Patent ID: 8538505
Filing Date: 2013-09-17
Classification: A61B

Abstract:
1. A method for collecting a three-dimensional data of an object to be examined from a series of projection images of the object recorded by a biplane C-arm system having two separate C-arm planes, comprising: recording a cardiac activity of the object by an ECG; determining a cardiac frequency and a start cardiac phase; calculating parameters of the two C-arm planes from the cardiac frequency and the start cardiac phase; setting the C-arm planes with the parameters; acquiring data in the start cardiac phase after setting of the parameters; uniformly rotating the two C-arm planes at a speed in a forward motion over an angular area; acquiring data at different angles in the angular area in different cardiac phases during rotating in the forward motion; acquiring data in the start cardiac phase after terminating the forward motion; uniformly rotating the two C-arm planes at the speed in a backward motion over the angular area; acquiring data at the different angles in the angular area in the different cardiac phases during rotating in the backward motion; and reconstructing all of the acquired data for collecting the three-dimensional data of the object after terminating the backward motion upon completed acquisition, wherein the two separate C-arm planes are spaced by a fixed intermediate angle between each other.