Patent ID: 6067341
Filing Date: 2000-05-23
Classification: A61B,Y10S

Abstract:
An x-ray computed tomography method in which x-rays emitted from an x-ray source impinges upon a subject placed within a measured volume and the transmitted x-rays are detected by an array of x-ray detector elements, the method comprising the steps of:prior to the tomographic imaging of the subject, producing scout images by fixing the angular position of the x-ray source at two different angular positions and performing the scout imaging of the subject respectively at the angular positions;calculating a scanning condition with reference to the standard deviation of image data based on the area of projection display data, a desired standard deviation of the image data and the pixel value attenuation ratio between the scout images acquired respectively at the two angular positions of the x-ray source; andperforming the tomographic imaging of the subject according to the scanning condition.