A surgical implant planning computer for intra-operative CT workflow, pre-operative CT imaging workflow, and fluoroscopic imaging workflow. A network interface is connectable to a CT image scanner and a robot surgical platform having a robot base coupled to a robot arm that is movable by motors. A CT image of a bone is received from the CT image scanner and displayed. A user's selection is received of a surgical screw from among a set of defined surgical screws. A graphical screw representing the selected surgical screw is displayed as an overlay on the CT image of the bone. Angular orientation and location of the displayed graphical screw relative to the bone in the CT image is controlled responsive to receipt of user inputs. An indication of the selected surgical screw and an angular orientation and a location of the displayed graphical screw are stored in a surgical plan data structure.