Abstract:
Disclosed are an image reconstruction method and a radiation imaging apparatus using the same. The radiation imaging apparatus includes a radiation emitter which emits multiple energy spectra of radiation toward an object, a radiation detector which detects multiple energy spectra of radiation passing through the object and thereby outputs measurement data, and an image reconstructor which reconstructs a radiation image of the object, based on the measurement data output by the radiation detector. The method may be used to calculate simulation data of an inner structure of the object using an image reconstruction value including information associated with densities of substances of the inside of the object, to acquire a correction value of the image reconstruction value minimizing a discrepancy between the measurement data and the simulation data and to update the image reconstruction value using the correction value.
Abstract:
An apparatus and method for providing a 3D stereoscopic image is provided. The apparatus may provide a 3D stereoscopic image generated based on two projection images imaged at different positions.
Abstract:
The present disclosure provides an X-ray imaging apparatus and control method thereof, for guiding the user to intuitively recognize an actual dose of X-rays and select a proper dose, ultimately a condition for low dose of X-ray irradiation by providing the user with information about an actual X-ray dose to which an X-ray filter effect is reflected. In accordance with an aspect of the disclosure, an X-ray imaging apparatus includes: an X-ray source configured to generate and irradiate X-rays according to an X-ray irradiation condition including at least one of a tube voltage, a tube current, or a filter; a display configured to provide a graphic user interface to receive a choice about the X-ray irradiation condition; and a controller configured to obtain a parameter that represents a dose of radiation, to which an influence of the filter is reflected, based on the selected X-ray irradiation condition and control the display to display the parameter.
Abstract:
Disclosed herein are an X-ray imaging apparatus for optimizing radiography conditions upon radiography, and a control method thereof. The X-ray imaging apparatus includes: an input device configured to receive information about a patient; and a controller configured to conduct a search for a previously obtained X-ray image related to the information about the patient and a previously set radiography condition related to the information about the patient, and to set a radiography condition for a main-shot based on a result of the search.
Abstract:
An X-ray imaging apparatus includes an X-ray emitter that emits X-rays to an object at a plurality of positions; a detector that detects X-rays having passed through the object and converts the detected X-rays into electric signals; and an image processor that is configured to generate X-ray images at the plurality of positions by reading out the electric signals, acquire volume data of the object using the X-ray images, and reproject the acquired volume data by using different bands of energy spectrums to acquire reconstructed reprojection images of different energy bands.
Abstract:
Provided is a method and apparatus for providing a three-dimensional (3D) image. A plurality of first projection images may be created by detecting X-rays which are emitted toward an object at different angles. A plurality of second projection images with respect to a partial volume of the object may be created by applying a forward projection and interpolation to at least one of the plurality of first projection images. A left image and a right image may be selected from among the plurality of second projection images, and the selected left image and right image may be displayed for a user as a 3D projection image.
Abstract:
An X-ray imaging apparatus includes an X-ray generator configured to transmit X-rays to an object, an X-ray detector configured to detect the X-rays transmitted through the object and convert the detected X-rays into electrical signals, a gantry in which the X-ray generator and the X-ray detector are installed so as to be opposite to each other, the gantry being rotatable about a bore, a controller configured to control a rotation of the gantry during bio-signal cycles of the object so that the gantry is rotated from different start positions whenever one of the bio-signal cycles is started, and an image processor configured to generate a 4D image of the object by applying a prior image-based compressed sensing image reconstruction algorithm to plural 2D projection images acquired from the electrical signals generated by converting the X-rays detected during the rotation of the gantry.
Abstract:
Disclosed herein are an X-ray imaging apparatus capable of reducing a dose of radiation, and a control method thereof. The X-ray imaging apparatus includes: a gantry configured to rotate around an object, the object being placed on a table that is configured to be transported into a bore; a depth camera provided on the gantry, the depth camera configured to acquire a depth image of the object; an image processor configured to acquire thickness information of the object from the depth image of the object; and a controller configured to set a dose of X-rays to be irradiated to the object according to the thickness information of the object.
Abstract:
An X-ray imaging method and apparatus are provided for forming an X-ray image having reduced noise and showing a clear boundary of a lesion region. The X-ray imaging method includes performing a first main shot which irradiates an object in a compressed state by using X-rays at least once to obtain a single two-dimensional image, performing a second main shot which irradiates the object by using X-rays at different positions to obtain a plurality of two-dimensional images, and forming a two-dimensional final image by removing a lesion region having a unclear boundary from each of the plurality of two-dimensional images and substituting a lesion region of the single two-dimensional image into an area which corresponds to the removed lesion region.
Abstract:
An imaging method includes calculating a derivative back projection (DBP) result value using a DBP method with respect to a projection image of a field of view (FOV) inside an object, and reconstructing an image of the FOV by applying a regulation function to the FOV while reconstructing the image of the FOV using the DBP result value.