Computed tomography apparatus and control method for the same

Abstract

A computed tomography apparatus and a method for controlling the same are provided. The apparatus is capable of switching between a high energy mode and a low energy mode at a high speed using a filter that rotates at a high speed. The computed tomography apparatus includes an X-ray generator which generates and irradiates X-rays toward a subject, an X-ray filter which includes at least one filter member, a driver which rotates the X-ray filter such that the filter members are selectively disposed in an irradiation path of X-rays generated by the X-ray generator, a detector which detects the X-rays that are transmitted to the subject, and a host apparatus which obtains X-ray images by using detected X-rays, separates the obtained X-ray images based on filter members to which the corresponding X-rays are transmitted, and reconstructs the images by using X-ray images of the identical filter member.

Description

technical field [0001] Apparatus and methods consistent with the exemplary embodiments relate to a computed tomography apparatus including an X-ray filter for filtering X-rays based on a corresponding energy range and a control method thereof. Background technique [0002] An X-ray imaging apparatus is an apparatus that irradiates X-rays to a subject, analyzes the X-rays passing through the subject, and thereby determines information on the internal structure of the subject. Since the transmittance of X-rays varies based on the tissue constituting the object, the internal structure of the object can be imaged by using an attenuation coefficient obtained by quantifying the transmittance of X-rays. [0003] X-ray imaging equipment can be classified into one of simple X-ray imaging equipment that irradiates X-rays in one direction, and computed tomography (CT) equipment that irradiates X-rays in multiple directions to reproduce images by using a computer. composition image. C...

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Problems solved by technology

[0005] However, when multiple X-ray generators and detectors are used to generate X-rays with different energy levels, since multiple X-ray images can be obtained at the same time, the scattered rays that occur in the body will appear in other X-ray detectors. signals are detected in the

[0006] In addition, such a problem may occur that a separate process for unifying and adjusting properties of a plurality of systems is required, therefore, because when the energy mode is between the high-energy mode and the low-energy mode at high speed in one X-ray generator When switching, the high voltage should be switched in a relatively short time, so it may be difficult to obtain consistent results across energy ranges

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