What is頸部超聲波Check?

Neck ultrasound is a non-invasive imaging diagnostic technique that uses high-frequency sound waves (ultrasound) to detect the internal structures of the neck. When the sound waves encounter the interface of different tissues (such as thyroid, blood vessels, muscles, and lymph nodes), they generate echoes and are received by the probe, and the instrument converts these echoes into real-time dynamic images and displays them on the screen. This technique eliminates the use of radiation, making it extremely safe and repeatable, making it one of the preferred tools for assessing neck soft tissue lesions. Its main purpose is to detect and evaluate thyroid nodules, tumors, and inflammation, check whether the lymph nodes in the neck are abnormally enlarged, and assess whether there are atherosclerotic plaques or stenosis in the carotid arteries.

Compared to other common imaging tests,Neck ultrasoundIt has its own unique advantages and positioning. X-rays are mainly used to observe bone structure, and the resolution of soft tissues is extremely low, and it is rarely used for neck soft tissue assessment. Computed tomography (CT) scans provide clear cross-sectional images, but they involve radiation exposure and are sometimes not as fine as ultrasound in soft tissues such as the thyroid gland. Magnetic resonance imaging (MRI) is good at showing the relationship between soft tissues and nerve structures, but it is long-term, expensive, and not suitable for patients with metal implants in the body. In contrast,頸超聲波檢查With its radiation-free, real-time dynamics, blood flow assessment (color Doppler ultrasound), relatively low cost, and easy to perform fine needle aspiration biopsy guidance, it has become the cornerstone of initial screening and regular follow-up of neck lesions. However, ultrasound has limited penetration and requires CT or MRI as an aid for deep layers or structures obscured by bone (e.g., behind the trachea, mediastinal space).

Who is suitable for neck ultrasound?

This test is not required for everyone, but is for people with specific symptoms, signs or high-risk groups. The common indications are quite wide, and the first is the evaluation of thyroid disease. When the patient feels a lump in the front of the neck, difficulty swallowing, hoarseness, unexplained palpitations, or abnormal weight changes, the doctor will recommend itThyroid ultrasoundto check the shape, size, and presence of nodules or tumors of the thyroid gland. Secondly, it is a diagnosis for swollen lymph nodes in the neck. Whether it's single or multiple, painless or tender swollen lymph nodes, ultrasound can help distinguish whether it's reactive hyperplasia, inflammatory infection, or malignant metastases or lymphoma that require vigilance. Third, it is to evaluate carotid artery health, especially in patients at risk of stroke or who have symptoms of transient ischemic attack (mini-stroke), ultrasound can effectively measure carotid artery intima thickness, detect atherosclerotic plaques and their stability, and assess the degree of vascular stenosis.

In addition to those with obvious symptoms mentioned above, some high-risk groups should also consider neck ultrasound as a screening tool. According to the clinical guidelines of the Hong Kong Hospital Authority and private healthcare institutions, the following groups are at high risk:

• For those with a family history of thyroid cancer:In particular, first-degree relatives have a history of medullary thyroid cancer or papillary cancer.
• Those who have received head and neck radiotherapy:For example, those who have received radiation therapy for lymphoma or childhood cancer have a significantly increased risk of thyroid cancer.
• People with autoimmune thyroid disease:For example, patients with Hashimoto's thyroiditis or Graves' disease need to be monitored regularly for changes in thyroid structure.
• Those with multiple cardiovascular risk factors:For patients with long-term hypertension, hyperlipidemia, and diabetes, carotid ultrasound screening can be considered to assess the degree of arteriosclerosis and stroke risk.
• If abnormalities are found on palpation:Even if there are no symptoms, the doctor will feel a suspicious lump or swollen lymph nodes in the neck during a routine physical examination.

For these high-risk groups, it is carried out regularlyCervical ultrasoundIt helps to detect lesions early and intervene in time.

Preparation before the examination

Compared to many imaging tests, the preparation of a neck ultrasound examination is relatively simple, but there are still several key things to note to ensure a smooth examination process and accurate results. First of all, about "Do you need to have an empty stomach?" The answer to this common question is usually "no." Generally, routine neck ultrasound (including thyroid and lymph node examination) does not require fasting. However, if the examination includes "carotid ultrasound", some medical institutions or doctors may advise patients to avoid eating too greasy foods or high-fat meals 2-4 hours before the examination to avoid high blood lipid concentrations, which may slightly affect the clarity of blood flow signals. The safest thing to do is to check with the medical institution directly if you need to be fasting or if there are any special dietary restrictions when making an appointment.

On the day of the examination, the items that patients need to bring include:Identification documents、Referral letter or doctor referral form(if any),Past related inspection reports and video CDs(especially previous ultrasound, CT, and MRI reports), which are crucial for doctors to compare before and after and evaluate changes in the condition. In addition, if thyroid disease is known, it is best to bring a recent thyroid function (e.g., TSH, T3, T4) blood draw report.

Before starting the examination, be sure to inform the operating physician or radiologist of your complete medical history and medication status. Key points to be informed include:

• Relevant medical history:History of thyroid disease (hyperactive or low), family history of thyroid cancer, history of radiation therapy to the head and neck, history of autoimmune diseases, history of cardiovascular disease (e.g., stroke, coronary heart disease).
• Allergy history:Although the ultrasound examination itself does not use contrast agents, if ultrasound-guided fine needle aspiration may be required later, it is still necessary to inform whether there is an allergy to anesthetics or any drugs.
• Currently taking medications:In particular, anticoagulants (such as warfarin, aspirin, clopidogrel, etc.) are related to safety assessment when biopsy is required. Do not stop taking the drug on your own, but you must let your doctor know.
• Neck discomfort symptoms:Clearly inform your doctor of the specific location, nature (e.g., pain, pressure) and duration of your discomfort.

In terms of clothing, it is recommended to wear loose tops with front buttons and avoid high collars, tights, or pullovers to easily expose the neck and supraclavicular area. Necklaces and other accessories should also be removed before inspection.

Detailed explanation of the inspection process

Understanding the examination process can help eliminate tension. When you enter the ultrasound room, the radiologist or doctor will ask you to lie on the examination table, usually with a pillow to raise your shoulders and neck, so that your head is slightly tilted. You are awake and able to breathe and swallow normally, and your doctor may ask you to do swallowing movements to observe the movement of your thyroid gland with swallowing.

Your doctor will then apply a clear, cool gel to your neck. This gel layer fills the tiny gaps between the probe and the skin, eliminating air interference and ensuring that sound waves can be conducted effectively. There may be a cold sensation when applying the gel, but this is normal and temporary. The doctor will then hold an ultrasound probe and slide it over the skin of your neck with appropriate pressure to scan it from different angles and directions. You may hear a slight "beep" sound from the instrument, which is the sound of the Doppler mode detecting blood flow. During the examination, the doctor may pause at a specific location, press on it, or mark the image, which is usually a structure that needs to be carefully evaluated.

A complete oneUltrasound of the neck, usually about 15 to 30 minutes. The length of time depends on the complexity of the examination (e.g., only the thyroid gland or a comprehensive examination of the thyroid gland along with lymph nodes and carotid arteries) and whether abnormal lesions that require multi-angle evaluation are found. There is little discomfort throughout the process, and the pressure exerted by the probe is usually light, unless you press on an inflamed lymph node or a larger nodule, which may cause slight tenderness.

In Hong Kong, the examination may be performed by a specialist in diagnostic radiology or a professionally trained radiologist. An experienced doctor not only obtains images but also performs preliminary interpretations in real time. They may briefly explain what they saw during the examination, such as "Here's a small cyst that looks benign," "The lymph node is in normal shape," or "The border of this nodule needs attention." However, formal, detailed written reports usually need to be issued after all images have been reviewed by specialists, so the final results still need to wait for the report to be completed. After the examination, the doctor will wipe off the gel from your neck with a tissue, and you can resume normal activities without any sequelae or restrictions.

Interpretation and follow-up of inspection results

After the examination, the most important thing is the meaning of the results. A complete copyNeck ultrasoundThe report details the size, morphology, echo characteristics, boundaries, internal structure, and blood flow of the organs seen. Common results can be divided into several broad categories:

• Completely normal:the thyroid gland is uniform in size and echo, without nodules or lumps; Lymph nodes are normal in shape and size; The carotid artery lining is smooth and there is no visible plaque or narrowing. This is the most desirable result.
• Benign findings:This is the most common scenario. For example, simple cysts (filled with fluid), glial cysts, or typical benign nodules (such as uniform echoes, clear borders, and no microcalcifications). Cervical lymph nodes may proliferate reactively due to recent infection, but the morphology maintains benign features (eg, clear corticomedullary demarcation, hilar blood flow). A small amount of stable plaque may be found in the carotid artery but does not cause meaningful stenosis (usually < 50% stenosis).
• Uncertainty or Suspicious Findings:Certain features require further evaluation. For example, thyroid nodules have worrying features such as low echoes, irregular borders, tiny calcifications, or longitudinal growth larger than lateral growth. At this time, the doctor will stratify the risk of the nodule according to international standards (such as the TI-RADS grading system) and recommend whether ultrasound-guided fine needle aspiration biopsy is necessary to obtain cytological diagnosis. If the lymph nodes show cortical thickening, hilar structure loss, or abnormal blood flow patterns, close follow-up or biopsy should be considered.
• Clearly abnormal/malignant may be high:If ultrasound reveals a highly suspected malignant lesion, the report will clearly indicate and strongly recommend immediate biopsy or referral to surgery for further treatment.

Subsequent treatment recommendations and follow-up frequency depend entirely on the results of the examination. For completely normal or typically benign findings, no treatment may be required, only regular health check-ups are recommended. Taking benign small thyroid nodules as an example, it is usually recommended to do it every 6 to 12 monthsThyroid ultrasoundTrack to see if there are any changes in its size and characteristics. If the nodule is stable and does not grow during the follow-up period, the subsequent interval can be extended to 1-2 years. If a malignant tumor is found, it is necessary to refer to surgical evaluation for surgical removal. For carotid stenosis, mild to moderate stenosis (50%-70%) is usually recommended for medication control (e.g., hypolipidemic drugs, antiplatelet drugs) and annual follow-up ultrasound; Severe stenosis (>70%) with symptoms should consider carotid endarterectomy or stenting.

When communicating with your doctor about the test results, it is recommended to take the initiative to ask questions to fully understand your condition. You can ask:

• "What are the specific characteristics of my nodules/lymph nodes/plaques? What type of risk classification does it belong to?"
• "Based on this result, what do you suggest I do next? (Continue to observe, take medicine, or do biopsy/surgery?) ）」
• "If you need to be tracked, when should you check again?"
• "Are there any symptoms or contraindications I need to be aware of in my daily life?"

Finally, many people are concerned甲狀腺超聲波價錢。 In Hong Kong, the cost of this test varies greatly depending on the nature of the medical institution. If there is a referral from a doctor in a public hospital, the cost is relatively low, but the waiting time may be longer. In private hospitals or clinics,Cervical ultrasoundThe cost is more flexible. The following is a reference to a rough market price range (please refer to the latest quotation of each institution for actual fees):

When choosing, in addition to considerationThyroid ultrasound price, and should pay more attention to the equipment level of medical institutions, the experience and professional qualifications of operating physicians, and the detail and accuracy of reports. A professional and clear examination report and explanation are the cornerstone of all subsequent medical decisions, and its value far exceeds the cost of the examination itself.

Posted by: temple at 12:29 AM | No Comments | Add Comment
Post contains 2220 words, total size 16 kb.