What is SIRTS?
Selective internal radiation therapy (SIRT), or radioembolisation, is localised radiation treatment for cancer involving the liver. A radiation source, yttrium-90, is bound to small resin beads and delivered through the blood stream into the liver where the cancer is.
Why perform SIRTS?
SIRT can be helpful for patients with either primary liver cancer (hepatocellular carcinoma) or cancer that has spread to the liver from elsewhere that cannot be removed surgically.
How does SIRTS work?
There are two parts to this procedure, usually about 1-2 weeks apart, both under sedation.
The first procedure involves performing an angiogram of the liver through either the artery in the wrist or groin, to define the blood supply. Your international radiologist may need to blocking off some of the blood vessels to the liver that communicate with blood vessels supplying other organs. This is done to minimise the potential of radiation beads travelling outside the liver to other tissues, such as bowel or stomach. You will also have a small amount of radioactive spheres injected into the liver arteries, similar to the size of the treatment beads. This is done to see how much blood travels between the liver and lung, which will be measured with a nuclear medicine scan shortly after this first “work up” procedure.
The second part procedure involves an angiogram similar to the first step, then delivering the radiation beads through the arteries of the liver into the tumour. The beads will emit radiation over a very short distance, killing the cancer cells.
https://www.insideradiology.com.au/sirt/
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