摘要:
A radiographic image capturing apparatus includes a radiation source that outputs radiation, a radiation detector for detecting the radiation and converting such radiation into a radiographic image, and a reference point, which is disposed in a removable manner between the radiation source and the radiation detector. The reference point is disposed at the position of a center of rotation of the radiation source, which is set between the radiation source and the radiation detector. By rotating the radiation source about the position of the center of rotation, the radiation source applies radiation with respect to the reference point from at least two different angles.
摘要:
In a radiographic image capturing apparatus, an object to be examined is compressed and secured between a compression plate and an image capturing base, at a position off-center from a central position of the image capturing base near a subject in a direction along the subject. An opening is defined in the compression plate so as to confront the object to be examined in the off-center position. The radiation source irradiates the object to be examined as well as the opening with radiation from a central angle of the radiation source, which is aligned with a vertical axis of the image capturing base, and which passes through the central position from a predetermined angle that is angularly spaced from the central angle about the central position.
摘要:
In a radiographic image capturing apparatus, a biopsy region positional information calculator calculates a three-dimensional position of a biopsy region in an object to be examined based on two radiographic images which are acquired in a stereographic image capturing process, an irradiated field calculator calculates a new irradiated field covering the biopsy region based on the calculated three-dimensional position of the biopsy region and two angles at which a radiation source is disposed in the stereographic image capturing process, and a collimator controller controls a collimator to change the irradiated field of the radiation to the new irradiated field in a next stereographic image capturing process.
摘要:
In a radiographic image capturing apparatus, a biopsy region positional information calculator calculates a three-dimensional position of a biopsy region in an object to be examined based on two radiographic images which are acquired in a stereographic image capturing process, an irradiated field calculator calculates a new irradiated field covering the biopsy region based on the calculated three-dimensional position of the biopsy region and two angles at which a radiation source is disposed in the stereographic image capturing process, and a collimator controller controls a collimator to change the irradiated field of the radiation to the new irradiated field in a next stereographic image capturing process.
摘要:
The invention relates to a radiation image capturing apparatus that includes a signal reading circuit for reading an image signal from a sensor substrate. The signal reading circuit includes a charge detecting circuit and a temperature sensor for detecting the temperature of the charge detecting circuit, and controls the gain of a variable gain amplifier of the charge detecting circuit based on the detected temperature.
摘要:
A radiation image capturing apparatus includes a housing for housing a radiation detector. The housing has a wall inclined with respect to a detection surface of the radiation detector, and the wall defines a space inclined with respect to the detection surface. The space allows heat transfer medium such as air of relatively high temperatures (higher than that of outside air, for example) to rise along a slope defined by the space. If the region around the detection surface is heated to high temperatures, airflow is generated within the space, forcing the relatively high-temperature heat transfer medium away from the vicinity of the radiation detector, thereby allowing the whole radiation detector to be cooled in a uniform manner.
摘要:
Amplifiers are mounted on flexible boards connected to a solid-state detector. A first temperature adjustment member is disposed near one of the surfaces of the amplifiers and the flexible boards, and a second temperature adjustment member is disposed near the other surface of the flexible boards. The first temperature adjustment member adjusts the temperature of the amplifiers themselves, and prevents heat from being transferred from the one of the surfaces of the flexible boards to the solid-state detector. The second temperature adjustment member prevents heat from being transferred from the other surface of the flexible boards to the solid-state detector.
摘要:
A biopsy apparatus includes a biopsy region positional information calculator for calculating a three-dimensional position of a biopsy region, a biopsy needle moving mechanism for moving a biopsy needle along three axes and/or turning the biopsy needle obliquely to an object to be examined, a biopsy needle positional information calculator for calculating a three-dimensional position of the biopsy needle, and a traveled distance calculator for calculating a distance over which the biopsy needle moves with respect to the biopsy region based on the three-dimensional position of the biopsy needle and the three-dimensional position of the biopsy region.
摘要:
A radiation image capturing apparatus includes a conductive gel member disposed between a radiation detector and an integrated circuit provided in vicinity of the radiation detector and electrically connected thereto. The conductive gel member blocks the electromagnetic noise generated by the integrated circuit and thereby prevents the electromagnetic noise from propagating to the radiation detector. As a result, the electrical signals generated by the radiation detector are prevented from being affected by the electromagnetic noise and high-quality radiation images can be acquired.
摘要:
An irradiation dose calculator calculates a pre-exposure-mode-required irradiation dose using the thickness of a breast which measured by a thickness measuring unit, as a parameter, and the irradiation time of a pre-exposure mode is controlled to apply a radiation to the breast in the pre-exposure mode. According to the dose of the radiation detected by a dose detecting sensor in the pre-exposure mode, the irradiation dose calculator calculates a main-exposure-mode-required irradiation dose, and the irradiation time of a main exposure mode is controlled to apply the radiation to the breast in the main exposure mode, thereby capturing a radiation image of the breast.