Patent ID: 7359479
Filing Date: 2008-04-15
Classification: A61B

Abstract:
1. A radiographic apparatus for obtaining three-dimensional sectional images, comprising: a radiation source for emitting electromagnetic waves to an object under examination; a detecting device opposed to said radiation source across the object for obtaining projection data of the object from the electromagnetic waves transmitted through the object; a primary scanning device for performing a primary scanning by moving at least said radiation source to rotate a radiation axis linking said radiation source and said detecting device about a sectional axis passing through a site of interest of the object, while inclining said radiation axis at a predetermined angle to said sectional axis; and an image processing device for performing a reconstruction process based on a group of projection data obtained from said detecting device at each point of time in the primary scanning to acquire a three-dimensional sectional image; wherein said detecting device has a flat or curved detecting plane with a plurality of detecting elements arranged in rows and columns extending in two intersecting axial directions for detecting the electromagnetic waves, the rows or columns of said detecting elements being, in time of the primary scanning, constantly parallel to one axis extending perpendicular to said sectional axis and passing through said site of interest of the object.