A novel 3D-reconstruction approach from biplane angiographic images

The authors elaborate a 3D reconstruction method, using angiograms acquired daily by the clinician, without any special calibration procedure during the X-ray examination. The absolute geometry of the X-ray imaging system is determined by an iterative procedure based on the minimization of the mean squared distances between observed and predicted projections of a set of reference points (⩾12) identified by the clinician on a simultaneous pair of images. Once the geometry of the imaging system has been found, the 3D structure of interest is retrieved from classical methods of binocular stereovision. The method should be particularly useful in clinical applications since it needs very little intervention from the clinician