1. Preparation before the exam

Before performing the test, adequate preparation is the first step to ensure the accuracy of the test results. Many people don't know much about pre-test precautions, improper preparation can affect image quality, and you may need to reschedule your test. First of all, about diet, most liver ultrasounds require hunger. This is not suitable for doctors to observe polyps and stones, thickening of the walls of internal structures, especially since the intake of fat and protein causes the gallbladder to shrink and expel bile, and the gallbladder atrophy on ultrasound. At the same time, food and gases in the digestive tract can hide part of the image of the liver. In general, it is recommended to fast 6-8 hours before the test (usually scheduled in the morning), refrain from consuming solids after midnight the night before, and drink a small amount of water. On the morning of the day of the test, avoid sugary and greasy drinks such as milk, soy milk, and milk tea.

Secondly, it is important to proactively detail your medical history. This includes carriers of hepatitis B or C, cirrhosis, fatty liver disease, alcoholic liver disease, autoimmune disease, or a history of liver-related surgery. At the same time, be sure to tell your doctor about all medications you are taking, including prescription and over-the-counter medications, especially anticoagulants such as warfarin and aspirin. Any known allergy history to drugs or caulplants (gels to be applied during testing) must also be explained in advance. Finally, relaxation should not be neglected. Excessive tension can cause tension in the abdominal muscles, making it difficult for the probe to fit the skin, interfering with breathing coordination (the doctor may also ask you to temporarily hold your breath during the test), and interfering with image clarity. Ultrasound is like a painless "picture" of the liver, safe and radiation-free. Treat it with a normal mind.超声波检查

2. Detailed Explanation of the Inspection Process

Understanding the process of the examination can help alleviate the fear of the unknown and allow you to work more calmly with your doctor to complete the examination. When you enter the examination room, the environment is usually simple and bright, and the main equipment is the ultrasound host and display. You should lie down on the examination table and adjust your position according to the instructions of your doctor or radiologist. The most common position is lying on your back, and to make the right lobe of the liver more clearly visible, the doctor will open the intercostal space with the left side down and raise the right hand above the head to open the intercostal space and instruct the probe to get a window of better sound wave conduction.

Your doctor or technician will then apply a clear, cold gel called a "cupringer" to your upper right abdomen (around your liver). Its main role is to remove air between the probe and the skin. Because air greatly interferes with the conduction of ultrasonic waves. After application, the doctor will hold a microphone-like probe and carefully observe the black-and-white image of the liver generated in real time on the screen while applying appropriate pressure to the skin of the abdomen to slide and press. During the examination, the doctor will instruct actions such as "take a deep breath and stop" or "exhale slowly" to temporarily immobilize the liver or move it to observe a specific area. The entire scanning process focuses on morphology, parenchymal echo, vascular structures of the liver, and adjacent organs such as the gallbladder, bile ducts, pancreatic head, and right kidney. The test usually lasts about 15 to 30 minutes, depending on the complexity of the liver condition and the careful observation of the doctor. After the examination, the staff will hand you a paper towel to wipe off the cooplant on your body. The gel is harmless to the skin and can be washed off with water.

3. Precautions after the examination

Ultrasound is a very safe and non-invasive test, so the precautions after the examination are relatively simple. First, you can return to your normal diet as soon as the test is completed. If you are hungry and feel hungry or mildly dizzy, it is recommended to start with light, easily digestible foods and avoid overeating and fatty foods immediately for your digestive tract to adapt.

Next, although it is very rare, you need to be careful if there is any abnormal reaction in the body. The test itself does not cause pain or discomfort, but if the doctor applies a little pressure to improve the image, you may experience mild tenderness in more sensitive people or liver tenderness (such as acute hepatitis), which usually relieves quickly after the test. If persistent severe abdominal pain, fever, or other discomfort persists after the test, contact or seek medical attention promptly.

Finally, when it comes to collecting reports, it usually takes 1-2 business days. This period gives the radiologist enough time to carefully analyze all images and prepare a detailed diagnostic report. Once the report is complete, the treating physician or clinic will notify you for collection and interpretation. Please don't rush, don't wait. In Hong Kong's public healthcare system, waiting times can be longer. In private clinics and medical testing centers, reports are usually issued quickly. You can ask about the estimated time of collection of the report during the inspection.

4. Interpretation of ultrasound report (primary review)

When receiving an ultrasound report, we often feel confused when faced with many jargon. Below, we will list some key items that are commonly found in reports to help you gain a better preliminary understanding, but remember that the final diagnosis must be determined by the attending physician based on the clinical situation.

First, the report describes the overall morphology of the liver.size(enlargement or atrophy),end(smooth and sharp or not, it can be uneven during cirrhosis),The essence resonates(homogeneity of hepatocytes). Normal hepatic parenchymal echoes are delicate and uniform, slightly below or equivalent to adjacent renal cortical echoes.

The liver's piping system (including the portal vein, hepatic vein, and hepatic artery) will then be observed to see if the tube diameter is normal and if the blood flow is smooth. At the same time, be sure to checkGallbladderliver size, wall thickness (usually less than 3 mm), presence of stones or polyps, inside and outside the liverBile pathThe cervix may be open or even present (suggesting a possible obstruction).

Finally, the report states anomalies. Here are some common diagnostic examples:

• fatty liver: One of the most common abnormalities. The report states "enhanced hepatic parenchymal echo" or "increased hepatorenal echo contrast", which may indicate enhanced fat accumulation and ultrasound reflection in hepatocytes. By severity, they are divided into mild, moderate and severe.
• Liver cyst: a benign, liquid-filled structure that reports whether its location, size, and boundaries are clear. Treatment is usually not mandatory and requires regular follow-up.
• Cirrhosis: The liver hardens with long-term damage, leaving scars and hardening. Ultrasound shows that the liver surface is uneven, parenchymal echo is rough and heterogeneous, and may be accompanied by splenomegaly and ascites.
• Liver tumors: It is divided into benign (e.g., hemangioma) and malignant (e.g., liver cancer). Ultrasound can detect lesions, but qualitative testing to determine whether they are benign or malignant may require other tests, such as:It has a higher contrast ratio of soft tissues and can provide more detailed information.

It should be emphasized.Liver ultrasoundTests are a great screening tool, but they are not a panacea. In patients with obesity, excess intestinal gas, and deep lesions, the quality of the images may be limited.

5. Tracking and Re-Inspection Reporting

After receiving the report, the most important step is to return to the clinic with the report and discuss it in detail with your doctor. The doctor will develop a follow-up plan based on ultrasound results, symptoms, blood collection data (e.g., liver index, α-fetoprotein), and medical history. If your report shows that everything is normal and you are at low risk of liver disease, your doctor may recommend that you lead a healthy life and have regular checkups every few years. If any abnormalities are found, periodic re-examinations should be carried out according to their nature.

For example, in the case of moderate fatty liver, the doctor may recommend a re-examination of the ultrasound after 6 months to 1 year, weight loss and dietary management. In the case of small liver hemangiomas and cysts, a follow-up visit after 1-2 years may be recommended to confirm stability. If you suspect a liver tumor, your doctor will often recommend further imaging tests to confirm the diagnosis. This will allow for a comparison of different testing methods.

• UltrasoundThe advantages are less radiation, immediate, convenient and low cost, and it is an excellent initial screening and tracking tool.
• Computed tomography (CT): The use of X-rays for tomography provides clearer anatomical results in measuring radiation dose, especially in calcification, acute bleeding, and tumor blood flow assessment.
• : It uses magnetic field and radio imaging, does not use radiation, and has a very high resolution for soft tissues. During a liver test,MRIIn particular, he is good at identifying the nature of various lesions of the liver, such as distinguishing between hemangiomas and liver cancer, and evaluating the presence or absence of cancerous cirrhotic nodules. In addition, bile duct imaging (MRCP) can be performed to clearly show the structure of the bile ducts without the need for contrast agents.

How do I choose the right test method for me? This is not a matter of choice formulas, but a step-by-step process. UsuallyUltrasoundAs a first-line tool. If the results of the ultrasound examination are unclear or a more precise stage is required, the doctor evaluates clinical questions (for example, whether it is vascular or not). Look at the bile ducts. Or to distinguish the nature of the tumor? CT is recommended, orMRI。 Each of these three has its own strengths and complements each other.

6. Frequently Asked Questions (Q&A)

1. Safety of ultrasound?

Ultrasound is known as a very safe imaging method. It uses high-frequency sound waves instead of ionizing radiation such as X-rays, so there is no known harm or long-term side effects to human tissues. Since its inception, it has been widely used in prenatal check-ups and infant examinations for pregnant women, and its safety has been verified for many years. Whether you are a child, adult, or elderly, you can have repeat tests without worrying about radiation buildup.

2. Is ultrasound painful?

The test itself does not cause pain. The only discomfort may be due to the cold coupling applied to the skin and the pressure the doctor applied with the probe to get a better image. For patients with deep livers or a full abdomen, doctors may need to apply a little pressure to reduce sound loss. The sound may feel pressure or slight swelling, but it is usually tolerated and disappears after examination. If you have acute abdominal pain that intensifies when you press on the painful area, consult your doctor as soon as possible.

3. How much does an ultrasound cost?

Fees vary widely in Hong Kong depending on the nature of the medical institution. The following are general reference ranges:

If any abnormalities are found during the examination, it is important to note that further procedures are requiredMRIOther tests significantly increase the cost. It is recommended to check with the organization for fee details before inspection.

7. Understand the inspection process and actively cooperate to obtain accurate results

The liver is a quiet organ, and early lesions often have no obvious symptoms. Pass regularlyLiver ultrasoundSuch non-invasive monitoring tools are an important means of protecting liver health. We hope that through the detailed introduction of this article, you will gain a comprehensive and clear understanding of ultrasound liver examination preparation, process, report interpretation, and follow-up. Fasting preparation before the examination, medical history information, postural coordination during the examination, discussion of detailed reports with the doctor, development of a post-examination reexamination plan, and active participation and cooperation at each link will help to obtain the most accurate diagnostic information. Health check-ups are only part of health care, and eating a balanced diet, exercising regularly, avoiding alcoholism, hepatitis vaccination, and following doctor's instructions for chronic liver disease treatment are fundamental long-term ways to protect your liver. Once you understand the entire process, you can approach the test with a more relaxed and positive attitude and take responsibility for your liver health.

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