Abstract: An image acquisition unit acquires two radiographic images based on radiation which has different energy distributions and has been transmitted through a subject including a soft part and a bone part. A subtraction unit performs weighting subtraction using a predetermined initial weighting coefficient between corresponding pixels of the two radiographic images to derive a soft part image obtained by extracting the soft part of the subject and a bone part image obtained by extracting the bone part of the subject. A weighting coefficient derivation unit derives a new weighting coefficient on the basis of a pixel value of the bone part included in the bone part image. The subtraction unit performs the weighting subtraction on the two radiographic images using the new weighting coefficient to derive a new soft part image and a new bone part image.

Abstract: The present disclosure relates to a system for PET imaging. The system may include a first device and a second device. The first device may include a first scanning channel. The second device may include a second scanning channel connected to the first scanning channel, a heat generating component, and a cooling assembly configured to cool the heat generating component, wherein the cooling assembly may include an inlet chamber and a return chamber, the heat generating component may be closer to a first side of the second device than at least one of the inlet chamber or the return chamber, and the first side of the second device may face the first device.

Abstract: Imaging systems and methods are provided for scanning a patient's head using a portable CT scanner. An imaging assembly can comprise a portable scan board on which a patient is positioned, and a corresponding portable CT scanner positioned and locked onto the portable scan board. The portable CT scanner and the portable scan board can form a portable CT scanning assembly capable of rotating an X-ray source and corresponding X-ray detector around the patient's head to transmit X-rays through the patient's head at one or more angles, while translating across the portable scan board to scan one or more portions of the patient's head. A composite image reconstructed based on the rotational and translational scanning is generated representing one or more interior aspects of the patient's head.

Abstract: An example system includes an x-ray absorber. The x-ray absorber is to convert received x-rays into electrical energy. The system also includes a memory. The memory is to receive the electrical energy. The memory also is to output a stored value using the electrical energy. The system includes a transmitter. The transmitter is to produce x-rays representative of the stored value.

Abstract: An architecture for a multichannel geophysical data acquisition system is provided in the field of electrical resistivity tomography. Individual and autonomous node operating systems are provided. Separate communication channels for upstream and downstream data transfer, high voltage transfer and synchronization signals are provided. A novel use of high voltage isolation barriers is also provided. A direct memory access data transfer process is provided.

Abstract: The invention relates to an electrical transformer (T, T?) comprising: a primary central winding (11a) extending around an axis (X) and configured to generate a central magnetic flux when a current is passed through it circulating in a first direction around the axis (X), two peripheral primary windings (12a, 13a) extending around the axis (X), between which the central primary winding (11a) is located, and configured to generate peripheral magnetic fluxes when currents are passed through same respectively circulating in a second direction around the axis (X) which is opposite to the first direction, the peripheral magnetic fluxes superimposing on the central magnetic flux, wherein the windings are further configured in such a way that the peripheral magnetic fluxes compensate the central magnetic flux in the regions located beyond the peripheral windings.

Abstract: An X-ray generator includes an X-ray tube, an X-ray tube accommodation portion, and a power source unit having an internal substrate supplying a voltage to the X-ray tube sealed inside an insulating block. Insulating oil is enclosed in a space defined by an upper surface of the insulating block and an inner surface of the X-ray tube accommodation portion. A high-voltage power supply unit connected to a target support portion is disposed on the upper surface. At least one protrusion portion protruding to an insulating valve side beyond a boundary portion where the high-voltage power supply unit, the upper surface, and the insulating oil meet and surrounding the high-voltage power supply unit is provided on the upper surface. An apex portion of the protrusion portion is separated from an imaginary plane including an end portion of the insulating valve and extending in a direction orthogonal to a tube axis.

Abstract: An X-ray generator includes an X-ray tube, an X-ray tube accommodation portion, and a power source unit having an internal substrate supplying a voltage to the X-ray tube sealed inside an insulating block. A first space is defined by an upper surface of the insulating block and an inner surface of the X-ray tube accommodation portion. A second space is defined by a recess portion opening to the outside formed on a side surface of the insulating block and a sealing member sealing an opening of the recess portion. A communication hole causing the first space and the second space to communicate with each other is provided in the insulating block. Insulating oil is enclosed in the first space and the second space. A depth of the recess portion is smaller than a width of the recess portion.

Abstract: When a control unit 30 detects that the apparatus becomes a traveling mode, the control unit 30 stops the power supply from a power supply circuit 52 to an opening-degree sensor S2 of a collimator leaf and a distance sensor S3 for detecting the distance between an X-ray tube 11 and a subject. On the other hand, for an acceleration sensor S1 for measuring the acceleration of a collimator 12, power supply from the power supply circuit 52 is stopped. When the control unit 30 determines that the apparatus is not in the traveling mode, electric power is supplied to all of the acceleration sensor S1, the opening-degree sensor S2, and the distance sensor S3. As a result, power consumption can be reduced by constantly supplying electric power to the acceleration sensor S1 required to perform constant monitoring, and in the traveling mode, power supply to the opening-degree sensor S2 and the distance sensor S3 used when performing X-ray imaging is stopped, so that power consumption can be reduced.

Abstract: Vehicles and vehicle power circuits are disclosed for providing multiple different voltages from the same power source. An example vehicle includes a power source, a plurality of electrical loads, and a power circuit. The power circuit is electrically connected to the power source and the plurality of electrical loads. The power circuit includes a plurality of power segments connected in parallel to the power source, each power segment comprising a DC to DC converter and an ultra capacitor in series with the DC to DC converter, wherein the ultra capacitors of the plurality of power segments are connected in series.

Abstract: A radiation imaging system includes a plurality of imaging apparatuses configured to generate images based on radiation emitted from radiation generating apparatuses configured to perform radiation irradiation and a control apparatus configured to communicate with the plurality of the imaging apparatuses. The control apparatus comprises: an obtainment unit configured to obtain imaging information from each of the plurality of imaging apparatuses, a selection unit configured to select one imaging apparatus from the plurality of imaging apparatuses based on the imaging information obtained by the obtainment unit, and an image obtainment unit configured to obtain an image from the imaging apparatus selected by the selection unit, and the control apparatus further comprises a setting unit configured to set an imaging apparatus from which imaging information is obtained by the obtainment unit.

Abstract: Systems and methods are described for operating an imaging system that includes an intra-oral imaging sensor and an electronic processor. The intra-oral imaging sensor includes a housing, an image sensing component at least partially housed within the housing, and a multi-dimensional sensor at least partially housed within the housing. The electronic processor is configured to receive an output of the multi-dimensional sensor indicative of movement of the intra-oral imaging sensor. The output is compared to predetermined movement criteria indicative of a type of movement and, in response to determining that the type of movement of the imaging sensor has occurred, the electronic processor alters the operation of the imaging system.

Abstract: A device for signalling into the environment the status of a radio transmission apparatus, and in particular of an apparatus provided with an X-ray tube, such that the signalling device includes:—a first part, capable of being connected at the power cable of the transmission apparatus, and includes means for measuring the current demand of the transmission apparatus, processing means for determining the status,—switched off, on standby, or in use—of the transmission apparatus depending on the current measurement and means for transmitting the detected status to a second part,—a second part including means for signalling the status of the transmission apparatus detected by the first part.

Abstract: A C-arm X-ray imaging system is provided. The C-arm X-ray imaging system includes a base, an extension arm, a first monitor coupled to the base via a first end of the extension arm, a support, and a second monitor coupled to the base via the support. The first end of the extension arm and the support are vertically aligned and configured to rotate about a common rotational axis to enable independent rotation of the first and second monitors.

Abstract: A system including an x-ray scanner gantry having: a housing; a gantry gear; a rotor; a generator mounted on the rotor; and first and second generator gears connected to or engaged with one or more axles of the generator. The second generator gear is engaged with the gantry gear. A motor rotates the intermediate gear via a motor gear. A second actuator actuates the motor gear to engage the motor with the rotor. A control module operates in first and second modes and: while in the first mode, engages the intermediate gear to the first generator gear via the first actuator to rotate, via the motor gear, the intermediate gear and as a result the first generator gear; and while in the second mode, engage the motor to the rotor via the second actuator to rotate, via the motor gear, the rotor and as a result the second generator gear.

Abstract: Described is an image guided radiation therapy (IGRT) apparatus comprising a medical imaging device and a radiation source, wherein the radiation source is provided on a gantry which surrounds the medical imaging device. The apparatus further comprises ducting for directing cool air from a source of cool air to a gap between the gantry and the medical imaging device.

Abstract: A device for recovering a temporal reference in a free-running magnetic resonance tomography (MRT) receive chain includes a time reference encoder and a time reference decoder. The time reference encoder is configured to generate a modulation signal as a function of a reference clock, where the modulation signal is configured for a correlation with a temporal resolution less than a maximum predetermined phase deviation and a maximum that may clearly be identified. The time reference decoder is configured to receive, via the first signal input, a receive signal as a function of the modulation signal, perform a correlation with a reference signal, and generate a signal as a function of a temporal reference of the modulation signal in the receive signal in relation to the reference signal.

Abstract: A circuit arrangement includes an X-ray tube, including a cathode and an anode, and a high-voltage transformer. In an embodiment, the high-voltage transformer includes at least one primary winding, at least one first secondary winding, including a first oscillating circuit, wherein the first oscillating circuit includes a first leakage inductance and a first winding capacitance, to adjust a first resonance frequency, and at least one second secondary winding, including a second oscillating circuit, wherein the second oscillating circuit includes a second leakage inductance and a second winding capacitance, to adjust a second resonance frequency, the first resonance frequency matching the second resonance frequency, the first winding capacitance and the second winding capacitance differing in value and the first leakage inductance and the second leakage inductance differing in value.

Abstract: A computed tomography (CT) scanning apparatus is provided. The CT scanning apparatus includes an energy storage component disposed in a stationary portion of the CT scanning apparatus, wherein the energy storage component is configured to receive electrical power from an external source and to store the electrical power. The CT scanning apparatus also includes an energy storage management system coupled to the energy storage component and configured to regulate both storage of the electrical power on the energy storage component and utilization of the electrical power stored on the energy storage component by the CT scanning apparatus. The energy storage component is configured to serve as an uninterruptible power supply (UPS) for the CT scanning apparatus and to provide peak power shaving during peak power operation of the CT scanning apparatus.

Abstract: An x-ray imaging condition modification method includes modifying a first imaging condition to a second imaging condition by changing a value of at least one parameter among parameters included in the first imaging condition to an arbitrary value, and changing values of remaining parameters that are parameters other than the at least one parameter using the arbitrary value and an approximate function.

Abstract: A method for detecting electron beam filament wear in an electron beam source, the method comprising the steps of: enlarging a beam spot emanating from the electron beam source on a work table to a predetermined minimum size, capturing an image of the beam spot on the work table by a camera, comparing the captured image of the beam spot with a reference image, and detecting filament wear if the captured image is deviating more than a predetermined value from the reference image.

Abstract: In order to reduce the amount of electrical insulation needed for voltage isolation of large voltages generated by a voltage multiplier, the voltage multiplier can be shaped to smooth out electric field gradients. The voltage multiplier can comprise multiple sections, each section located in a different plane. The voltage multiplier can comprise a negative voltage multiplier and a positive voltage multiplier, each inclined at different angles with respect to each other. The voltage multiplier can include a curved shape.

Abstract: A high-voltage generator for an X-ray device includes an input-side inverter unit, an output-side rectifier unit and a transformer connected between the inverter unit and the rectifier unit. The inverter unit is configured to generate two inverter voltages that are phase-shifted with respect to each other. These inverter voltages are transformed by the transformer into two rectifier voltages that are fed to the rectifier unit such that in no-load operation, one of the two rectifier voltages is proportional to the sum of the inverter voltages while the other of the two rectifier voltages is proportional to the difference between the inverter voltages.

Abstract: A high voltage transformer apparatus, including: a tank; a high voltage transformer, disposed upright on one side within the tank, including a first transformer unit configured to generate a positive voltage and a second transformer unit configured to generate a negative voltage; a positive high voltage terminal and a negative high voltage terminal respectively disposed on the other side within the tank opposite to the first transformer unit and the second transformer unit; a first circuit board disposed between the first transformer unit, the first side wall, and the positive high voltage terminal; and a second circuit board disposed between the second transformer unit, the second side wall, and the negative high voltage terminal; wherein the first and second circuit boards are respectively configured to rectify, filter and sample the positive and negative voltages.

Abstract: A hybrid x-ray system that includes an x-ray device for mounted and portable use. The x-ray device includes a housing, an x-ray source coupled to the housing and configured to generate x-ray radiation, and a support connector coupled to the housing. The support connector is configured to mechanically couple to a support arm and to mechanically couple to a handle. The x-ray device include power circuitry or is otherwise configured to selectively receive power from a battery and an AC power source.

Abstract: An X-ray generation apparatus includes an X-ray tube; a drive circuit that drives the X-ray tube; a voltage generation circuit that generates an electron acceleration voltage applied to the X-ray tube; and a control unit that communicates with the drive circuit, and at least the X-ray tube, the drive circuit, and the voltage generation circuit are arranged inside a storage container filled with an insulating oil. At least a part of a path connecting the drive circuit and the control unit is formed of an optical fiber cable arranged inside the storage container, and the optical fiber cable has electric field mitigation means for suppressing an electric field occurring due to a potential difference between the drive circuit and the control unit from locally concentrating along a longitudinal direction of the optical fiber cable.

Abstract: An X-ray diagnostic apparatus according to embodiments includes an X-ray tube assembly and a grid potential control circuitry. The X-ray tube assembly includes a filament that emits electrons, a target that generates X-rays by receiving the electrons, and a grid having a potential for adjusting a potential gradient around the filament. The grid potential control circuitry switches the potential of the grid to a potential where the potential gradient around the filament becomes greater than a potential gradient generated by a potential of the filament and a potential of the target.

Abstract: An X-ray inspection system that can simply and automatically perform aging without separately preparing a shutter moving member including a dedicated motor or a guide member for aging is provided. When power is supplied, a stage moves in X and Y directions by activating a stage moving mechanism, and an X-ray source stops at an aging position below an X-ray shielding plate disposed beside a support plate on the stage. In this state, aging is started. When the aging is ended, an input of an imaging instruction for X-ray imaging is waited for.

Abstract: A medical imaging device includes a stationary device part and a moveable device part moveably mounted for this purpose. A power source is arranged on the stationary device part. A number of main electrical consumers, a number of secondary electrical consumers, and an energy storage device are arranged on the moveable device part. A power transmission link, arranged between the stationary device part and the moveable device part, is designed to transmit power from the stationary device part to the moveable device part. On the stationary device part, an energy emitting component of the power transmission link is connected to the power source and on the moveable device part, an energy receiving component of the power transmission link is switchably connected to the main consumer and to the secondary consumer via switching device(s), and to the energy storage device. The energy storage device is switchably connected to the secondary consumer.

Abstract: The present invention relates to control of wind turbines based on predicted operational trajectories. A control system for a wind turbine is described where a main controller calculating one or more predicted operational trajectories and a safety controller validates at least one of the one or more predicted operational trajectories. The control system controls the wind turbine with the predicted control trajectory if the validation is valid, and controls the wind turbine with a safe-mode control trajectory if the validation is invalid. In an embodiment, the main controller is implemented as a receding horizon controller, e.g. in the form of a model predictive controller (MPC).

Abstract: Methods and systems are described for operating an imaging sensor, the imaging sensor including a multi-dimensional sensor. An electronic processor receives an output from the multi-dimensional sensor and transitions the imaging sensor from the low-power state into a ready state in response to a determination by the electronic processor, based on the output from the multi-dimensional sensor, that a first state transition criteria is satisfied and transitions the imaging sensor from the ready state into an armed state in response to a determination that a second state transition criteria is satisfied. In some implementations, the electronic processor operates the imaging sensor to capture image data only when operating in the armed state and prevents the imaging system from transitioning from the low-power state directly into the armed state.

Abstract: Methods and systems are described for operating an imaging system that includes an intra-oral imaging sensor, an image sensing component, a multi-dimensional sensor, and an electronic processor. The intra-oral imaging sensor includes a housing and the image sensor component and the multi-dimensional sensor are at least partially housed within the housing. The multi-dimensional sensor includes a three-dimensional accelerometer, a three-dimensional gyroscope, and a three-dimensional magnetometer. The electronic processor is configured to execute one or more error condition check routines to determine whether an error condition is present based on an output received from the multi-dimensional sensor.

Abstract: Monitoring aging in an electric drive system includes energizing the electric drive system such that electrical current flows through a power semiconductor device therein, determining a value indicative of a voltage across the power semiconductor device, at a current level where voltage is substantially independent of temperature, comparing the determined value with a reference value, and outputting a signal responsive to a difference between the values that is indicative of an aging state of the power semiconductor device.

Abstract: A gantry rotation control device for a computed tomography scanning apparatus. The gantry rotation control device includes a radiation dose determination unit for determining radiation doses of the X-rays that will be emitted to each site of the target object to be scanned, a minimum velocity determination unit for determining a minimum rotation velocity of the gantry according to a maximum radiation dose in the determined radiation doses, a maximum velocity determination unit for determining a maximum rotation velocity of the gantry according to the determined minimum rotation velocity, a rotation velocity determination unit for determining a rotation velocity of the gantry at any time during scanning of the target object according to the determined minimum rotation velocity and maximum rotation velocity, and a gantry rotation control unit for controlling the gantry to scan the target object while rotating according to the determined rotation velocity when the target object is to be scanned.

Abstract: A gantry rail for a gantry computed tomography (CT) system includes a secondary side of a rotary transformer and an annular body having an annular rolling surface and an annular slip ring surface. The annular body is aligned orthogonal to a longitudinal axis of the gantry CT system. The annular rolling surface has a normal vector that extends radially outward and orthogonal to the longitudinal axis. The annular slip ring surface defines a plane orthogonal to the longitudinal axis, and includes a slot disposed in the slip ring surface. The slot is configured to engage the secondary side of the rotary transformer.

Abstract: The techniques and device provided herein relate to regulating a source generator in X-ray based measurement for downhole applications. A source stream of photons is produced, via a generator of an X-ray system of a logging tool. A direct channel allows for the passage of a stream of photons, where a high energy filter filters a low energy part of the stream of photons. The resultant stream is measured by a reference detector to identify a high energy peak in a spectrum measurement derived based upon the resultant photon stream. From there, a normalized difference between a plurality of windows of the high energy peak is determined and subsequent output of the generator is based upon the normalized difference.

Abstract: A mobile digital fluoroscopy system comprising a mobile X-ray system carrier unit (1) comprising a first and a second X-ray device (19, 20) each having a transmitter (21, 23) and a receiver (22, 24), wherein said respective first and second X-ray devices (19, 20) are configured to enable X-ray imaging in mutually intersecting planes, a kV unit 1012; and; wherein said a mobile control unit (2a) is communicatively coupled to the mobile X-ray system carrier (1) via a cable (150), wherein said mobile control unit (2a) is configured to receive a first set of image data 810 from said kV unit (1012) and sending a control signal to said kV unit (1012) upon completion of receiving of said image data 810, wherein kV unit 1012 is configured to generate a synchronization signal 820 to said transmitters (21, 23) and receivers (22,24) and to send a second set of image data 810 received from receivers (22,24) to the mobile control unit 2a.

Abstract: A system comprises a voltage multiplier ladder, a driver that provides an input voltage to the voltage multiplier ladder, and a controller that regulates the driver such that a voltage stress in the ladder is evenly distributed and do not exceed a maximum allowable stress and meanwhile the ladder is operating at an optimal efficiency.

Abstract: An MRI apparatus includes a data acquisition system, a charge/discharge element and a power control unit. The data acquisition system acquires nuclear magnetic resonance signals from an imaging region by performing a scan. The charge/discharge element is a part of an electric power system of the MRI apparatus, and is charged with external electric power. The power control unit controls the electric power system in such a manner that at least one unit excluding the data acquisition system is supplied with electric power from the charge/discharge element.

Abstract: According to one embodiment, a medical image processing apparatus includes a storage circuit and processing circuitry. The storage circuit stores correction data for emergency and/or correction data for normal time. The processing circuitry outputs a command to perform imaging of a patient and acquire radiographic data, and determines whether imaging time of the patient is in a first period during which temperature of an X-ray detector is stable or in a second period during which the temperature is not stable, before the imaging of the patient. In addition, the processing circuitry corrects the radiographic data by using the correction data for emergency when the imaging time is in the second period, and corrects the radiographic data by using the correction data for normal time when the imaging time is in the first period.

Abstract: An apparatus for suppression of arcs in an electron beam generator including: a first module providing an operating voltage; a second module including a coil suitable for a voltage of at least 10 kV, and at least one free-wheeling diode connected in parallel to the coil; a third module including a first circuit component configured to detect a first actual value for electric voltage, and a first signal is producible when the first actual value falls below a first threshold value, a second circuit component by which a second actual value for electric current is detectable, and a second signal is generated when the second actual value exceeds a second threshold value, a control logic, which optionally links the first and second signals and a resultant output signal is producible; a semiconductor-based switch suitable for the voltage of at least 10 kV, which is opened based on the output signal.

Abstract: Both the size reduction and the increase in breakdown voltage of a high-voltage isolation transformer are realized, which is to be used in an insulating liquid in an X-ray generating apparatus. In the isolation transformer, an annular core and a primary coil wound around the annular core are housed in a first container, and a secondary coil is wound around the first container. A first opening through which an insulating liquid flows is provided in the first container.

Abstract: The present invention relates to a dental radiography device capable of: reducing the amount of radiation exposure and the amount of battery consumption by reducing radiation exposure time by using a high switching frequency of 100 kHz or greater; preventing occurrence of operation errors caused by a momentary high voltage, etc. while using the high switching frequency; and easily setting X-ray irradiation time according to the type of teeth. Thus, the dental radiography device is safe, accurate and easy to use, and can have a small size and light weight.

Abstract: A medical imaging device includes an inverter with semiconductor switches for generating an AC voltage to be supplied to a load, a coil inductively coupled to a fastener that is electrically conducting, and a monitoring circuit for monitoring a current in the fastener based on a signal from the coil.

Abstract: A handheld x-ray fluorescence (XRF) device may include communication circuitry for communicating over a network. In some embodiments information related to sale and/or pricing of material identified by the XRF device is communicated by and/or to the XRF device. In some embodiments the XRF device communicates information regarding rental of the XRF device. In some embodiments the XRF device may be used to ascertain whether an item, for example an item of evidence or a particular item in a manufacturing environment, includes a material composition expected for the item, and in some embodiments storing or logging a result of such a determination.

Abstract: A method and an apparatus for transferring electric power to an electrical load (105); the method includes steps of: converting a direct electric current into an electric tension wave, applying the electric tension wave in inlet to at least a couple of electric capacitors (125, 130); supplying the electrical load (105) with the electric tension in outlet from the capacitors (125, 130).

Abstract: An interleaved double boost converter including two simple boost converters each having a diode, an input inductor, a switch connected to the anode of the diode and a filter capacitor connected to the cathode of the diode, the two switches and the two filter capacitors being connected at a mid-point, the interleaved double boost converter further including a control circuit controlling the switches adapted to control: at a first phase, the opening of a first switch the other remaining closed, both switches initially being closed; at a second phase, the opening of the second switch which had remained closed; and at a third phase, the closing of both switches.

Abstract: An inductive rotating power transfer circuit, preferably for transferring electrical power from the stationary part to the rotating part of a CT scanner comprises an inductive power transformer having a stationary primary side and a rotating secondary side. The secondary side is connected via a rectifier to a filtering capacitor, delivering electrical power to a load. One of the output pins of the filtering capacitor is connected to a secondary ground at the rotating part which is further connected to a stationary protective ground via a galvanic slip ring. In the case of a short circuit between a secondary transformer winding and the secondary ground, the secondary winding is partially short-circuited by one of the rectifier diodes. This causes an asymmetric current load at the primary side and a current flowing through the slip ring. Both currents may be used to detect a failure of the secondary winding.

Abstract: A miniature, portable x-ray system may be configured to scan images stored on a phosphor. A flash circuit may be configured to project red light onto a phosphor and receive blue light from the phosphor. A digital monochrome camera may be configured to receive the blue light to capture an article near the phosphor.

Abstract: A mobile X-ray imaging apparatus and a method of controlling the mobile X-ray imaging apparatus are provided. The mobile X-ray imaging apparatus includes an X-ray source mounted in a movable main body, a battery configured to supply operating power to the X-ray source, a charger configured to supply charging power to charge the battery, and a controller configured to block charging of the battery while X-rays are radiated.