Intracranial pulsation detected by ultra-wideband radar: Detectability analysis using synthetic signals

We have already established a combined magnetic resonance (MRI) / ultra-wideband radar (UWB) prototype demonstrating the absence of any mutual interference between both systems, proving the feasibility of the UWB radar method to monitor respiratory and myocardial displacements in a 3 T scanner. In a further study we have shown the feasibility of UWB radar to detect involuntary head motions in the sub-mm range, demonstrating the feasibility of interfacing a MR scanner with an external UWB radar based motion tracking system. It is well known that simultaneous intracranial oscillation also occur, induced by respiration and myocardial contraction. Hence, it is only consequent to ask whether these oscillations are detectable by UWB radar.