Radionuclide cisternogram

定义

A radionuclide cisternogram is a nuclear scan test. It is used to diagnose problems with the flow of spinal fluid.

选择的名字

CSF flow scan; Cisternogram

How the Test is Performed

脊髓穿刺(腰椎穿刺)首先完成。. Small amounts of radioactive material, 叫做放射性同位素, are injected into the fluid within the spine. The needle is removed immediately after the injection.

You will then be scanned 1 to 6 hours after getting the injection. A special camera takes images that show how the radioactive materials travel with the cerebrospinal fluid (CSF) through the spine. The images also show if the fluid leaks outside the spine or brain.

You will be scanned again 24 hours after injection. You may need additional scans possibly at 48 and 72 hours after injection.

How to Prepare for the Test

Most of the time, you do not need to prepare for this test. Your health care provider may give you medicine to calm your nerves if you are very anxious. You will sign a consent form before the test.

You will wear a hospital gown during the scan so the doctors have access to your spine. You will also need to remove jewelry or metallic objects before the scan.

考试的感觉如何

Numbing medicine will be put on your lower back before the 腰椎穿刺. However, many people find 腰椎穿刺 somewhat uncomfortable. This is often due to the pressure on the spine when the needle is inserted.

The scan is painless, although the table may be cold or hard. No discomfort is produced by the radioisotope or the scanner.

Why the Test is Performed

The test is performed to detect problems with the flow of spinal fluid and spinal fluid leaks. 在某些情况下, there may be a concern the cerebrospinal fluid (CSF) fluid is leaking after a trauma to the head or a surgery in the head. This test will be done to diagnose the leak.

正常的结果

A normal value indicates normal circulation of CSF through all parts of the brain and spinal cord.

What Abnormal Results Mean

An abnormal result indicates disorders of CSF circulation. These disorders may include:

• 脑积水 or dilated spaces in your brain due to an obstruction
• 脑脊液漏
• Normal pressure hydrocephalus (NPH)
• Whether or not a CSF shunt is open or blocked

风险

风险 associated with a 腰椎穿刺 include:

• Pain at the injection site
• 出血
• 感染

There is also a very rare chance of nerve damage.

The amount of radiation used during the nuclear scan is very small. Almost all of the radiation is gone within a few days. There are no known cases of the radioisotope causing harm to the person getting the scan. However, as with any radiation exposure, caution is advised if you are pregnant or breastfeeding.

In rare cases, a person may have an 过敏反应 to the radioisotope used during the scan. This may include a serious 过敏反应.

注意事项

You should lie flat after the 腰椎穿刺. This can help prevent a headache from the 腰椎穿刺. No other special care is necessary.

参考文献

Mettler FA, Guiberteau MJ. 中枢神经系统. In: Mettler FA, Guiberteau MJ, eds. Essentials of Nuclear Medicine Imaging. 3日艾德. Philadelphia, PA: Elsevier; 2019:chap 3.

Swanson JW, Bartleson JD. 头部和面部疼痛. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. Bradley's and Daroff's Neurology in Clinical Practice. 8日艾德. Philadelphia, PA: Elsevier; 2022:chap 20.