An applicator for delivering any of a plurality of predetermined radiation fields to a target in intraoperative radiotherapy is presented. The applicator includes a panel a, a first pair of first and second grippers, two end units disposed on opposite ends of the panel, and a second pair of grippers. The first pair of first and second grippers is pivotally connected to the panel, each gripper having a loop on an end configured to receive a catheter, the loop connected to an arm and the arm pivotally attached to the panel. The first and second grippers are configured to rotate in opposite directions to form an open position and come to a stopping point. The loops of the grippers are configured to slide under one another while rotating into a retracted configuration. The two end units are disposed on opposite ends of the panel, and configured for being grasped by two independent graspers for fixing the applicator in position. The second pair of grippers is pivotally connected to an opposite side of the panel relative to the first pair of grippers, each gripper having a loop on an end, the loop connected to an arm and the arm pivotally attached to the panel. The first and second grippers of the second pair are configured to rotate in opposite directions from an open position and come to a stopping point. The loops of the grippers are configured to slide under one another when in a retracted configuration.
