A device for providing a non-contact, time-resolved three-dimensional scan of at least one structural element of a living object which uses microwaves, that comprises besides at least one antenna element, at least one transmitter and at least one receiver, at least one comparator for comparing emitted microwaves and microwaves which are reflected off and at least one analyzer for analyzing at least one property of the emitted microwaves and the received microwaves out of the group of time, frequency, phase, polarization and amplitude.Further the device comprises at least one control and/or processing unit designed for repetitively sampling two-dimensional images in which each pixel contains information about the precise distance and/or velocity of said structural elements towards the antenna elements.The invention allows a repeated spatial reconstruction of the structural element in a living object.
