Continous 3D imaging (as in CT flouroscopy) would be very useful for radiological intervention guidance. The position of intervention instruments could be asessed in space in their relationship to the surrounding structures. Currently, only 2D X-ray flouroscopy or manipulate-and-shoot-CT-techniques are available. Continous CT imaging with standard reconstruction algorithms do exceed radiation dose levels and does not play a significant role in clinical medicine. Compresses sensing based CT reconstruction together with prior knowledge could reduce the amount of necessary radiation dose. We would like to test this using a flat-panel-based Volume-CT scanner. Does anybody has enough experiences in the field of compressed sensing reconstruction?