in visualizing subtle differences between nodules and surrounding tissue.
Purpose of the Study:
- To evaluate the impact of tissue harmonic imaging (THI) on thyroid nodule visualization.
- To assess the effect of THI on gray scale contrast between thyroid nodules and parenchyma.
Main Methods:
- Prospective study of 144 patients with 148 thyroid lesions.
- Comparison of fundamental frequency ultrasound with tissue harmonic imaging using a 7.5-MHz linear probe.
- Quantitative measurement of gray scale intensity and contrast, plus qualitative assessment of conspicuity and border definition by observers.
Main Results:
- THI improved gray scale contrast in 78.4% of lesions.
- Overall conspicuity and border definition were improved or equal in harmonic mode for most lesions.
- The study identified various nodule types, including benign, papillary carcinoma, anaplastic carcinoma, and metastatic lesions.
Conclusions:
- Tissue harmonic imaging, as an adjunct to conventional sonography, may improve thyroid lesion detectability.
- THI can enhance the characterization of thyroid nodules.