The simple positioner is a fixture that makes the task of loading, positioning, and pre-crimping marker-bands repeatable and easy. It consists of a band pusher/crimper and a rail that stops the band pusher in the desired position. Band stops are set with a caliper then locked into place with a setscrew. First the user loads the bands on to the catheter, with a built-in tray and groove that simplifies the loading task. Then the bands are pushed into location using the band pusher/crimper. Once the band is in position, a press of the button crimps the band into a triangular shape that locks it in place. Band stops flip out of the way to allow easy positioning and close band to band spacing.