A system and method to perform image acquisition of a subject is provided. The system includes a mobile device to move an imaging system across a floor, and a brake system that restrains movement of the mobile device. A controller includes a memory having program instructions to instruct a processor to perform the steps of: instructing movement of the mobile device in support of the imaging system to a first position for image acquisition of the subject； receiving feedback that the mobile device is located at the first position； and applying a brake force to restrain movement of the mobile device. The step of applying the brake force includes generating a vacuum in restraint of movement of the mobile device with respect to the floor.
