Abstract: A calculation method for a dual-energy X-ray imaging system is provided. The calculation method for the dual-energy X-ray imaging system includes the following steps. A plurality of material attenuation coefficient ratio of the dual-energy projection image are established according to the reference materials with known material characteristics. The effective atomic number of each reference material and the material attenuation coefficient ratio are used to establish a calibration data set. A rational polynomial approximation method is adopted to obtain the characteristic model related to the material attenuation coefficient ratio of the reference material and the effective atomic number of the reference material. The material attenuation coefficient ratio of the dual-energy projection image of unknown material is established.

Abstract: A calculation method for a dual-energy X-ray imaging system is provided. The calculation method for the dual-energy X-ray imaging system includes the following steps. A plurality of material attenuation coefficient ratio of the dual-energy projection image are established according to the reference materials with known material characteristics. The effective atomic number of each reference material and the material attenuation coefficient ratio are used to establish a calibration data set. A rational polynomial approximation method is adopted to obtain the characteristic model related to the material attenuation coefficient ratio of the reference material and the effective atomic number of the reference material. The material attenuation coefficient ratio of the dual-energy projection image of unknown material is established.

Abstract: A geometric calibration method for dual-axis digital tomosynthesis includes the steps of: providing a calibration phantom having a first plate, a second plate parallel to the first plate, and mark points distributed to the first and second plates; arranging any mark point at the first plate not to be vertically collinear with a mark point at the second plate; projecting the calibration phantom onto a planar detector to obtain a projected calibration-phantom image; deriving a conversion relationship between the mark point and the corresponding projected position at the planar detector to further establish a projection matrix related to an imaging system; and, applying the projection matrix to calculate a plurality of geometric parameters. In addition, a geometric calibration system for dual-axis digital tomosynthesis is also provided.

Abstract: A scanning system includes a first base, a bed panel, a bed board, a second base and an X-ray mechanism. The bed panel, movably located on the first base, includes a first image-receiving module. The bed board is movably located on the bed panel. The second base, located aside to the first base, includes a second image-receiving module. The X-ray mechanism, connected with the first base, includes an X-ray tube. While the bed panel and the bed board are moved away from the second base, and the X-ray mechanism is moved toward the second base; then, the X-ray tube would undergo a vertical movement to a position aside to a lateral side of the first base by facing the second base.

Abstract: The invention provides an automatic exposure control method for a digital X-ray imaging device. The automatic exposure control method for a digital X-ray imaging device includes the following the steps. First, a parameter database is provided before imaging scan. A depth information is generated, wherein the depth information by a depth sensor detect the thickness of a region of interest of an object. Imaging exposure parameters, mAs and kV, are estimated according to the depth information and the parameter database. Then, X-ray imaging is performed according to the imaging exposure parameters estimated by the method described in this application. In addition, an automatic exposure control system for a digital X-ray imaging device is also provided.

Abstract: A scanning system includes a first base, a bed panel, a bed board, a second base and an X-ray mechanism. The bed panel, movably located on the first base, includes a first image-receiving module. The bed board is movably located on the bed panel. The second base, located aside to the first base, includes a second image-receiving module. The X-ray mechanism, connected with the first base, includes an X-ray tube. While the bed panel and the bed board are moved away from the second base, and the X-ray mechanism is moved toward the second base; then, the X-ray tube would undergo a vertical movement to a position aside to a lateral side of the first base by facing the second base.

Abstract: The invention provides a loading mechanism for x-ray tube. The loading mechanism for x-ray tube includes an x-ray tube, a swing element and a rotating element. The x-ray tube includes a focal spot location and an x-ray opening. The swing element includes a first rotating axis, and the first rotating axis passes through the focal spot location. The swing element rotates about the first axis to rotate the x-ray tube within a limit swing range. The rotating element is connected to the swing element. The rotating element has a second rotating axis, and the first rotating axis perpendicular to the second rotating axis. The rotating element rotates about the second rotating axis to drive rotate the x-ray tube and the swing element. In addition, the scanning system for three-dimensional image is provided.

Abstract: The invention provides an automatic exposure control method for a digital X-ray imaging device. The automatic exposure control method for a digital X-ray imaging device includes the following the steps. First, a parameter database is provided before imaging scan. A depth information is generated, wherein the depth information by a depth sensor detect the thickness of a region of interest of an object. Imaging exposure parameters, mAs and kV, are estimated according to the depth information and the parameter database. Then, X-ray imaging is performed according to the imaging exposure parameters estimated by the method described in this application. In addition, an automatic exposure control system for a digital X-ray imaging device is also provided.

Abstract: A scanning system for three-dimensional imaging comprises a bench, a gantry frame, a light source, a sensor and a control unit. The bench is to support a subject to be scanned. The gantry frame is movably mounted at a lateral side of the bench. The light source is movably mounted on the gantry frame so as to emit a light for a radiographic purpose. The sensor is movably mounted at a side of the bench, by opposing to the subject with respect to the bench, so as to receive the light emitted from the light source. The control unit is electrically coupled with the gantry frame, the light source and the sensor so as thereby to perform motion controls upon the gantry frame, the light source and the sensor.

Abstract: The invention provides a loading mechanism for x-ray tube. The loading mechanism for x-ray tube includes an x-ray tube, a swing element and a rotating element. The x-ray tube includes a focal spot location and an x-ray opening. The swing element includes a first rotating axis, and the first rotating axis passes through the focal spot location. The swing element rotates about the first axis to rotate the x-ray tube within a limit swing range. The rotating element is connected to the swing element. The rotating element has a second rotating axis, and the first rotating axis perpendicular to the second rotating axis. The rotating element rotates about the second rotating axis to drive rotate the x-ray tube and the swing element. In addition, the scanning system for three-dimensional image is provided.

Abstract: The invention relates to a method for radiation detection signal processing, and more particularly to a method capable of using a periodic signal to control the time of charging/discharging to a capacitor of an integrator. The method can be used for detecting the energy of incident photon of Gamma ray during the happening of an event while reducing dead time, and thereby, the count rate is increased. As the periodic signal is used as the signal for controlling the time of charging/discharging to a capacitor, the charging/discharging time of the integrator is no longer being controlled by the triggering time of the event, and thus, the present method is advantageous in that: the control method and circuit architecture are comparatively simpler since the charging/discharging time of the integrator no longer required to be controlled precisely, and thus the integration error due to insufficient resolution in delay element can be avoided.

Abstract: A scanning system for three-dimensional imaging comprises a bench, a gantry frame, a light source, a sensor and a control unit. The bench is to support a subject to be scanned. The gantry frame is movably mounted at a lateral side of the bench. The light source is movably mounted on the gantry frame so as to emit a light for a radiographic purpose. The sensor is movably mounted at a side of the bench, by opposing to the subject with respect to the bench, so as to receive the light emitted from the light source. The control unit is electrically coupled with the gantry frame, the light source and the sensor so as thereby to perform motion controls upon the gantry frame, the light source and the sensor.

Abstract: The invention relates to a method for radiation detection signal processing, and more particularly to a method capable of using a periodic signal to control the time of charging/discharging to a capacitor of an integrator. The method can be used for detecting the energy of incident photon of Gamma ray during the happening of an event while reducing dead time, and thereby, the count rate is increased. As the periodic signal is used as the signal for controlling the time of charging/discharging to a capacitor, the charging/discharging time of the integrator is no longer being controlled by the triggering time of the event, and thus, the present method is advantageous in that: the control method and circuit architecture are comparatively simpler since the charging/discharging time of the integrator no longer required to be controlled precisely, and thus the integration error due to insufficient resolution in delay element can be avoided.

Abstract: A radiation detection signal processing method and a radiation detection signal processing system using the method are provided, which combine trigger signals and time mark information. The method includes: providing a radiation detection signal processing system having a plurality of front-end detectors, where each front-end detector detects a radiation event to generate a corresponding energy signal; generating a corresponding trigger signal according to the corresponding energy signal; generating a first signal and a second signal according to all trigger signals; and obtaining time differences among the trigger signals according to the first signal and the second signal, converting the time differences into a set of time marks, merging all of the trigger signals and the set of time marks into a hybrid time signal, and transmitting the hybrid time signal to a hybrid event coincidence detection circuit.

Abstract: A radiation detection signal processing method and a radiation detection signal processing system using the method are provided, which combine trigger signals and time mark information. The method includes: providing a radiation detection signal processing system having a plurality of front-end detectors, where each front-end detector detects a radiation event to generate a corresponding energy signal; generating a corresponding trigger signal according to the corresponding energy signal; generating a first signal and a second signal according to all trigger signals; and obtaining time differences among the trigger signals according to the first signal and the second signal, converting the time differences into a set of time marks, merging all of the trigger signals and the set of time marks into a hybrid time signal, and transmitting the hybrid time signal to a hybrid event coincidence detection circuit.

Abstract: A display device includes a display panel and a driving circuit. The display panel has a pixel including red, green, blue, and white sub-pixels. The driving circuit receives a display signal and provides at least a first luminance weighting and a second luminance weighting of the red, green, blue, and white sub-pixels respectively. The display device selects one of the first luminance weighting and the second luminance weighting to drive the pixel according to the different operating modes of the display device.

Abstract: The present invention provides an over driving circuit of a liquid crystal display is provided. The circuit comprises a buffer, a memory coupling with the buffer and a modifier coupling with the buffer, the memory and a signal line. This signal line is used to transfer a row number signal to the modifier. The modifier may generate a corrected gray level value to a pixel unit based on a gray level value of present frame from the buffer, a gray level value of previous frame from the memory and the row number signal.

Abstract: A display device includes a display panel and a driving circuit. The display panel has a pixel including red, green, blue, and white sub-pixels. The driving circuit receives a display signal and provides at least a first luminance weighting and a second luminance weighting of the red, green, blue, and white sub-pixels respectively. The display device selects one of the first luminance weighting and the second luminance weighting to drive the pixel according to the different operating modes of the display device.

Abstract: An LCD device is disclosed. The LCD device includes an LCD panel, a first driving circuit, and a second driving circuit. The LCD panel includes a plurality of pixels, where each of the plurality of pixels has a plurality of subpixels corresponding to different colors and the plurality of subpixels are arranged in a matrix. The first driving circuit is electronically connected to odd data lines of the LCD panel and utilized for driving subpixels located on an active gate line and alternating polarities of pixels. The second driving circuit is electronically connected to even data lines of the LCD panel and utilized for driving subpixels located on the active gate line and alternating polarities of pixels.

Abstract: The present invention provides an over driving circuit of a liquid crystal display is provided. The circuit comprises a buffer, a memory coupling with the buffer and a modifier coupling with the buffer, the memory and a signal line. This signal line is used to transfer a row number signal to the modifier. The modifier may generate a corrected gray level value to a pixel unit based on a gray level value of present frame from the buffer, a gray level value of previous frame from the memory and the row number signal.