Abstract: 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.

Abstract: The thrust force of a sun gear is supported by a first thrust bearing that supports a first output shaft in the direction of an axis thereof. The thrust force of a ring gear is supported by a second thrust bearing that supports a second output shaft in the direction of the axis.

Abstract: 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 proposed and disclosed. The standard observational X-ray CT image is defined as a view image that shows an interested area of a dental arch of an object to be examined designated by an operator such as a dentist or assistant, which is seen in a direction substantially normal to a curve of the dental arch of the object through its cheek side to its tongue side, and such view is similar to an X-ray panoramic image familiar to them in usual diagnostics and is produced from X-ray CT data of the maxillofacial area of the object by addition to a specified image processing to the X-ray CT data, using a dental arch reference information prepared in advance and displayed on a display means for diagnostics.

Abstract: An X-ray CT apparatus which executes a first X-ray tomography on a sectional plane having a desirable thickness in an object to be examined (0) with the object interposed between an X-ray generator (1) and a two-dimensional X-ray image sensor (2) provided so as to hold their mutual facing positional relation, and also executes a second X-ray tomography for obtaining a CT image of the interested area of the object (0). The first X-ray tomography is executed on the object (0) while the object (0) is held and fixed by an object holder (4) with the center of the orbit of the X-ray circulating radiation fixed, and while the object holder (4) is moved by an object mover (5) along the X-ray sectional image forming path according to the rotary angle of the X-ray circulating radiation.

Abstract: The present invention provides a maintenance support system for a construction machine that allows a components maintenance schedule to be accurately established. The system 1 calculates the cumulative load of every component corresponding with the driving and working conditions of the construction machine 3 by means of the load calculation means 13 after simulating the driving and working conditions on the basis of production operating conditions by means of the operation simulation means 12, and forecasts the lifespan of the respective components by means of the lifespan calculation means 14 on the basis of the cumulative load. Hence, a more accurate maintenance schedule can be established in comparison with a case where which component is to be maintained is determined on the basis of only the operating time as in the prior art. The possibility of an unexpected component anomaly occurring at an earlier stage than the predetermined lifespan can therefore be reduced.

Abstract: There is provided a new X-ray imaging apparatus by the use of which X-ray CT and panoramic imaging can be effectively performed. In an X-ray imaging apparatus which rotates an X-ray generating section and an X-ray detecting section around an imaging object arranged between these X-ray generating section and the X-ray detecting section and also detects in the X-ray detecting section X-rays having been radiated from the X-ray generating section and transmitted through the imaging object to form an X-ray image, a panoramic imaging mode in which the X-ray generating section and the X-ray detecting section are driven to form a panoramic image of the imaging object and an offset scan/CT mode in which the X-ray generating section and the X-ray detecting section are driven to form a tomographic image of the imaging object are set, so as to selectively execute these two imaging modes.

Abstract: An automatic exposure control method for an image produced on a solid-state image sensing device in which intensity of radiation light irradiated to an object to be examined from a radiation source is feedback controlled. The solid-state image sensing device comprises a picture element producing part where electric charges generated by way of photo-electric conversion when receiving exposure, and a dark current measuring part where a dark current is generated and stored without receiving exposure.

Abstract: A two dimensional image production method by using a solid-state image sensing device, wherein the solid-state sensing device comprises a picture element producing part where electric charges generated by way of photo-electric conversion when receiving exposure is stored as charge signals, and a dark current measuring part where a dark current is stored without receiving exposure. The method comprising the steps of: preparing and storing in advance the output ratio data for a fixed exposure time between dark current component of each pixel element or each pixel element column in the picture element producing part and that of a specified pixel element or a specified pixel element column in the dark current measuring part, and producing sequentially pixel datum removed a dark current component while performing radiography, by executing a predetermined arithmetic operation for the signals of the electric charges outputted from the picture element producing part depending on the output ratio data.

Abstract: An X-ray computer tomography apparatus wherein a conical X-ray beam is radiated on a local area of an object while a rotary means with an X-ray generator and a two-dimensional X-ray image sensor faced to each other is rotated relative to the object which is disposed between the X-ray generator and the two-dimensional X-ray image sensor.

Abstract: An X-ray detector for use in a medical X-ray imaging apparatus comprising a rotary means rotatable relative to an object to be examined, an X-ray generator provided at one side of the rotary means, and an X-ray detecting portion provided at the other side of the rotary means so as to face the X-ray generator. The X-ray detector is provided in the X-ray detecting portion or is detachably mounted in the X-ray detecting portion, the X-ray detector is provided with an imaging portion comprised of a plane electric imaging means extending in a two-dimensional direction used for X-ray CT and has an imaging portion positioning means for moving up and down the imaging portion in the X-ray detector.

Abstract: Helical teeth are provided on surfaces of a pinion gear, a ring gear and a sun gear, and ring gear is arranged on a concentric axis with sun gear in a relatively rotatable manner. The helical teeth of pinion gear engage with both helical teeth of sun gear and ring gear. Carrier is arranged on the concentric axis with sun gear in a rotatable manner relative to sun gear and ring gear, and supports pinion gear in a rotatable manner. With a structure of ring gear sandwiching carrier and ring gear with a first sidewall portion and a second sidewall portion provided to extend inwardly in a radial direction, a thrust reaction force generated to perform a differential limitation function can be held without providing a housing to cover ring gear from the outside. With this, downsizing of a limited slip differential device can be attained.

Abstract: An automatic exposure control method for an image produced on a solid-state image sensing device in which intensity of radiation light irradiated to an object to be examined from a radiation source is feedback controlled. The solid-state image sensing device comprises a picture element producing part where electric charges generated by way of photo-electric conversion when receiving exposure, and a dark current measuring part where a dark current is generated and stored without receiving exposure.

Abstract: A two dimensional image production method by using a solid-state image sensing device, wherein the solid-state sensing device comprises a picture element producing part where electric charges generated by way of photo-electric conversion when receiving exposure is stored as charge signals, and a dark current measuring part where a dark current is stored without receiving exposure. The method comprising the steps of: preparing and storing in advance the output ratio data for a fixed exposure time between dark current component of each pixel element or each pixel element column in the picture element producing part and that of a specified pixel element or a specified pixel element column in the dark current measuring part, and producing sequentially pixel datum removed a dark current component while performing radiography, by executing a predetermined arithmetic operation for the signals of the electric charges outputted from the picture element producing part depending on the output ratio data.

Abstract: An X-ray CT apparatus which executes a first X-ray tomography on a sectional plane having a desirable thickness in an object to be examined (O) with the object interposed between an X-ray generator (1) and a two-dimensional X-ray image sensor (2) provided so as to hold their mutual facing positional relation, and also executes a second X-ray tomography for obtaining a CT image of the interested area of the object (O), wherein the first X-ray tomography is executed on the object (O) while the object (O) is held and fixed by an object holding means (4) with the center of the orbit of the X-ray circulating radiation fixed, and while the object holding means (4) is moved by an object moving means (5) along the X-ray sectional image forming path according to the rotary angle of the X-ray circulating radiation.

Abstract: An X-ray computer tomography apparatus wherein a conical X-ray beam is radiated on a local area of an object while a rotary means with an X-ray generator and a two-dimensional X-ray image sensor faced to each other is rotated relative to the object which is disposed between the X-ray generator and the two-dimensional X-ray image sensor.

Abstract: An X-ray object positioning apparatus for use in X-ray imaging apparatus which irradiates X-rays an object to be examined to produce an X-ray absorption coefficient of a desired region of the object by means of X-rays transmitted through the object. The X-ray object positioning apparatus comprises a chair for fixing and holding the object; an imaging position moving apparatus for relatively moving an X-ray imaging target area relative to the fixed object chair; and display for variably showing the relative positional relation between an object model corresponding to the object and an imaging target area index corresponding to the X-ray imaging target area.

Abstract: An X-ray object positioning apparatus for use in X-ray imaging apparatus which irradiates X-rays an object to be examined to produce an X-ray absorption coefficient of a desired region of the object by means of X-rays transmitted through the object. The X-ray object positioning apparatus comprises an object fixing means for fixing and holding the object; an imaging position moving means for relatively moving an X-ray imaging target area relative to the fixed object on the object fixing means; and display means for variably showing the relative positional relation between an object model corresponding to the object and an imaging target area index corresponding to the X-ray imaging target area.

Abstract: A power transmission system for a four-wheel drive vehicle, comprising a differential mechanism having a torque sensing type differential limiting function. Further comprised are: a torque distribution mechanism for transmitting the torque to a front-wheel drive shaft connected to the front wheels or a rear-wheel drive shaft connected to the rear wheels; a first selective coupling mechanism for coupling the torque distribution mechanism selectively to one of two output elements of the differential mechanism; and a second selective coupling mechanism for coupling an input member and one of the output members, when the first selective coupling mechanism releases the coupling between the torque distributing mechanism and the front-wheel or rear-wheel side drive member, to integrate the differential mechanism as a whole thereby to establish a two-wheel drive state.

Abstract: An X-ray device for generating a panoramic tomogram is designed so that a revolving arm can move between a first position, where an X-ray generator and an X-ray receiver that are both supported by the revolving arm oppose each other through the head of a patient positioned in a patient positioning station, and a second position, where an operator of the X-ray device can look at the patient's head from a side view, thereby allowing the operator to properly position the patient in the patient positioning station. The incorporation of a second X-ray receiver additionally allows for the generation of a cephalogram. The incorporation of a blind prevents the patient from visually or physically interacting with selected components of the apparatus.

Abstract: To enhance the controllability of input operation of radiographic conditions, allowing to select the desired radiographic mode easily out of multiple radiographic modes.An operation panel 19 is provided in a patient frame 3 which incorporates a chin rest for holding the head of a patient, and this operation panel 19 comprises display means 63 for displaying the radiographic conditions, and input means 64 for entering the radiographic conditions. The input means 64 further comprises plural keys 52, 55 to 61, 66 to 69 for selecting radiographic modes, up and down cursor keys 70, 71 for selecting plural setting conditions corresponding to a selected radiographic mode, and left and right cursor keys 72, 73 for setting parameters of every setting condition. In a display unit 51 of the display means 63, there are display regions 130, 131, 132 for radiographic mode, setting conditions and parameters, respectively.