Systems, methods, and related computer program products for image-guided radiation treatment are described. Each column has internal wall portions which define at least one channel therein extending parallel to its vertical axis, an outer channel portion opening to its exterior surface, and an inner channel portion extending inwardly. The two light beams from the device are incident on a second polarizing beamsplitter which recombines the incident beams into two composite beams one of which represents light rotated by the \u201con\u201d pixels of the device, and this combined beam is refocused onto the object. The user console session extracts these window and encodes them with a remote presentation protocol, then transmits the encoded window to the destination computer, such that the encoded windows are not transferred through a second user session of the source computer before being transferred to the destination computer.