While this device might not look like much, it has revolutionized Minimally Invasive Radiology. The blue pointy tip (and the white portion that's behind it) is slid into an artery in the wrist or groin. Through this plastic tube, virtually any artery in the body can be accessed with fine catheters and wires.

Tiny particles, barely big enough to see with the naked eye, are injected inside the blood vessel feeding an organ in the body. The flow of blood is stopped and the organ begins to shrink.