Abstract: Provided are a three-dimensional X-ray CT apparatus, a three-dimensional CT image reconstruction method, and a program, which are capable of reducing an operating time. A three-dimensional X-ray CT apparatus includes: a CT imaging portion for continuously and relatively rotating a measurement system with respect to a subject to perform a CT imaging measurement for taking data on a plurality of transmission images for reconstructing a three-dimensional CT image of the subject; and an image reconstruction portion for reconstructing the three-dimensional CT image based on the data on the plurality of transmission images taken by the CT imaging portion and displaying the three-dimensional CT image. During a period in which the CT imaging measurement is being performed, the image reconstruction portion reconstructs the three-dimensional CT image based on already-taken data on transmission images and displays the three-dimensional CT image before the CT imaging measurement is completed.

Abstract: There is provided an X-ray composite apparatus capable of performing, with one unit, X-ray CT and element analysis by fluorescent X-rays. The X-ray composite apparatus 100 includes an X-ray source 110 generating cone beam X-rays, a sample support 150 holding a sample S, collimator parts 130 and 140 capable of narrowing the cone beam X-rays to form parallel X-rays, depending on the intended use, between the X-ray source and the sample support 150, a two-dimensional detector 170 detecting the cone beam X-rays transmitted through the sample S, and a fluorescent X-ray detector 176 detecting fluorescent X-rays radiated from the sample S, and when the apparatus is used for X-ray CT, the apparatus irradiates the sample with the cone beam X-rays, while when the apparatus is used for fluorescent X-ray analysis, the apparatus irradiates the sample S with the parallel X-rays.

Abstract: A CT image processing device 5 which processes projection data in synchronization with a periodic motion of a portion of a subject includes an ROI calculation unit 36 which calculates specific information on an ROI for synchronization for each scanning angle so as to track the target portion of the subject. As a result, a strong synchronization signal is obtained, a characteristic amount in which breathing beat and heartbeat sufficiently appear can be measured, and simple synchronization processing is made possible by using the projection data. A dedicated device for obtaining the heartbeat or breathing beat such as ECG and a respiratory measuring device is not required, and a heartbeat signal and a breathing beat signal can be obtained from an ROI signal of the projection data. As a result, blurring on an image caused by the heartbeat can be eliminated, and an image quality is extremely improved.

Abstract: A switching device includes an input stage switch group 1-1 including a plurality of input lines, an output stage switch group 1-3 including a plurality of output lines, an intermediate stage switch group 1-2 arranged between the input stage switch group and the output stage switch group, and a scheduler 1-22 deciding a signal path of each of intermediate stage switches 1-21 in the intermediate stage switch group based on information input to the respective input lines. The intermediate stage switch group is divided into a plurality of groups, a plurality of the schedulers is arranged in a distributed fashion to correspond to the plurality of groups, respectively and the schedulers operate independently of one another.

Abstract: A CT data processing apparatus and a CT data processing method capable of separating a subcutaneous fat region from a visceral fat region accurately and efficiently in CT data are provided.

Abstract: A switching device includes an input stage switch group 1-1 including a plurality of input lines, an output stage switch group 1-3 including a plurality of output lines, an intermediate stage switch group 1-2 arranged between the input stage switch group and the output stage switch group, and a scheduler 1-22 deciding a signal path of each of intermediate stage switches 1-21 in the intermediate stage switch group based on information input to the respective input lines. The intermediate stage switch group is divided into a plurality of groups, a plurality of the schedulers is arranged in a distributed fashion to correspond to the plurality of groups, respectively and the schedulers operate independently of one another.

Abstract: A CT data processing apparatus and a CT data processing method capable of separating a subcutaneous fat region from a visceral fat region accurately and efficiently in CT data are provided.

Abstract: Inputted packets are sorted into flows and a minimum guaranteed transmission band is set up for each flow. When a back pressure signal for limiting a supply of packets to an output port is generated, in each flow containing the packets to be supplied to the output port, if the input rate of the packets contained in that flow is equal to or less than a rate corresponding to the minimum guaranteed transmission band set in the flow, the packets contained in the flow is supplied to the output port at the same output rate as the input rate, and otherwise, the packets contained in the flow is supplied to the output port at an output rate corresponding to the minimum guaranteed transmission band set in the flow.

Abstract: A diagnostic X-ray system has an X-ray source that generates an X-ray conical beam, and a panel detector, which has numerous X-ray detection elements arrayed two-dimensionally, opposed to each other so that they can be rotated about the body axis of a subject. CT images of the subject are reconstructed based on projection data acquired by scanning the subject. The panel detector can be offset so that the center of the detecting surface of the panel detector extending in a direction perpendicular to the body axis can be displaced in a direction substantially perpendicular to a reference plane defined with an extension of a straight line linking the focal point of X-rays and a point on the body axis of the subject and with the body axis of the subject.

Abstract: An object of the present invention is to realize a radiotherapeutic system whereby the process from the stage of making a diagnosis of a body to be examined for obtaining information of position, size, shape etc. of the diseased part and making up a therapeutic plan of such items as the area to be irradiated by a radiation to the stage of positioning of the area to be irradiated on the body being examined and applying the radiation to the body can be reasonably executed with little trouble.