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Chromatographing X-ray image forming apparatus of computer

An imaging device, X-ray technology, applied in echo tomography, measuring device, X/γ/cosmic radiation measurement, etc.

Inactive Publication Date: 2008-08-06
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Another problem encountered is that the examination region of the patient of interest is larger than the volume that can be scanned by a circular trajectory

Method used

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  • Chromatographing X-ray image forming apparatus of computer
  • Chromatographing X-ray image forming apparatus of computer
  • Chromatographing X-ray image forming apparatus of computer

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Experimental program
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Embodiment Construction

[0025] figure 1 The computed tomography apparatus shown in includes a gantry 1 which is rotatable about a rotation axis 14 extending parallel to the z-direction. For this purpose, the gantry is driven with a motor 2 at a preferably constant but adjustable angular velocity. A radiation source S, for example an X-ray tube, is mounted on a gantry 1 . The X-ray source is provided with collimator means 3 which form a conical radiation beam 4 from the radiation produced by the X-ray source. The radiation beam 4 traverses a patient (not shown) within the cylindrical examination zone 13 . After traversing the examination zone 13 , the X-ray beam 4 is incident on a two-dimensional detector unit 16 mounted on the gantry 1 .

[0026] Then the angular aperture α of the radiation beam 4 max (the aperture angle is defined as the angle enclosed by a ray of the beam 4 lying at the edge of the x-y plane with respect to a plane defined by the radiation source S and the axis of rotation 14) ...

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PUM

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Abstract

Computer tomograph has a conical radiation beam that is moved in a helical examination path with a significant overlapping between the individual helices of the examination path. In order to select the best data from amongst the redundant data, a heat movement detection and signaling device is provided. The recorded CT data is correlated with the movement data and the data selected from the times at which there was minimum heart movement. <??>An Independent claim is made for a CT method for recording and selecting CT data so that data is chosen corresponding to the periods of minimum heart movement.

Description

technical field [0001] The present invention relates to a computed tomography device and a computed tomography method. Background technique [0002] The computed tomography device includes [0003] - a scanning unit with a radiation source and a detector unit connected to the scanning unit in order to detect the conical beam of radiation emitted by the radiation source as it passes through the patient examination area between the radiation source and the detector unit After the passage is carried out, [0004] - a drive unit for generating a helical relative movement about the axis of rotation between the scanning unit and the patient, and [0005] - a reconstruction unit for reconstructing a three-dimensional (3D) image data set of the examination area, from the measurement data acquired by the detector unit within the detector window defined by the helix, the radiation source to the detector window two The line connecting the two edges is offset relative to each other i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03G01T1/161A61B6/00
CPCA61B6/541A61B6/032A61B6/027
Inventor R·普罗克萨
Owner KONINK PHILIPS ELECTRONICS NV