Radiation imaging apparatus and control method thereof

Abstract

A radiation imaging apparatus has a camera installed on a gantry, and a method creates volume data of a subject through images of the subject photographed by the camera and calculates an optimum dose of radiation based on the volume data of the subject. The radiation imaging apparatus includes the gantry, and the camera installed on the gantry to photograph a subject.

What is claimed is: 
     
         1 . A radiation imaging apparatus comprising:
 a gantry;   a camera configured to photograph a subject;   a radiation emitter;   a display; and   a controller for controlling the camera to photograph the subject at multiple angles, to create volume data from images of the subject acquired by the camera, to calculate an dose of radiation that is to be irradiated to a scan zone of the subject based on the volume data of the subject, to control the radiation emitter to scanning the subject with the calculated dose of radiation, to generate a scanned image of the subject, and to control the display to display the scanned image of the subject.   
     
     
         2 . The radiation imaging apparatus according to  claim 1 , wherein the camera is installed on the gantry, and wherein the controller is configured to rotate the gantry, and to drive the camera to photograph the subject while the gantry rotates. 
     
     
         3 . The radiation imaging apparatus according to  claim 2 , wherein the controller controls driving of the camera to photograph the subject at predetermined regular time intervals while the gantry rotates. 
     
     
         4 . The radiation imaging apparatus according to  claim 2 , wherein the controller controls driving of the camera to photograph the subject at predetermined regular angles while the gantry rotates. 
     
     
         5 . The radiation imaging apparatus according to  claim 2 , wherein the controller creates volume data of the subject from photographed images of the subject acquired from the camera while the gantry rotates. 
     
     
         6 . The radiation imaging apparatus according to  claim 5 , wherein the controller calculates the dose of radiation based on volume data of a scan zone of the subject. 
     
     
         7 . The radiation imaging apparatus according to  claim 5 , wherein the controller divides a volume of the subject into a plurality of volumes in a direction perpendicular to a driving axis of the gantry, obtains a center line of each divided volume, and adjusts a position of the center line of each divided volume including a scan zone of the subject such that the center line of each divided volume matches the driving axis of the gantry. 
     
     
         8 . The radiation imaging apparatus according to  claim 7 , wherein the controller obtains the center line of each divided volume by connecting center points of slices constituting each divided volume to each other. 
     
     
         9 . The radiation imaging apparatus according to  claim 7 , further comprising a tiltable cradle upon which the subject is disposed, wherein the controller adjusts tilting of the cradle such that the center line of each divided volume including the scan zone of the subject matches the driving axis of the gantry. 
     
     
         10 . The radiation imaging apparatus according to  claim 1 , wherein the camera includes a plurality of cameras are installed on the gantry at predetermined regular distance intervals.