Abstract: Provided is a computed tomography (CT) imaging apparatus, the CT imaging apparatus including a data obtainer configured to obtain first raw data from X-ray transmitted by an object; and a processor configured to interpolate a pixel value corresponding to a to-be-restored region within raw data, based on a pixel value of at least one line that penetrates through the to-be-restored region.

Abstract: An apparatus for driving an optical-reflector for optical image stabilization (OIS) with a multi-axial structure includes a support frame having a first groove rail formed therein, an optical-reflector disposed on the support frame to reflect light to a lens, a middle frame having a first guide rail corresponding to the first groove rail and a second groove rail formed therein, a base frame having a second guide rail formed corresponding to the second groove rail, a first ball disposed between the first groove rail and the first guide rail, a second ball disposed between the second groove rail and the second guide rail, a first driving unit configured to move the support frame in a first direction on the basis of the middle frame, and a second driving unit configured to move the middle frame in a second direction, different from the first direction, on the basis of the base frame.

Abstract: A tomography apparatus that may reduce partial scan artifacts includes: a data acquirer configured to acquire tomography data when X-rays are emitted as a cone beam to an object while rotating by one cycle angular section that is less than one rotation; and an image reconstructor configured to reconstruct a tomography image by using corrected tomography data that is obtained by applying to the tomography data a weight that is set based on at least one of a view that is included in the one cycle angular section and a cone angle in the cone beam.

Abstract: A method for designing a centrifugal pump and a mixed flow pump having a specific speed of 150-1200 comprises a design specification determination step for a turbo pump including an impeller, a specific speed determination step for the impeller, a design variable determination step for the impeller, and a three dimensional shape deriving step for the impeller. According to the present invention, the three dimensional shape of the impeller can be simply designed by converting the design variables related to the specific speed into a function and by putting optimized design variables into a database.

Abstract: A method of acquiring a tomography image includes acquiring a plurality of raw data by detecting an X-ray irradiated to an object from an X-ray generator a plurality of times, wherein an X-ray detector performs the detecting; setting at least a part of the object as a region of interest; and reconstructing the tomography image including the region of interest, based on the plurality of raw data, wherein the reconstructing of the tomography image includes: selecting filter kernels based on distances between positions of the X-ray generator that irradiated the X-ray to the region of interest and positions of voxels included in the region of interest; generating filter images by applying the selected filter kernels to the raw data corresponding to the positions of the X-ray generator that irradiated the X-ray; and reconstructing the tomography image from the filter images by back-projecting the filter images.

Abstract: A method and apparatus correct a computed tomography (CT) image with motion artifacts. The method of correcting a CT image may include: obtaining a reconstruction image of an object by reconstructing an X-ray projection image; measuring a parameter value related to motion artifacts that occur due to movement of the object in at least one of the X-ray projection image or the reconstruction image; calculating a correction possibility for the reconstruction image based on the measured parameter value; and determining whether to perform correction on the reconstruction image based on the calculated correction possibility.

Abstract: An apparatus for driving an optical system with a memory unit includes a main frame having an optical system; a base frame configured to accommodate the main frame; a driving unit configured to move the main frame in a first direction perpendicular to an optical axis with respect to the base frame; and a memory unit configured to store first reference position information that is information about a position at which the optical system is aligned in the first direction.

Abstract: Provided is a tomography apparatus including: a data acquisitor configured to obtain a first image by using tomography data acquired as a first X-ray generator for generating X-rays having a first energy rotates around an object over a first angular range and obtain a second image by using tomography data acquired as a second X-ray generator for generating X-rays having a second energy rotates around the object over a second angular range; a controller configured to acquire motion information representing an amount of motion of the object over time by using the first and second images; and an image reconstructor configured to reconstruct a target image showing the object at a target time point by using the motion information.

Abstract: Disclosed is a multi-volute sirocco fan (multiblade fan). The present invention relates to a multi-volute sirocco fan configured to discharge fluid into several directions while using one motor and one fan. The sirocco fan according to the present invention comprises: a driving motor; a fan connected to a rotation shaft of the driving motor to thus be rotated therewith, the fan having a plurality of vanes arranged and installed in a cylindrical shape along the circumferential direction thereof; and at least two stacked volutes in the center of which the fan is arranged and installed and which guide the fluid while the cross-sectional area formed by the upper and lower surfaces, side surfaces thereof and the outer circumferential surface of the fan is linearly increased.

Abstract: A tomography apparatus includes a data obtainer and an image processor. The data obtainer performs a tomography scan on a moving object and obtains raw data of the object The image processor reconstructs a first tomography image of the object for a first slice section in a first phase from the raw data and reconstructs a second tomography image in a second phase, which is different from the first phase, for the first slice section of the object by using the raw data. The image processor also generates motion information indicating a three-dimensional (3D) motion of the object. The second phase is a phase beyond a phase range of the raw data.

Abstract: A tomography apparatus includes a data obtainer configured to obtain first image data at a first point and second image data at a second point using tomography, the tomography being performed by irradiating an X-ray to an object; an image processor configured to perform noise reduction based on at least one from among the first image data and the second image data, and to obtain a first reference image corresponding to the first image data and a second reference image corresponding to the second image data using a result of the performed noise reduction; and an image reconstructor configured to reconstruct a target image representing the object based on the first reference image and the second reference image.

Abstract: An apparatus for driving an optical-reflector for optical image stabilization (OIS) with a multi-axial structure includes a support frame having a first groove rail formed therein, an optical-reflector disposed on the support frame to reflect light to a lens, a middle frame having a first guide rail corresponding to the first groove rail and a second groove rail formed therein, a base frame having a second guide rail formed corresponding to the second groove rail, a first ball disposed between the first groove rail and the first guide rail, a second ball disposed between the second groove rail and the second guide rail, a first driving unit configured to move the support frame in a first direction on the basis of the middle frame, and a second driving unit configured to move the middle frame in a second direction, different from the first direction, on the basis of the base frame.

Abstract: A tomography apparatus and a method of processing a tomography image are provided. The tomography apparatus includes a data acquirer configured to acquire a first image corresponding to a first time point and a second image corresponding to a second time point, based on data that is obtained from performing tomography on a moving object, acquire first information indicating a movement of the object between the first time point and the second time point, and determine a motion reliability indicating a degree to which the movement of the object corresponds to a physical movement, based on the first information. The tomography apparatus further includes an image reconstructor configured to reconstruct a target image indicating the object at a target time point, based on the motion reliability.

Abstract: A computed tomography (CT) apparatus includes a data acquirer configured to acquire a first image corresponding to a first time point, a second image corresponding to a second time point, and a third image corresponding to a third time point based on a result of a CT scan on an object; an image reconstructor configured to acquire motion information of the object based on an amount of movement of the object between the first and second images and an amount of movement of the object between the first and third images, and obtain a target image by correcting at least one of the first, second and third images based on the motion information; and a display configured to display the target image.

Abstract: A tomography apparatus includes a data acquirer configured to acquire partial images of an object including a first image and a second image having imaged a surface of a portion of the object corresponding to a first time and a second time, respectively, by performing a tomography scan on the object that is moving, and acquire first information indicating motion of the object by using the first image and the second image; and an image reconstructor configured to reconstruct a target image by using the first information.

Abstract: A diagnostic imaging apparatus includes an image acquiring unit acquiring a first image obtained by imaging an object in a first section of a first cycle and a second image obtained by imaging the object in a second section, which corresponds to the first section, of a second cycle, and an image reconstruction unit reconstructing the first image and the second image based on a difference between the first image and the second image.

Abstract: Provided are a tomography imaging apparatus and a method of reconstructing a tomography image which may more accurately measure a motion of an object to be tomography-imaged. In detail, the tomography imaging apparatus and the method of reconstructing a tomography image may obtain information indicating a motion of a moving object according to a time, may perform motion correction based on the obtained motion information, and may reconstruct a target image with reduced motion artifacts.

Abstract: Provided is a computed tomography (CT) imaging apparatus, the CT imaging apparatus including a data obtainer configured to obtain first raw data from X-ray transmitted by an object; and a processor configured to interpolate a pixel value corresponding to a to-be-restored region within raw data, based on a pixel value of at least one line that penetrates through the to-be-restored region.

Abstract: A method and device for securing data of a message is provided. A method for encrypting a message of a user terminal device includes: receiving a message via a message input window; displaying the received message; encrypting the message by using a key index and an encryption key corresponding to a chatting window for the message based on an instruction for transmitting the message to another chatting party being received; and transmitting the encrypted message to the other chatting party.

Abstract: A medical imaging apparatus and a medical image processing method are provided. The medical imaging apparatus includes a data obtainer configured to obtain raw data by performing a tomography scan on an object. The medical imaging apparatus also includes a processor configured to obtain first data and second data from raw data and extract motion information based on the first data and the second data. An output interface is configured to provide the extracted motion information.