Therasphere Shunt Study
What is a Therasphere Shunt Study?
A therasphere shunt study is to evaluate extrahepatic shunting for patients who are to undergo therasphere treatment.
How should I prepare for a Therasphere Shunt Study?
There is no prep for this test. The injection for this test is performed in Interventional Radiology so you should follow all restriction provided to you by the Interventional Radiology Department.
How long does the test take?
This study will begin in the Interventional Radiology Department. There the doctor will place a catheter into your hepatic artery which is in your liver. After this is placed a nuclear medicine technologist will inject through the catheter a small amount of a radioactive isotope. There are no side effects to this injection. You will then be transported to the Nuclear Medicine Department where we will take a 2 minute image of your lungs, a 2 minute image of your liver, and then a SPECT/CT of your liver which takes about 15 minutes. A SPECT/CT is a tomographic set of images combined with a non-diagnostic CT for attenuation correction. The technologist will process the images to determine if there is any shunting from your liver to your lungs. This will assist in determining the prescribed dose of yttrium 90 for the Therasphere treatment.
How soon will the scan results be available?
A radiologist will interpret the images, write a report, and deliver the results to your doctor via the internal computer system. This process usually takes less than 24 hours
It is essential to tell your doctor if you are pregnant or think you might be pregnant before undergoing this scan because of radiation exposure.