Abstract: According to one embodiment, there is provided an X-ray CT apparatus which comprises high voltage generation processing circuitry configured to selectively generate a first voltage and a second voltage higher than the first tube voltage; a first filter formed from a material having substantially the same atomic number as that of a contrast material to be administered to an object and configured to perform radiation quality adjustment; a second filter formed from a material different from the contrast material and configured to perform radiation quality adjustment; a filter switching mechanism configured to switch between the first filter and the second filter to be interposed between a X-ray tube and the object; and control processing circuitry configured to control the high voltage generation unit and the filter switching mechanism to synchronize switching between the first voltage and the second voltage with switching between the first filter and the second filter.

Abstract: A medical image diagnostic apparatus according to an embodiment includes detecting elements and processing circuitry. Each of the detecting elements contains, in an effective area thereof, a plurality of cells each configured to output an electrical signal when at least one photon has become incident thereto. Processing circuitry generates an image on the basis of a signal obtained by adding together the electrical signals output by the plurality of cells. The medical image diagnostic apparatus according to the embodiment includes a plurality of arrays in each of which two or more of the detecting elements containing an equal quantity of cells in the effective areas thereof are arranged, while the plurality of arrays are arranged in such a manner that the distances between the centers of the effective areas are constant.

Abstract: A control circuit for a computer-aided tomography (CT) system includes an input that receives a master timing signal and an input that receives a first timing signal. The control circuit includes a mode detection circuit that determines the scan mode of the CT system based on the master timing signal and a first timing signal, where the frequency of the first time signal is lower than the frequency of the master timing signal. The control circuit also includes a circuit that generates a second timing signal based on the master timing signal and the scan mode, where the second timing signal that has a lower frequency than the master timing frequency but a higher frequency than the frequency of the first timing signal.

Abstract: A gantry includes two X-ray source rings and a detector ring. Each X-ray source ring includes a plurality of X-ray sources arrayed circumferentially. The detector ring is provided next to the X-ray source ring and includes a plurality of X-ray detectors arrayed circumferentially. Each of the plurality of X-ray detectors detects X-rays from the X-ray source ring. A data collection circuit collects raw data corresponding to the intensity of the detected X-rays. A reconstruction unit reconstructs the collected raw data into a CT image based on digital data.

Abstract: A gantry includes an X-ray source ring and a detector ring. The X-ray source ring includes a plurality of X-ray sources arrayed circumferentially. The detector ring is provided next to the X-ray source ring and includes a plurality of X-ray detectors arrayed circumferentially. Each of the plurality of X-ray detectors detects X-rays from the X-ray source ring. At least one wedge filter is provided on the inner circumferential side of the X-ray source ring. A filter support member supports at least one wedge filter rotatable about the rotation axis. A filter driver drives the filter support member. An imaging controller controls the filter driver to rotate at least one wedge filter about the rotation axis in synchronism with generation of X-rays from the X-ray source ring.

Abstract: A photon-counting type X-ray computed tomography apparatus that comprises a high-voltage generator to generate a voltage signal, an X-ray tube to emit X-rays when the X-ray tube receives the voltage signal from the high-voltage generator, an X-ray detector to detect photons derived from the X-rays emitted from the X-ray tube, and circuitry to count a number of the detected photons with respect to a plurality of energy bands, detect a number of photons in a first energy band that exceeds an energy level corresponding to a voltage value of the voltage signal, and changing a number of photons at a second energy band based on the detected number of photons in the first energy band, to correct for operational limitations of the X-ray detector.

Abstract: A fluid heating device for heating chemicals mainly containing sulfuric acid, which is capable of suppressing reduction of heating efficiency even if a fluid mainly containing sulfuric acid is heated, includes a translucent inner tube composed of quartz or the like, a lamp heater disposed in the inner tube, a translucent outer tube disposed outside the inner tube, which is composed of quartz or the like, translucent side plates disposed on both sides of the outer tube, which include quartz or the like, and an amorphous carbon pipe disposed between the outer tube and the inner tube, which functions as a light-absorbing material, wherein the amorphous carbon pipe is disposed so as to be brought into contact with chemicals passing through a space between the outer tube and the inner tube.

Abstract: An X-ray CT apparatus includes: a detector that detects X-rays that have passed through a subject; a data acquiring unit that, for each of predetermined energy bands, counts photons having an energy level included in the predetermined energy band, from among photons derived from the X-rays detected by the detector; an acquisition controlling unit that controls the data acquiring unit in such a manner that energy bands including energy levels which the photons representing substances that are not of interest have are each larger than an energy band including an energy level which the photons representing a substance of interest have, in accordance with an image taking condition under which an image taking process is performed on the subject; and an image reconstructing unit that reconstructs an X-ray CT image by using a counting result obtained by the data acquiring unit controlled by the acquisition controlling unit.

Abstract: A control circuit for a computer-aided tomography (CT) system includes an input that receives a master timing signal and an input that receives a first timing signal. The control circuit includes a mode detection circuit that determines the scan mode of the CT system based on the master timing signal and a first timing signal, where the frequency of the first time signal is lower than the frequency of the master timing signal. The control circuit also includes a circuit that generates a second timing signal based on the master timing signal and the scan mode, where the second timing signal that has a lower frequency than the master timing frequency but a higher frequency than the frequency of the first timing signal.

Abstract: A fluid heating device for heating chemicals mainly containing sulfuric acid, which is capable of suppressing reduction of heating efficiency even if a fluid mainly containing sulfuric acid is heated, includes a translucent inner tube composed of quartz or the like, a lamp heater disposed in the inner tube, a translucent outer tube disposed outside the inner tube, which is composed of quartz or the like, translucent side plates disposed on both sides of the outer tube, which include quartz or the like, and an amorphous carbon pipe disposed between the outer tube and the inner tube, which functions as a light-absorbing material, wherein the amorphous carbon pipe is disposed so as to be brought into contact with chemicals passing through a space between the outer tube and the inner tube.

Abstract: An apparatus for X-ray CT imaging including an X-ray irradiation unit configured to irradiate an X-ray toward a subject, an X-ray detector having a plurality of X-ray detection elements along a channel direction and a row direction, a couch on which the subject can be arranged, a rotation unit on which the X-ray irradiation unit and the X-ray detector are oppositely disposed and rotate around the couch, a controller configured to execute a helical scan while fluctuating an X-ray focal spot along a body axis direction of the subject by controlling the X-ray irradiation unit, and an image processing unit configured to generate a reconstructed image based on data acquired by the helical scan, wherein the controller is further configured to set a magnitude of fluctuation of the X-ray focal spot so that data acquisition loci of the helical scan do not overlap each other.

Abstract: An X-ray computed tomography apparatus according to an embodiment includes an X-ray tube, a bias power supply, and an X-ray control unit. The X-ray tube includes a cathode, an anode, and a grid between the cathode and the anode. The bias power supply generates a bias voltage to be applied to the grid to control a tube current between the cathode and the anode. The X-ray control unit applies a bias voltage as a pulse string for generating a constant tube current and controls at least one of the pulse count and pulse width of a bias voltage for each predetermined period.

Abstract: An X-ray CT apparatus has: a plurality of X-ray detection elements arranged in a matrix form; a QV amplifier unit having a plurality of QV amplifiers; a first connection unit connecting the plurality of X-ray detection elements and the QV amplifier unit; an AD converter unit having a plurality of AD converters; and a second connection unit connecting the QV amplifier unit and the AD converter unit. The plurality of X-ray detection elements and the QV amplifier unit are connected and the QV amplifier unit and the AD converter unit are connected so as to make different at least one of a signal processing characteristic of the QV amplifier unit and signal a processing characteristic of the AD converter unit for each X-ray detection element of the plurality of X-ray detection elements or for each of an adjacent plurality of X-ray detection elements.

Abstract: A casing of a motor with resolver includes a stator, a motor shaft rotatably supported by a bearing, a motor rotor integrally rotatable with the motor shaft, and a resolver for detecting a rotation angle of the motor rotor. The resolver includes a disc-shaped resolver stator held on the motor casing and having a surface on which a thin-film-shaped coil is formed, and a disc-shaped resolver rotor provided on an end face of the motor rotor and having a surface on which a thin-film-shaped coil is formed. Part of the motor casing holding the outer periphery of the resolver stator is formed as a shield portion cylindrically protruding along the outer periphery of the resolver rotor to the rotor. The motor casing and the shield portion are each made of a non-magnetic conductive material.

Abstract: A replacement blade razor including a holder having a head portion, a razor head supported by the head portion of the holder, and a blade member removably mounted in the razor head is provided. The head portion of the holder or the razor head includes a holding mechanism that assists in mounting of the blade member in the razor head by attracting or adhering to the blade member and thus causing the razor head to hold the blade member.

Abstract: A phase difference type resolver is adapted such that a calculator calculates an angle from a phase difference at a detection-signal zero cross point, determines a velocity at the angle based on an angle calculated from a phase difference at a previous detection-signal zero cross point, calculates an estimated angle at a next detection-signal zero cross point based on the velocity, divides a difference between the estimated angle and the angle into predetermined minimum detection angles, and outputs a real-time signal based on the minimum detection angles in a range after the angle but before the estimated angle.

Abstract: A resolver includes a disc-shaped rotor provided with a detection coil pattern formed in flat shape and a stator formed in flat plate shape placed to concentrically fact the rotor in an axial direction and configured such that a planar first excitation coil pattern to which a cosine wave is supplied and a planar second excitation coil pattern to which a sine wave is supplied, the first and the second patterns being laminated. The first and second excitation coil patterns are placed to face the detection coil pattern. An insulation layer is formed with insulating coating material between the first and second excitation coil patterns.

Abstract: An X-ray tube includes: a Wehnelt electrode having a dent inside; a filament arranged in the dent of the Wehnelt electrode and configured to emit an electron beam when electricity is passed therethrough; an anode configured to emit an X-ray in response to the incident electron beam; an electrode part configured by at least one pair of electrode members, the electrode members facing each other across a path of the electron beam, a voltage being applied to each of the electrode members; a voltage controller configured to control the voltage applied to the electrode part; and a shield member arranged in contact with the Wehnelt electrode and configured to cover part of the dent by a projecting part.