Jinyoung Kim, Min-Hee Kim, Dong-Jun Lim, Hankyeol Lee, Jae Jun Lee, Hyuk-Sang Kwon, Mee Kyoung Kim, Ki-Ho Song, Tae-Jung Kim, So Lyung Jung, Yong Oh Lee, Ki-Hyun Baek
Endocrinol Metab. 2025;40(2):216-224. Published online January 13, 2025
Background This study aimed to evaluate the applicability of deep learning technology to thyroid ultrasound images for classification of thyroid nodules.
Methods This retrospective analysis included ultrasound images of patients with thyroid nodules investigated by fine-needle aspiration at the thyroid clinic of a single center from April 2010 to September 2012. Thyroid nodules with cytopathologic results of Bethesda category V (suspicious for malignancy) or VI (malignant) were defined as thyroid cancer. Multiple deep learning algorithms based on convolutional neural networks (CNNs) —ResNet, DenseNet, and EfficientNet—were utilized, and Siamese neural networks facilitated multi-view analysis of paired transverse and longitudinal ultrasound images.
Results Among 1,048 analyzed thyroid nodules from 943 patients, 306 (29%) were identified as thyroid cancer. In a subgroup analysis of transverse and longitudinal images, longitudinal images showed superior prediction ability. Multi-view modeling, based on paired transverse and longitudinal images, significantly improved the model performance; with an accuracy of 0.82 (95% confidence intervals [CI], 0.80 to 0.86) with ResNet50, 0.83 (95% CI, 0.83 to 0.88) with DenseNet201, and 0.81 (95% CI, 0.79 to 0.84) with EfficientNetv2_ s. Training with high-resolution images obtained using the latest equipment tended to improve model performance in association with increased sensitivity.
Conclusion CNN algorithms applied to ultrasound images demonstrated substantial accuracy in thyroid nodule classification, indicating their potential as valuable tools for diagnosing thyroid cancer. However, in real-world clinical settings, it is important to aware that model performance may vary depending on the quality of images acquired by different physicians and imaging devices.
Citations
Citations to this article as recorded by
Molecular intelligence and immune reconnaissance in thyroid cancer: a new paradigm for diagnosis, risk stratification, and therapeutic precision Marcio J. Concepción-Zavaleta, Jenyfer M. Fuentes-Mendoza, Alfredo Cruz-Quintá, Argelia V. Cadena-Guerrero, Ximena Barrón, Luis Concepción-Urteaga, Cristian D. Armas, José Paz-Ibarra, Juan Eduardo Quiroz-Aldave Expert Review of Anticancer Therapy.2026; 26(5): 585. CrossRef
Deep Learning for Ultrasound Classification to Identify Noninvasive Follicular Thyroid Neoplasms with Papillary–Like Nuclear Features I-Hung Chien, Yi-Chiung Hsu, Shih-Ping Cheng Journal of Imaging Informatics in Medicine.2026;[Epub] CrossRef
Knowledge-Prompted Trustworthy Disentangled Learning for Thyroid Ultrasound Segmentation With Limited Annotations Wenxu Wang, Weizhen Wang, Qianjin Feng, Yu Zhang, Zhenyuan Ning IEEE Transactions on Image Processing.2026; 35: 983. CrossRef
Integrating Robotic Bilateral Axillo-Breast Approach Thyroidectomy with Molecular Diagnostics and Artificial Intelligence in Thyroid Cancer Care Qiang Deng, Xiaoping Men, Duo Jin, Yuzhuo Bai Biomolecules & Therapeutics.2026; 34(1): 45. CrossRef
Improving Non-Invasive Prediction of Thyroid Nodule Malignancy: A Machine Learning-Based Clinical Approach Maja Reiner, Hanna Drobińska, Michał Miciak, Michał Kisiel, Szymon Biernat, Krzysztof Kaliszewski Cancer Management and Research.2026; Volume 18: 1. CrossRef
An early evaluation of MedSigLIP in thyroid cytology: a comparative frozen-encoder benchmark against ImageNet-pretrained encoders Mehmet Poyrazer, Rıdvan Erten Frontiers in Endocrinology.2026;[Epub] CrossRef
The Role of Cytology, Histology and Molecular Pathology in the Diagnostic Process of Thyroid Nodules Mathilde Ribeiro, Sule Canberk, Massimo Bongiovanni Cancers.2026; 18(11): 1814. CrossRef
Classification of Thyroid Nodules from Ultrasound Images Using Deep Learning Methods Mehmet Emre Özbey, Mehmet Kaplan, Sercan Yalçın, Muhammed Yıldırım Muş Alparslan Üniversitesi Fen Bilimleri Dergisi.2026; 14(1): 95. CrossRef
Explainable AI for accurate diagnosis of papillary thyroid carcinoma via fine-needle aspiration cytopathology Ahmet Kilicarslan, Canan Tastimur, Gokhan Gundogdu, Erhan Akin The Visual Computer.2026;[Epub] CrossRef
Artificial intelligence-assisted risk stratification of thyroid nodules with atypia of undetermined significance Jinyoung Kim, Jeongmin Lee, Jeonghoon Ha, Ohjoon Kwon, Ki-Hyun Baek, Chang Myeon Song, Hyeon A Lee, Hyemi Kwon, Inyoung Youn, Mi-ri Kwon, Dong-Jun Lim European Thyroid Journal.2026;[Epub] CrossRef
Artificial intelligence in otorhinolaryngology: a scoping review of diagnostic, surgical, and rehabilitative applications Wan-Ling Lin, Sheng-Han Chen, Shih-Shuan Fang The Egyptian Journal of Otolaryngology.2026;[Epub] CrossRef
Diagnostic performance of multimodal ultrasound-based deep learning models in differentiating benign and malignant thyroid nodules Huajie Ding, Lei Na, Meiling Hao, Wanlou Chen, Zhen Zhang Frontiers in Oncology.2026;[Epub] CrossRef
Development and clinical application of an ultrasound-based deep learning model for preoperative staging of colorectal cancer Jing Zhao, Li-Juan Du, Ying Liu, Dan-Dan Zhu, Hui-Qing Wang, Ming-Kui Shen, Ling-Yue Wang, Hai-Yan Wang World Journal of Gastrointestinal Oncology.2026;[Epub] CrossRef
Automated segmentation of thyroid tissue and carotid artery in ultrasound videos using expert-in-the-loop deep learning: a foundational step toward AI-assisted thyroid diagnostics Maria Bolomiti, Joel Burman, Keyur Radiya, Olav Inge Håskjold, Karl Øyvind Mikalsen, Vegard Heimly Brun Updates in Surgery.2026;[Epub] CrossRef
Deep Learning for the Diagnosis and Treatment of Thyroid Cancer: A Review Rili Gao, Shangqing Mai, Song Wang, Wuqiang Hu, Zhangqi Chang, Guozhi Wu, Haixia Guan Endocrine Practice.2025; 31(12): 1608. CrossRef
Artificial Intelligence for Thyroid Ultrasound: Clinical Performance, Pitfalls, and Practice Integration Junseok Kang, Jihyun Ahn, Jeong Hun Hah Clinical Ultrasound.2025; 10(2): 59. CrossRef