J. Morita Manufacturing Corporation

Kabushiki Kaisha Morita Seisakusho

J. Morita Mfg. Corporation

Nihon University

Takahiro Yoshimura

Masakazu Suzuki

Tomoyuki Sadakane

Makoto Honjo

Masanori Otsuka

Hideki Yoshikawa

Keisuke Mori

Yoshinori Arai

Kazuo Nishikawa

Yoshito Sugihara

Kozo Nakano

Eiichi Arai

Masanobu Yoshida

Kouichi Sonobe

Yutaka Ito

Takeshi Hayashi

Sho Matsushita

Akifumi Tachibana

Takao Makino

Minoru Watanabe

Kazuyuki Fujita

Masato Wada

Yoshiaki Iwato

Keisuke Mork

Kohzo Nakano

Takeshi Kusunoki

Takashi Bessho

An object of the present invention is to prevent an X-ray generator and an X-ray detector that turn around a subject from contacting with the subject. An X-ray CT imaging apparatus includes a turning support that supports an X-ray generator and an X-ray detector, a turning drive mechanism including a turning mechanism and a turning axis moving mechanism, an imaging region position setting unit that receives a setting of a position of an imaging region to a local part of a dental arch of a head, and a turning controller. The position of the mechanical turning axis Xis controlled according to the position of the imaging region set by the imaging region position setting unit.

X-ray CT imaging apparatus and method of controlling X-ray CT imaging apparatus

An X-ray CT imaging apparatus includes: a supporter that is supported such that an X-ray generator and an X-ray detector are opposed to each other; a turning motor that turns the supporter about a shaft; a crosswise drive motor that moves the shaft in a crosswise direction; and a circuit that performs processing of controlling the turning motor and the crosswise drive motor and processing of setting the physique of a subject. When X-ray CT imaging is performed, the crosswise drive motor moves the shaft in synchronization with turning of the supporter about the shaft, and the supporter is caused to perform combined motion, which allows the X-ray generator and the X-ray detector to turn about a center of an X-ray CT imaging region, and position control of the shaft is performed according to the size of the physique of the subject.

X-ray CT imaging apparatus

An X-ray CT scanner generates CT imaging information on an imaging region, and has a revolution arm positioning an X-ray generator and an X-ray detector to face one another with a subject therebetween, directing the revolution arm to move so X-ray beam radiation is offset from the center of the imaging region. An axial direction changing mechanism changes an imaging target from a first imaging region to a second imaging region in an axial direction of the imaging central axis, and a controller controls offset CT imaging, and an X-ray imaging information generator to generate first and second CT imaging information based on projection data of the first and second imaging region and to generate a stitch imaging information comprising the first and second CT imaging information.

X-ray CT scanner, X-ray image processor, and X-ray image display

When X-ray CT imaging is performed with a part located close to a front of a head as the imaging region, using the turning mechanism and the distance changing mechanism, the turning controller causes the X-ray generator and the X-ray detector to turn around the head while locating the imaging region therebetween, and causes the X-ray detector to turn along a go-around orbit, in which the X-ray detector comes close to the imaging region with respect to a front side of the head and moves away from the imaging region with respect to a rear side, by changing a distance between the X-ray detector and the center of the imaging region.

A medical X-ray photographing apparatus includes a support configured to hold the X-ray generator and the X-ray detector in a facing state, a base body (support holder) configured to rotatably hold the support on a side opposite to a position where the X-ray generator and the X-ray detector are provided, and a turning driver configured to drive and turn the support about a turning axis. The medical X-ray photographing apparatus also includes a center-direction setting part configured to set a center direction passing through a center of a swing angle of the support in X-ray photography and a turning controller configured to control the turning driver such that the support turns with a swing angle around the center direction set by the center-direction setting part.

Medical X-ray photographing apparatus and X-ray photographing method

A medical X-ray CT photography apparatus body includes a turning arm that supports an X-ray generator and an X-ray detector while the X-ray generator and the X-ray detector are opposed to each other with the subject interposed therebetween, a bracket part that fixedly supports an axial center position of a turning shaft provided in the turning arm, and a support drive part that turns the turning arm about the turning shaft with respect to the bracket part. The medical X-ray CT photography apparatus body also includes a subject chair on which the subject sits, a chair moving mechanism that linearly moves the subject chair in a front-back direction (Y-axis direction) of the subject, and a main-body controller that performs the panoramic X-ray photography by controlling the chair moving mechanism and the support drive part in conjunction with each other.

Medical X-ray CT photography apparatus using positional shift based on rotation angle

In an X-ray imaging apparatus that performs X-ray CT imaging, an X-ray generator () that generates an X-ray cone beam (BX) and an X-ray detector () that detects the X-ray cone beam (BX) radiated to an object (specifically, image object (OB)) are revolved for 180 degrees to be opposed to each other with the object being located therebetween. Further, the X-ray generator () is moved such that a revolution reference point (CP) that is set on an optical path (CB) of the X-ray cone beam (BX) goes round of a predetermined oval shape while the X-ray detector () and the X-ray generator () are revolved for 180 degrees. Setting is made such that a CT image area (CA) to be imaged by the irradiation of the X-ray cone beam (BX) has an approximately triangular shape through the above-mentioned operation.

X-ray imaging apparatus

A medical X-ray apparatus comprising a supporting part for supporting an X-ray generator and a two-dimensional X-ray detector while interposing an object to be examined therebetween, a radiation area restricting part for restricting a radiation area of X-ray generated from the X-ray generator, and a scan driving part for scanning the object with the X-ray restricted by the radiation area restricting part as X-ray beam and for executing radiography. A direction intersecting with X-ray scan direction is defined as a height direction, the apparatus further comprises a radiation area setting part for setting at least one of both ends of width of the X-ray beam in the height direction at a desired position in accordance with the position of an interested area of the object; and the X-ray beam is irradiated only to the radiation area as set by the radiation area setting part with its beam width in height direction restricted by the radiation area restricting part.

Medical X-ray apparatus

In an X-ray CT imaging, an X-ray generator () and a two-dimensional X-ray detector () are opposed to each other between an object and are rotated by a rotary shaft () around the object. At least one of the rotary shaft supporter () and an object holder () includes a movement mechanism () for moving a supporter () for the X-ray generator and the X-ray detector relative to the object. In offset scan CT imaging, the rotation of the supporter by the rotary shaft is performed simultaneously with the relative two-dimensional movement of the rotary shaft by the movement mechanism. In the relative two-dimensional movement, the position of the rotary shaft is moved according to the rotary angle of the supporter along a circular orbit around the center of a CT imaging region in a plane crossing the rotary shaft. Thus, it becomes possible to image a larger region of interest of the object.

An X-ray CT imaging apparatus includes an X-ray generating section, an X-ray image capturing section, a supporting section, a holding section, a rotation driving section, and an X-ray controlling section, wherein the X-ray generating section generates an X-ray cone beam, the X-ray image capturing section detects the X-ray cone beam having passed through an object, the supporting section supports the X-ray generating section and the X-ray image capturing section with the object positioned therebetween, the holding section holds the object, the rotation driving section rotates the supporting section relatively to the object, and the X-ray controlling section alleviates an influence of a high X-ray absorption region, present inside the object, in the X-ray image capturing section by means of a control model formed based upon information on the high X-ray absorption region.

X-ray CT imaging apparatus and imaging control method therefor

An X-ray CT apparatus with a function of taking in an X-ray image data obtained by another X-ray apparatus, for use of scout view for a CT for local region of an object to be examined. The apparatus comprises an image data input means for taking in an X-ray image data as obtained by an X-ray detector of another X-ray apparatus by way of such as data importing, together with the attribute information thereon, a display operation means for displaying the X-ray image data as a scout view and receiving the operation of designating an interested area on the X-ray image; and a position control means for relatively moving the object to be examined, relative to the X-ray generator and the X-ray detector, in order to execute a CT for local region of the interested area of the object, based on the operation for the X-ray image displayed as the scout view with the display operation means or the attribute information.

X-ray CT apparatus

An x-ray CT imaging apparatus emits an x-ray cone beam to an object to generate an x-ray CT image on the basis of a transmission x-ray which is transmitted through the object. An image generation part generates an image obtained by superposing an imaging object region display on a position setting image representing the object and displays the image on a display part. The image generation part changes the imaging object region display in accordance with an x-ray CT imaging mode selected by an imaging mode selection part.

A method of displaying a standard observational X-ray CT image for diagnostics for use in an X-ray CT apparatus or an X-ray CT image display apparatus and an apparatus for displaying the same image are disclosed. The standard observational X-ray CT image can be displayed as a display image of at least one of an X-ray CT sectional image and a three-dimensional CT volume image depending on its purpose. The present method involves a step of designating the interested area with respect to the maxillofacial area of the object, a step of producing the standard observational X-ray CT image of the designated interested area, based on the dental arch reference information prepared in advance, and a step of displaying on a display means the standard observational X-ray CT image of the object thus produced.

Display method of X-ray CT image of maxillofacial area, X-ray CT apparatus and X-ray image display apparatus

A unit for X-ray CT imaging to be set in a panorama X-ray imaging apparatus having a cassette holder has a digital sensor cassette for CT imaging to be set in the cassette holder, includes a two-dimensional X-ray detector for acquiring X-ray projection data for CT imaging of an object, and a controller for controlling a timing of X-ray CT imaging, a radiation field of X-ray beam generated by the X-ray detector, and the rotary device. Alternatively, the unit has the digital sensor cassette for X-ray CT imaging, an image reconstructor which calculates to convert the X-ray projection data obtained with the two-dimensional X-ray detector to a distribution of X-ray absorption coefficients of the object and creates tomographic image data of sections of the object, and an image processor which sends and receives signals for X-ray CT imaging between the X-ray detector and the image reconstructor when the digital sensor cassette for CT imaging is set in the cassette holder.

Unit for X-ray CT imaging and X-ray imaging apparatus

An X-ray detecting section () comprises a first imaging means (S) to generate an X-ray image in response to the X-ray slit beam (B) and a second imaging means (S) to generate an X-ray image in response to the X-ray broad beam (BB). The radiography apparatus (M) displays a first X-ray image generated by the X-ray slit beam (B) and said first imaging means (S), specifies a desired interested area (R) on the first X-ray image, and generates a predetermined sectional image as a second X-ray image by using the X-ray broad beam (BB) and the second imaging means (S) with respect to the specified interested area (R).

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Kyoto, Japan

Takahiro Yoshimura