Patent ID: 7421062
Filing Date: 2008-09-02
Classification: A61B,G06T

Abstract:
1. An X-ray CT apparatus comprising: three X-ray generating units arranged so as to make an angle formed by a first X-ray exposure direction and a second X-ray exposure direction on a rotational plane thereof be a same angle as that formed by the second X-ray exposure direction and a third X-ray exposure direction on the rotational plane, the same angle being smaller than 120 degrees; three groups of detecting elements arranged opposite to the three X-ray generating units respectively so as to make a field of view formed in a center wider than two side fields of view; and a reconstructing unit configured to reconstruct an image using detection data detected by at least desired one of the three groups of the detecting elements, wherein the reconstructing unit is configured to switch a first mode for using data from a local region for half reconstruction and a second mode for using data from a region wider than the local region for full reconstruction, the data from the local region being obtained by using the three groups, the data from the region wider than the local region being obtained by using a center one of the three groups.