Ultrasound Preparation Guide #2 - Veterans Affairs

The "liver tumors" needed to contrast with the "liver tissue" for them to be imageable using CT and Ultrasound and to mimic the properties of actual tumors. In order to insure the tumors were visible in a CT image, a small amount of barium powder was added to the same 1:1 silicone mixture that was used for the "liver tissue". ................
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