镓扫描

定义

A gallium scan is a test to look for swelling (inflammation), infection, or cancer in the body. It uses a radioactive material called gallium and is a type of 核医学 考试.

一个相关的测试是A gallium scan 肺的.

选择的名字

Liver gallium scan; Bony gallium scan

How the Test is Performed

You will get gallium injected into your vein. Gallium is a radioactive material. The gallium travels through the bloodstream and collects in the bones and certain organs.

Your health care provider will tell you to return at a later time to be scanned. The scan will take place 6 to 48 hours after the gallium is injected. The test time depends on what condition your doctor is looking for. In some cases, people are scanned more than once.

You will lie on your back on the scanner table. A special camera detects where the gallium has gathered in the body.

You must lie still during the scan, which takes 30 to 60 minutes.

How to Prepare for the Test

Stool in the bowel can interfere with the test. You may need to take a laxative the night before you have the test. Or, you may get an enema 1 to 2 hours before the test. You may eat and drink liquids normally.

You will need to sign a consent form. You will need to take off all jewelry and metal objects before the test.

How the Test will Feel

You will feel a sharp prick when you get the injection. The site may be sore for a few minutes.

The hardest part of the scan is holding still. The scan itself is painless. The technician can help make you comfortable before the scan begins.

Why the Test is Performed

This test is rarely performed. It may be done to look for the cause of a fever that has lasted a few weeks without an explanation.

正常的结果

Gallium normally collects in bones, the liver, spleen, the large bowel, and breast tissue.

What Abnormal Results Mean

Gallium detected outside normal areas can be a sign of:

• 感染
• 炎症
• 肿瘤,包括 霍奇金病 or 非霍奇金淋巴瘤

The test may be done to look for lung conditions such as:

• 主要的 肺动脉高压
• 肺栓塞物
• Respiratory infections, most often 卡式肺 肺炎
• 结节病
• 硬皮病 肺的
• 肺肿瘤

风险

There is a small risk for radiation exposure. This risk is less than that with x射线 或者CT扫描. Pregnant or nursing women and young children should avoid radiation exposure if at all possible.

注意事项

Not all cancers show up on a gallium scan. Areas of inflammation, such as recent surgical scars, may show up on the scan. However, they do not necessarily indicate an infection.

参考文献

Contreras F, Perez J, Jose J. 成像技术概述. In: Miller MD, Thompson SR, eds. 口腔、Drez & Miller's Orthopaedic Sports Medicine. 5日艾德. Philadelphia, PA: Elsevier; 2020:chap 7.

Harisinghani MG, Chen JW, Weissleder R. 成像物理. In: Harisinghani MG, Chen JW, Weissleder R, eds. Primer of Diagnostic Imaging. 6日艾德. Philadelphia, PA: Elsevier; 2019:chap 14.

Seabold JE, Palestro CJ, Brown ML, et al. Society of 核医学 procedure guideline for gallium scintigraphy in inflammation.The Society of Nuclear Medicine. 版本3.0. s3.amazonaws.com/rdcms-snmmi/files/production/public/docs/Gallium_Scintigraphy_in_炎症_v3.pdf. 2004年6月2日批准. Accessed September 30, 2022.

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.