肝扫描

定义

A liver scan uses a radioactive material to check how well the liver or spleen is working and to assess masses in the liver.

选择的名字

Technetium scan; Liver technetium sulfur colloid scan; Liver-spleen radionuclide scan; Nuclear scan - technetium; Nuclear scan - liver or spleen

How the Test is Performed

The health care provider will inject a radioactive material called a radioisotope into one of your veins. After the liver has soaked up the material, you will be asked to lie on a table under the scanner.

The scanner can tell where the radioactive material has gathered in the body. Images are displayed on a computer. You may be asked to remain still, or to change positions during the scan.

How to Prepare for the Test

You will be asked to sign a consent form. You will be asked to remove jewelry, 假牙, and other metals that can affect the scanner's functions.

You may need to wear a hospital gown.

How the Test will Feel

You will feel a sharp prick when the needle is inserted into your vein. You should not feel anything during the actual scan. If you have problems lying still or are very anxious, you may be given a mild medicine (sedative) to help you relax.

Why the Test is Performed

The test can provide information about liver and spleen function. It is also used to help confirm other test results.

The most common use for a liver scan is to diagnose a condition called benign focal nodular hyperplasia, 或FNH, which causes a non-cancerous mass in the liver.

正常的结果

The liver and spleen should look normal in size, shape, and location. The radioisotope is absorbed evenly.

What Abnormal Results Mean

Abnormal results may indicate:

• Focal nodular hyperplasia or adenoma of the liver
• 脓肿
• Budd-Chiari syndrome
• 感染
• 肝脏疾病 (如 肝硬化 or 肝炎)
• Superior vena cava obstruction
• 脾梗死 (组织死亡)
• 肿瘤

风险

Radiation from any scan is always a slight concern. The level of radiation in this procedure is less than that of most x-rays. It is not considered to be enough to cause harm to the average person.

Pregnant or nursing women should consult their provider before any exposure to radiation.

注意事项

Other tests may be needed to confirm the findings of this test. 这些可能包括:

• Abdominal ultrasound
• 腹部CT扫描
• 腹部核磁共振扫描
• 肝活组织检查

This test is used infrequently. Instead, MRI or CT scans are more often used to evaluate the liver and spleen.

参考文献

Mettler FA, Guiberteau MJ. Gastrointestinal tract. In: Mettler FA, Guiberteau MJ, eds. Essentials of Nuclear Medicine and Molecular Imaging. 7日艾德. Philadelphia, PA: Elsevier; 2019:chap 7.

Squires JH, Narayanan S, Tadros S. Fundamentals of pediatric radiology. In: Zitelli BJ, McIntire SC, Nowalk AJ, Garrison J, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 8日艾德. Philadelphia, PA: Elsevier; 2023:chap 25.

Tirkes T, Sandrasegaran K. Investigative imaging of the liver. In: Saxena R, ed. Practical Hepatic Pathology: A Diagnostic Approach. 第二版. Philadelphia, PA: Elsevier; 2018:chap 4.