A biopsy is a procedure that involves the removal of a small piece of tissue from the body in order for it to be examed for signs of abnormalities such as cancer or other conditions like infections and autoimmune disorders.
Interventional radiology uses different imaging techniques, such as ultrasound, CT, or MRI to guide the physician as he places a needle through the skin (percutaneously) to the area of abnormality in order to remove a small tissue sample.
Each type of interventional radiology procedure follows a different process and you may be required to follow specific instructions before the procedure begins.
Interventional radiology procedures can carry certain risks such as infection, bleeding, and tissue damage. However, because of the use of imaging guidance to help determine exactly where to place the needle and perform the biopsy, the risks are generally lower than undergoing the same procedure performed without the help of imaging.