Patent Document ID: 9775582
Application ID: 14729566
Patent Status: 1

Claim One:
1. A medical image photographing apparatus comprising: an X-ray generator configured to irradiate an X-ray toward an object that is located in a three-dimensional (3D) virtual grid space which includes a plurality of voxels; an X-ray detector comprising a plurality of detecting elements and configured to detect the X-ray that has propagated through the object; and an image processor configured to process projection image data corresponding to the detected X-ray based on a volume of a predefined first region within the plurality of voxels, through which the X-ray has propagated, wherein the medical image photographing apparatus further comprises one from among a computed tomography (CT) apparatus, a C-arm medical image photographing apparatus, and a Positron Emission Tomography (PET)/CT apparatus, and wherein the X-ray generator is further configured to irradiate the X-ray in a form of a cone-beam or a fan-beam, and wherein the image processor is further configured to set a slice in the 3D virtual grid space and to acquire, as the first region, a region of an overlap between the slice and a first polyhedron formed by connecting a point from which the X-ray generator irradiates the X-ray to each of a plurality of vertices lying on a face of one of the plurality of detecting elements, the face being directed toward the X-ray generator.