1. A method to contactlessly determine whether a movable door in a motor vehicle is at risk of contacting an avoidable object during door movement, the method comprising the following steps: (a) for each said door, disposing at least one time-of-flight (TOF) system with a field of view (FOV) adequately wide to acquire in real-time at least one depth image of at least a portion of a three-dimensional contact zone within which an avoidable object, if present, would be contacted by at least part of said door when said door is moving, an avoidable object being an object excluding said door and a vehicle door frame associated with said door; (b) providing said TOF system with a software executable algorithm that uses said depth image acquired at step (a) to determine whether at least a portion of an avoidable object is present within a portion of said contact zone when said door is moving such that door-avoidable object contact may occur unless prevented; and (c) generating a control signal if step (b) determines presence of at least a portion of said avoidable object within a portion of said contact zone, said control signal coupleable to a mechanism to facilitate at least one of (i) retarding present motion of said door, (ii) reversing direction of present motion of said door, and (iii) halting motion of said door; whereby likelihood of damage resulting from contact between said avoidable object and said door is reduced, while ignoring other objects within said FOV.