X-ray CT apparatus
First Claim
1. An X-ray CT apparatus for picking up sectional images of an object by irradiating the object with a conical X-ray beam from around a body axis of the object and detecting X rays transmitted through the object, said apparatus comprising:
- X-ray image pickup means including an X-ray tube for emitting the conical X-ray beam to said object placed on a top board, and a flat panel X-ray sensor with X-ray detecting elements arranged in a matrix form for detecting transmitted X rays;
drive means for driving the X-ray image pickup means about the body axis of said object;
image reconstruct means for reconstructing a sectional images of a designated section based on transmitted X-ray detection data outputted from said flat panel X-ray sensor of the X-ray image pickup means driven in a fluoroscopic imaging mode;
image display means for displaying X-ray images;
fluoroscopic imaging means for acquiring a fluoroscopic image based on the transmitted X-ray detection data outputted from said flat panel X-ray sensor of the X-ray image pickup means driven in the fluoroscopic imaging mode, and displaying said fluoroscopic image on said image display means; and
reconstruct area superimposing means for displaying a reconstruct area for CT imaging as superimposed on said fluoroscopic image acquired by said fluoroscopic imaging means.
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Abstract
An X-ray CT apparatus for reconstructing images based on transmitted X-ray detection data acquired by emitting a conical X-ray beam from around an object and outputted from a flat panel X-ray sensor. In advance of CT imaging, a reconstruct area for CT imaging is displayed on a display monitor as superimposed on a fluoroscopic image acquired by irradiating the object with X rays emitted from a selected direction around the object. The operator can determine, before executing the CT imaging, whether a site of interest to be imaged is within the reconstruct area, thereby reliably acquiring CT images of desired sections.
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Citations
9 Claims
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1. An X-ray CT apparatus for picking up sectional images of an object by irradiating the object with a conical X-ray beam from around a body axis of the object and detecting X rays transmitted through the object, said apparatus comprising:
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X-ray image pickup means including an X-ray tube for emitting the conical X-ray beam to said object placed on a top board, and a flat panel X-ray sensor with X-ray detecting elements arranged in a matrix form for detecting transmitted X rays;
drive means for driving the X-ray image pickup means about the body axis of said object;
image reconstruct means for reconstructing a sectional images of a designated section based on transmitted X-ray detection data outputted from said flat panel X-ray sensor of the X-ray image pickup means driven in a fluoroscopic imaging mode;
image display means for displaying X-ray images;
fluoroscopic imaging means for acquiring a fluoroscopic image based on the transmitted X-ray detection data outputted from said flat panel X-ray sensor of the X-ray image pickup means driven in the fluoroscopic imaging mode, and displaying said fluoroscopic image on said image display means; and
reconstruct area superimposing means for displaying a reconstruct area for CT imaging as superimposed on said fluoroscopic image acquired by said fluoroscopic imaging means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification