Canon Kabushiki Kaisha

Kazuaki Umekawa

Shimpei Tezuka

Hiroshi Itoh

Akehiko Uchiyama

Wataru Sakagawa

Tomoyuki Ikegami

Satoshi Kamei

A radiation imaging apparatus includes a pixel array including, in an imaging region where a plurality of pixels is arranged in a matrix, a detection pixel group in which a plurality of detection pixels is arranged in a row direction, and a control unit configured to control imaging. A grid having a stripe structure in which a radiation transmissive layer and a radiation absorption layer that are strip-shaped and extend in a first direction are alternately arranged in a second direction is disposed and can be used in the radiation imaging apparatus. The radiation imaging apparatus further includes a determination unit configured to determine whether a mode in which the imaging using signals from the detection pixel group is controlled is executable by the control unit, based on information about an angle between the row direction and the first direction.

Radiation imaging apparatus, radiation imaging system, and control method of radiation imaging apparatus

A radiation imaging apparatus comprising a detection unit in which a plurality of pixels are arranged, a communication unit configured to receive a control signal including an imaging mode for acquiring a radiation image by the detection unit and a controller is provided. The controller operates the detection unit in an imaging mode corresponding to the control signal if an imaging instruction is received in a first state in which a state of communication is normal, operates the detection unit in an abnormal imaging mode set in advance if the imaging instruction is received in a second state in which the state of communication is not normal, and operates the detection unit so as to acquire offset image data for an imaging mode different from the abnormal imaging mode while radiation irradiation is not performed in the second state.

Radiation imaging apparatus, radiation imaging system, control method of radiation imaging apparatus, and non-transitory computer-readable storage medium

A radiation imaging system comprising a radiation imaging apparatus in which pixels are arranged, a radiation source, a display unit, and a controller is provided. The controller causes, during radiation irradiation, the radiation imaging apparatus to repeat a generation operation of generating one image data by causing the pixels to perform an accumulating operation and a readout operation. When it is instructed to terminate the radiation irradiation, the controller causes the radiation source to stop the radiation irradiation in accordance with completion of the accumulating operation and the readout operation of the last row in the generation operation during which it was instructed to terminate the radiation irradiation, and causes the display unit to display an image based on last image data generated by the generation operation during which it was instructed to terminate the radiation irradiation.

Radiation imaging system

Provided is a technology with which defective pixel information in taking a radiation image and defective pixel information in detecting a dose can be generated efficiently. Provided is a radiation imaging apparatus including: a plurality of pixels arranged to convert radiation into an electric signal; and a generation unit configured to generate, based on the electric signal obtained as a result of a conversion by the plurality of pixels, first defective pixel information indicating a defective pixel in taking a radiation image among the plurality of pixels, and second defective pixel information indicating a defective pixel in detecting a dose among the plurality of pixels.

Radiation imaging system comprising radiation imaging apparatus configured to indicate a defective pixel and method of controlling radiation imaging apparatus

A radiation imaging apparatus acquires image data by detecting radiation emitted by a radiation generation apparatus, manages a time in the radiation imaging apparatus, generates a synchronization control message to be transmitted to synchronize a time managed by an irradiation control apparatus configured to control radiation irradiation by the radiation generation apparatus with the managed time, and transmits the image data and the synchronization control message, wherein the synchronization control message is transmitted with priority over the image data.

Radiation imaging apparatus, method of controlling radiation imaging apparatus, radiation imaging system, and non-transitory computer-readable storage medium

A radiation imaging apparatus that forms a part of a radiation imaging system is provided. The apparatus includes a sensor unit having a conversion element configured to convert radiation into charges and a switch element configured to transfer the charges. The sensor unit is configured to obtain a radiation image in accordance with radiation that enters the conversion element. The apparatus further includes a control unit configured to control the sensor unit so as to perform one of a plurality of operations. The plurality of operations includes an imaging waiting operation of repetitively switching ON/OFF the switch element, and a standby operation of controlling so as to make a change amount of voltage for controlling the switch element smaller than that of the imaging waiting operation. The control unit executes the standby operation based on a predetermined signal from outside.

Radiation imaging apparatus, method of controlling the same, and radiation imaging system

Provided is an ophthalmologic apparatus capable of executing accurate automatic alignment even for an eye having an intraocular lens (IOL) implanted therein. The ophthalmologic apparatus includes: an optical system including a light beam projecting unit for projecting a light beam to an eye to be inspected, and a light receiving unit for receiving a reflection light beam from the eye to be inspected; a detecting unit for detecting a plurality of bright spot images from the reflection light beam received by the light receiving unit; and a calculating unit for calculating an alignment status between the eye to be inspected and the optical system based on the detected plurality of bright spot images. The ophthalmologic apparatus is further provided with a selection unit for selecting bright spot images to be used for the calculation by the calculating unit, from among the plurality of bright spot images.

Ophthalmologic apparatus and alignment method

Provisioned is a selecting unit configured to select a bright spot image corresponding to a reflected light beam reflected by the cornea of the subject eye from among a plurality of bright spot images on the basis of a positional relationship between a first bright spot image formed from a plurality of bright spot images corresponding to a first light beam in a first direction and a second bright spot image corresponding to a second light beam in a second direction different than the first direction, and a calculating unit configured to calculate a state of alignment between the subject eye and a measuring unit using the bright spot image selected from the first bright spot images.

Ophthalmic device, control method, and non-transitory computer readable medium

An ophthalmic apparatus comprises an imaging unit configured to capture an anterior eye part image of an eye to be examined, a measuring unit configured to measure unique information of the eye, a calculation unit configured to calculate variations of a plurality of pieces of unique information measured by the measuring unit, and a display control unit configured to cause a display unit to display a plurality of anterior eye part images respectively corresponding to the plurality of pieces of unique information when variations calculated by the calculation unit satisfy a predetermined condition.

Ophthalmic apparatus and storage medium

An ophthalmologic apparatus includes a projection unit configured to project a light flux to a subject's eye, an imaging optical system configured to form an image of the light flux reflected by the subject's eye or an image of the subject's eye on an imaging plane, an imaging unit provided on the imaging plane of the imaging optical system, a determination unit configured to determine a parameter regarding the imaging unit or the projection unit for acquiring unique information of the subject's eye based on a physical property of the subject's eye, and an acquisition unit configured to acquire the unique information based on the image of the light flux or the image of the subject's eye captured by the imaging unit with use of the determined parameter.

Ophthalmologic apparatus, ophthalmologic control method, and program

Provided is an ophthalmologic apparatus that can perform the alignment of an acquiring unit with respect to an eye to be inspected without a rotation operation so that operability can be improved. The ophthalmologic apparatus includes: an acquiring unit which acquires specific information of an eye to be inspected; a joystick which can perform a rotation motion for moving the acquiring unit in an up-down direction, a left-right tilting motion for moving the acquiring unit in a left-right direction with respect to the eye to be inspected, and a front-back tilting motion for moving the acquiring unit in a front-back direction with respect to the eye to be inspected; and a control unit which changes a motion for moving the acquiring unit in the up-down direction from the rotation motion to the front-back tilting motion.

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Machida, Japan

Kazuaki Umekawa