Abstract: A zoom lens includes: a first lens group having negative refractive power on a most object side; and a positive lens group Pa having positive refractive power, a negative lens group N having negative refractive power, and a positive lens group Pb having positive refractive power that are arranged in this order from the object side and provided on an image side with respect to the first lens group.

Abstract: A wheel includes a boss, a rim, and a web. A rim-width center is positioned on a flange side of the rim with respect to a boss-width center. A plate-thickness center line of the web has a linear shape when the wheel is viewed in a longitudinal section. The plate-thickness center line is inclined with respect to a radial direction of the wheel in such a way as to be farther from the flange as the plate-thickness center line extends outward in the radial direction. When a distance in an axial direction of the wheel from a side face of the rim to an outer end of the plate-thickness center line is taken as “Pw” and a length of the rim in the axial direction is taken as “Wr”, Pw/Wr is less than 0.40.

Abstract: An operation device comprises a detector configured to detect an operation on a virtual switch by an operator to operate an X-ray irradiation in an X-ray diagnosis apparatus, wherein the virtual switch is virtually set at a position settled relatively with respect to the operator and output circuitry configured to output a detection result of the operation detected by the detector to the X-ray diagnosis apparatus to be operated. This device eliminates the need for looking away from a display monitor every time the operator operates the X-ray diagnosis apparatus.

Abstract: In one embodiment, an X-ray diagnostic apparatus can communicate with a controller configured to operate a catheter robot capable of moving an inserted device within the object and comprises a display and processing circuitry. The display is configured to display at least one fluoroscopic image of an object. The processing circuitry is configured to receive a control signal indicating a content of an operation on the catheter robot from the controller, acquire a plurality of fluoroscopic images of the object by irradiating the object with X-rays, control X-ray irradiation to the object, cause the display to display the plurality of fluoroscopic images to be sequentially acquired when the X-ray irradiation is performed, generate a plurality of reproduced images based on the plurality of fluoroscopic images acquired before a stop of the X-ray irradiation and cause the display to display the plurality of reproduced images when the X-ray irradiation is stopped.

Abstract: An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, an arm holding the X-ray tube and processing circuitry. The processing circuitry obtains body thickness information of a subject in an acquisition direction of an X-ray image at an arm position different from an arm position at a start of acquiring X-ray images. The processing circuitry sets, based on the body thickness information of the subject, acquisition condition at the start of acquiring the X-ray images. The processing circuitry starts acquiring of the X-ray images with the set acquisition condition. The processing circuitry acquires the X-ray images sequentially by rotating the arm while iteratively setting the acquisition condition by feedback control.

Abstract: A medical information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain an image capturing a space in which a manipulation is being performed on an examined subject and non-image information related to at least one of the manipulation, the examined subject, or the space. Also, the processing circuitry is configured to detect a situation having a high possibility for an occurrence of an abnormality in the space, on the basis of the obtained image, the obtained non-image information, and first correspondence information. The first correspondence information indicates a correspondence relationship between two or more images capturing the space, non-image information, and abnormalities having a high possibility of occurring in the space.

Abstract: According to one embodiment, an X-ray diagnosis apparatus includes a table, an imaging unit, and processing circuitry. The table includes a table top on which a subject is placed. The imaging unit includes an X-ray tube which emits X-rays to the subject and an X-ray detector which detects the X-rays. The processing circuitry detects contact between an object and at least one of the imaging unit and the table. The processing circuitry executes control to display contact position information relating to a position in contact with the object based on a detection result.

Abstract: An X-ray diagnostic apparatus of an embodiment includes an input interface, and processing circuitry. The input interface accepts an input operation performed by an operator. The processing circuitry identifies a period in which periodic movement is small in an X-ray irradiation area. The processing circuitry determines irradiation start timing of an X-ray according to the period. The processing circuitry controls to perform X-ray irradiation of a relatively high dose in the determined irradiation start timing on condition that the input operation is being continued.

Abstract: A wheel includes a boss, a rim, and a web. The rim includes a tread and a flange. The web connects the boss and the rim. When the wheel is viewed in its longitudinal section, the web has a linear plate-thickness center line that is inclined such that the plate-thickness center line approaches the flange side as it extends outward in a radial direction. When the wheel is viewed in its longitudinal section, an outer end of the plate-thickness center line is positioned between the flange and a center of the tread in an axial direction of the wheel.

Abstract: According to one embodiment, an X-ray diagnostic apparatus includes processing circuitry. The processing circuitry sets a plurality of ROIs in a first X-ray image. The processing circuitry calculates a statistical value for each ROI based on a plurality of values of pixels included in each ROI, thereby obtaining a plurality of statistical values. The processing circuitry acquires a threshold value for each statistical value. The processing circuitry determines a set of X-ray conditions relating to capturing of a second X-ray image subsequent to the first X-ray image based on the statistical value and the threshold value relating to each ROI.

Abstract: A wheel includes a boss, a rim, and a web. The rim includes a tread and a flange. A center of the rim in the axial direction of the wheel is disposed closer to the flange in the axial direction than a center of the boss in the axial direction is. The web has a plate-thickness center line that has a linear shape when the wheel is viewed in its longitudinal section. When an angle that the plate-thickness center line forms with the axial direction is denoted by ?, a distance in the axial direction from a side face of the rim to an outer end of the plate-thickness center line is denoted by Pw, a length of the rim in the axial direction is denoted by Wr, and Pw/Wr is denoted by L, the wheel satisfies the expression L ? 0.0223?-1.363. Where, the angle ? is 90° or less.

Abstract: According to an embodiment, there is provided that processing circuitry configured to determine a first radiation timing at which a subject is irradiated with an X-ray, based on information on motion of an object in X-ray image data, the information on motion being calculated by the X-ray image data, the X-ray image data being associated with an electrocardiographic waveform of the subject, and repeatedly irradiate the subject with an X-ray at the first radiation timing per cycle of the electrocardiographic waveform of the subject.

Abstract: An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, image generating circuitry, and processing circuitry. The X-ray tube emits X-rays. The X-ray detector detects X-rays emitted from the X-ray tube and transmitted through a subject. The processing circuitry receives a designating operation related a display mode for a target that is at least one of a region of the subject and an object inserted in the subject. In response to the designating operation, the processing circuitry changes the display mode of the target in an X-ray projection image that is based on a detection result of the X-ray detector, the display mode being changed based on three-dimensional medical image data related to the subject.

Abstract: A zoom lens includes: a first lens group having negative refractive power on a most object side; and a positive lens group Pa having positive refractive power, a negative lens group N having negative refractive power, and a positive lens group Pb having positive refractive power that are arranged in this order from the object side and provided on an image side with respect to the first lens group.

Abstract: A wheel includes a boss, a rim, and a web. The rim includes a tread and a flange. The web connects the boss and the rim. When the wheel is viewed in its longitudinal section, the web has a linear plate-thickness center line that is inclined such that the plate-thickness center line approaches the flange side as it extends outward in a radial direction. When the wheel is viewed in its longitudinal section, an outer end of the plate-thickness center line is positioned between the flange and a center of the tread in an axial direction of the wheel.

Abstract: An X-ray diagnostic apparatus of an embodiment includes an input interface, and processing circuitry. The input interface accepts an input operation performed by an operator. The processing circuitry identifies a period in which periodic movement is small in an X-ray irradiation area. The processing circuitry determines irradiation start timing of an X-ray according to the period. The processing circuitry controls to perform X-ray irradiation of a relatively high dose in the determined irradiation start timing on condition that the input operation is being continued.

Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry is configured to acquire a plurality of time-series X-ray images of an object. The processing circuitry is further configured to extract a motion related component in each of the plurality of X-ray images. The processing circuitry is further configured to generate an emphasis processing image in which a moving target is emphasized in each of the plurality of X-ray images based on the extracted motion related component.

Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry specifies, before position alignment between a first X-ray image and a second X-ray image which is acquired with a device inserted, a device area candidate in the second X-ray image as a candidate of an area where the device appears. The processing circuitry performs the position alignment using first processing of removing the specified device area candidate or second processing of reducing a contribution of the specified device area candidate.

Abstract: An operation device comprises a detector configured to detect an operation on a virtual switch by an operator to operate an X-ray irradiation in an X-ray diagnosis apparatus, wherein the virtual switch is virtually set at a position settled relatively with respect to the operator and output circuitry configured to output a detection result of the operation detected by the detector to the X-ray diagnosis apparatus to be operated. This device eliminates the need for looking away from a display monitor every time the operator operates the X-ray diagnosis apparatus.

Abstract: An X-ray imaging apparatus according to an embodiment includes an X-ray generator, an X-ray detector, an input interface, and processing circuitry. The processing circuitry is configured to: display, on a display, an image based on X-rays detected by the X-ray detector; control, based on a first control signal according to the direction signal, a rotating mechanism of the arm so that the arm performs a first rotation; and control, in response to an end of the first rotation, based on a second control signal, the rotating mechanism so that the arm performs a second rotation which returns the arm toward a position before the first rotation, the position being stored in a memory circuit.