What is an interventional radiologist? An interventional radiologist is a radiologist by training: i.e. someone who’s trained to interpret images but further to that uses those images to undertake treatments, usually minimally invasive treatments, carried out by guiding special small instruments through tiny holes with the use of imaging equipment. In this case, most of the venous treatments are done using ultrasounds scanners. We do a few treatments using movie x-rays for guidance. Interventional radiologists are those specialists that have got the natural skills developed over a number of years of guiding catheters and other little instruments using ultrasound and other imaging guidance.