Patent ID: 9155508
Filing Date: 2015-10-13
Classification: A61B

Abstract:
1. An X-ray CT scanner comprising, multiple X-ray generators, a collimator for restricting an irradiation range of X-rays radiated from the X-ray generators, at least one X-ray detector for detecting the X-rays whose irradiation range is restricted, an auxiliary X-ray detector, a supporter for supporting the X-ray generators and the X-ray detector, a rotation mechanism for rotating the supporter about a rotation axis, a shifting mechanism for shifting in a direction of the rotation axis, a position of at least one X-ray generator out of the multiple X-ray generators, with respect to the supporter, and a signal processor for applying signal processing on a signal detected by the X-ray detector, wherein the shifting mechanism is adapted to change a position of the X-ray generator to a selected one of a multiple preset positions, and wherein the auxiliary X-ray detector is adapted to detect the X-rays radiated from the X-ray generator in proximity to the selected preset position, whereby an amount of displacement from the selected preset position of the X-ray generator is calculated based on a detection signal of the auxiliary X-ray detector, and wherein the position of the X-ray generator is modified based on the amount of displacement.