Abstract: A linearity power amplification device is provided. The device comprises a divider, a combiner, n?1 first signal paths, and a second signal path coupled between the divider and the combiner. The first signal path comprises a main invariable attenuator connected to the divider, a first power amplifier connected to the combiner, and a first attenuator and a first shifter coupled between the first power amplifier and the main invariable attenuator. The second signal path comprises a main amplification circuit, and an error calibration circuit.

Abstract: A magnetic resonance apparatus is provided. The magnetic resonance apparatus includes a scanning unit configured to execute a plurality of T2-weighted sequences having different echo times, and a plurality of diffusion-weighted sequences having different b factors, a first calculating unit configured to calculate a T2 value based on a plurality of T2-weighted images obtained by the plurality of T2-weighted sequences, a second calculating unit configured to calculate a perfusion fraction where the T2 value is not taken into account based on a first T2-weighted image in the plurality of T2-weighted images and a plurality of diffusion-weighted images obtained by the plurality of diffusion-weighted sequences, and a third calculating unit configured to calculate a perfusion fraction where the T2 value has been taken into account based on the T2 value calculated by the first calculating unit, and based on the perfusion fraction calculated by the second calculating unit.

Abstract: An X-ray lens is provided. The lens is located behind an X-ray tube and a collimator, the collimator located behind the X-ray tube, such that X-rays emitted from the X-ray tube pass through the collimator and then pass through the X-ray lens, wherein the X-ray lens is a monolithic capillary parallel lens configured to transform a cone emanant beam penetrating the collimator into parallel X-rays.

Abstract: An ultrasound probe connected to an ultrasound diagnostic apparatus configured to transmit an ultrasound beam to a target object is provided. The ultrasound probe includes a switching unit including N/2 channels, each channel configured to switch between a first pole and a second pole, wherein N is a natural number, N/2 first transducer elements connected to the first pole and placed in two-dimensions, wherein a placement is defined in an x-axis direction and a y-axis direction, and N/2 second transducer elements connected to the second pole and placed in two-dimensions, wherein the placement is defined in the x-axis and y-axis directions, wherein a placement of a channel number of the first transducer elements and a placement of a channel number of the second transducer elements differ in the x-axis and y-axis directions.

Abstract: An X-ray CT apparatus is provided. The X-ray CT apparatus includes an X-ray tube configured to apply an X-ray onto a subject, a scan device configured to rotate the X-ray tube about the subject to perform an X-ray CT scan, a first control device configured to switch an X-ray output of the X-ray tube from a first level to a second level smaller than the first level when the X-ray tube is placed at a first view angle, and configured to switch the X-ray output from the second level to the first level when the X-ray tube is placed at a second view angle, and a second control device configured to set the first view angle and the second view angle such that an X-ray exposure dose reduced by setting the X-ray output of the X-ray tube smaller than the first level becomes even on right and left sides.

Abstract: A locking mechanism for probe connector that is connected to a shaft of the probe connector, includes a door and a drive assembly for releasing or locking the probe connector by opening and closing of the door.

Abstract: A method and system are disclosed for a compact, inexpensive ultrasound system using an off-the--shelf personal digital assistant (PDA) device interfacing to a hand-held probe assembly through a standard digital interface. The hand-held probe assembly comprises a detachable transducer head attached to a beamforming module that performs digital beamforming. The PDA runs Windows applications and displays menus and images to a user. The PDA also runs ultrasound data processing software to support a plurality of imaging modes. An internal battery is provided in the PDA to power the system. The transducer head is detachable from the beamforming module.

Abstract: A remote controller, a remote control system and an X-ray system including the same. The remote control system includes a remote controller and a processing unit located in a controlled system controlled by the remote controller. The remote controller includes at least one key for a user to select a controlled object to be controlled via the remote controller, a sensing unit for sensing an orientation of the remote controller; and a wireless transmitter for transmitting to the controlled system which of the at least one key is selected by the user and orientation information of the remote controller sensed by the sensing unit. The processing unit generates a control command for the controlled system in accordance with information about the user's key selection and orientation information of the remote controller to control movement of a controlled object corresponding to the selected key in accordance with the remote control's orientation.

Abstract: An imaging system configured to automatically detect a patient's body profile and to position the patient. The imaging system includes a scan support member configured to support a scan object, a processing device; and an identification device electrically connected to the processing device. The scan support member includes a machine identifiable code representing a distance from a position of the machine identifiable code to one end of the scan support member. The identification device is configured to identify the machine identifiable code, to decode the distance represented by the machine identifiable code and to send the distance represented by the machine identifiable code to the processing device. The processing device determines a distance from an interested location of the scan object to a scanning plane of the imaging system according to the distance represented by the machine identifiable code.

Abstract: A CT imaging system and a method for determining a CT collimator slit profile. The method includes determining a profile of two opposite edges of the collimator slit in a longitudinal direction thereof based on the following: a vertical distance between a focus of a radiation source to the collimator slit, a vertical distance between the focus and the radiation detector, an inclination angle between adjacent detector elements, a length of each detector element, a desired width of projection on the radiation detector by the radiation rays passing through the slit whose longitudinal edge profile is to be determined, and an offset angle of a connecting line from a point on a longitudinal center line of the slit to the focus relative to a plane passing said focus and perpendicular to the slit.

Abstract: A method for geometric calibration of a CT scanner, including, for each row of at least one row of detector cells, establishing a complete geometric description of the CT scanner, including at least one unknown geometric parameter, establishing a description of a forward projection function using the complete geometric description, acquiring actual projection coordinates of a calibration phantom placed in a scanning field of view (SFOV) on a current row of detector cells and corresponding to a plurality of angles, acquiring calculated projection coordinates of the calibration phantom on the current row of detector cells and corresponding to the plurality of angles using the description of the forward projection function, and acquiring a calibrated value for the at least one unknown geometric parameter by evaluating the at least one unknown geometric parameter based on the acquired actual projection coordinates and calculated projection coordinates via a nonlinear least square fitting algorithm.

Abstract: A method and apparatus for data conversion in an unequal ? angle CT system. The method for imaging in a CT system having a flat module detector array includes obtaining fan beam projection data of an object from a CT scan, obtaining a geometric structure parameter of the flat module detector array; rebinning data from the fan beam projectiondata to parallel beam projection data based on the geometric structure parameter to convert the fan beam projection data into the parallel beam projection data, and generating a CT image from the parallel beam projection data.

Abstract: A method of transmitting raw data by a data acquisition system in a CT scanning system, wherein the CT scanning system comprises a rotational part of a gantry with at least one raw data backup memory, and wherein the data acquisition system is configured to adopt the at least one backup memory for storing a backup of the raw data. The method comprising: generating the raw data as scanned; storing generated raw data in the at least one backup memory; transmitting the raw data to an operation console in the CT scanning system; and repeating generating, storing, and transmitting of the raw data in the case of an unfinished scan, until the unfinished scan is finished.

Abstract: A computerized tomography (CT) method and CT system. The method comprises projecting a beam from a radiation source within a display field of view (DFOV) toward a subject to be imaged; receiving, at a detector, the projected beam to collect projection data; determining whether in the projection a truncation occurs in which the subject exceeds the DFOV; and recording a truncated location of the projection if truncation occurs.

Abstract: A method for automatically determining the best effective reconstruction gap, the method including scanning a phantom to collect image data of the phantom, using a plurality of different gap values to reconstruct image of the phantom respectively, based on the image data, thus obtaining a plurality of images respectively associated with different gap values, selecting the best image from the plurality of images, and automatically determining the gap value associated with the best image, and save it as the best effective reconstruction gap.

Abstract: An imaging system for achieving automatic detection of a patient's body profile and intelligent positioning of the patient. The imaging system includes at least one transmitter disposed on one side of a bore of the imaging system, and a receiver disposed on the other side of the bore of the imaging system. The at least one transmitter is configured to transmit a beam incapable of effectively penetrating a scan object. The receiver is configured to receive the beam transmitted by the at least one transmitter and to send a received signal to a processing device. The processing device is electrically connected to the receiver, and configured to determine whether the beam transmitted by the at least transmitter is blocked by the scan object according to the received signal so as to determine a position of the scan object.

Abstract: A cradle drive mechanism, a table and a patient imaging and carrying apparatus are provided. The cradle drive mechanism includes: a first portion, which is arranged on a main base and has a belt drive structure, wherein the belt drive structure is used to connect a cradle and drive the cradle to make a reciprocating motion; a second portion, which is arranged on a secondary base and has a secondary supporting and rotating member, wherein the second portion and the first portion form a gap therebetween, and the secondary supporting and rotating member is used to support the cradle; and two guiding and rotating members, which are arranged on the second portion and/or the first portion for guiding the cradle to move linearly. The present application can simplify the structure by adoption of the belt drive structure. Further, the gap between the second portion and the first portion does not attenuate the X-ray additionally, so the dose of the X-ray emitted can be decreased.

Abstract: An uninterruptible power supply configured to automatically detect a load level and automatically power off and disable power supply or automatically power on and enable the power supply based on a detected load level, so that energy of a backup source of the uninterruptible power supply is not wasted and a life-cycle of the uninterruptible power supply is extended.