Overview of thyroid B-ultrasound

Thyroid B-ultrasound is a non-invasive diagnostic method that uses ultrasound imaging technology to examine the morphology, structure and blood flow of the thyroid gland. It is mainly used to screen for nodules, cysts, inflammation or tumors and other lesions. Its core advantage is that it is safe, real-time and non-radiative, making it the first choice primary screening tool for thyroid diseases. The main content is divided into three parts:Check principle(ultrasonic reflection imaging),Indications(Nodule assessment, auxiliary diagnosis of hyperthyroidism/hypothyroidism, etc.) andclinical significance(Identification of benign and malignant). Secondary content includes inspection procedures, precautions, and limitations.

Principles and technical characteristics of thyroid B-ultrasound

Thyroid B-ultrasound uses high-frequency sound waves to penetrate thyroid tissue and generate images by receiving reflected signals. Its resolution can reach 1-2 mm, and it can clearly display the size of the thyroid gland, echo strength and blood flow distribution. For example,hypoechoic nodulesmay indicate malignant risks, whilecystic changesMostly benign. The equipment is usually equipped with a color Doppler function, which can observe blood flow signals and assist in determining hyperthyroidism (increased blood flow) or Hashimoto's thyroiditis (decreased blood flow). No special preparation is required for the examination, but avoid wearing necklaces and other accessories that may interfere with the imaging.

Clinical application scenarios of thyroid B-ultrasound

This check applies to a variety of situations:1) Physical examination and screening, if asymptomatic nodules are found;2) Follow-up monitoring, track changes in known nodules;3) Preoperative evaluation, clarify the relationship between the tumor location and surrounding tissues. For example, the American Thyroid Association (ATA) guidelines recommend that nodules >1 cm in diameter require B-ultrasound evaluation. In addition, B-ultrasound can also guide fine-needle aspiration biopsy (FNA) to improve the accuracy of sampling. However, it should be noted that B-ultrasound cannot directly diagnose cancer and needs to be combined with pathological results.

Inspection process and precautions

During the examination, the patient lies on his back with the neck pillow tilted back. The doctor applies coupling agent and slides the probe for scanning. The whole process takes about 10-15 minutes. Results typically include descriptions of thyroid volume, nodule size, borders, calcification, etc. Things to note:1) No need to fast;2) Avoid strenuous exercise before the examination(affects blood flow);3) It can also be done safely during pregnancy. The limitation is that deep or tiny lesions (<3mm) may be missed, in which case CT or MRI must be combined.

Summary and equipment manufacturer information

Thyroid B-ultrasound is the cornerstone of thyroid disease diagnosis and is both safe and practical, but it needs to be combined with comprehensive clinical judgment. Mainstream equipment manufacturers includeGE Healthcare (such as LOGIQ series),Philips (EPIQ series)andMindray (M7, etc.), prices range from 100,000 to one million yuan. The data refers to the "China Thyroid Disease Diagnosis and Treatment Guidelines" and the World Health Organization (WHO) imaging standards. The specific equipment parameters are as follows:

Quote sources:1) "China's Guidelines for the Diagnosis and Treatment of Thyroid Disease" (2022 Edition); 2) World Health Organization (WHO) medical imaging technology standards; 3) GE Healthcare, Philips, and Mindray official website product instructions