Computer tomography unit and method for operating same
First Claim
1. A computed tomography unit comprising:
- a radiation source which emits a pyramid-shaped X-ray beam from a focus adapted to penetrate an examination subject;
an arrangement for rotating said focus continuously around said examination subject;
a radiation detector on which said X-ray beam is incident after passing through said examination subject, said X-ray source and said radiation detector thereby scanning said examination subject with a portion of a surface of said examination subject, facing said X-ray source, having said pyramid-shaped X-ray beam penetrate therethrough; and
an optical recording device which, during said scanning, records an optical image of said portion of said surface.
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Accused Products
Abstract
In a computed tomography and a method for operating a computed tomography unit, in order to scan an object under investigation a radiation source emits a pyramid-shaped X-ray beam, which penetrates through the object under examination and strikes a radiation detector. The computer tomography unit has an optical recording device which, during the scanning, records optical images of a partial surface of the object, which faces the X-ray source and through which the pyramid-shaped X-ray beam has penetrated. An image of the surface of the object under examination is constructed from optical images obtained in this manner this image is assigned to a sectional image obtained by means of the scan, or to an overview image.
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Citations
7 Claims
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1. A computed tomography unit comprising:
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a radiation source which emits a pyramid-shaped X-ray beam from a focus adapted to penetrate an examination subject;
an arrangement for rotating said focus continuously around said examination subject;
a radiation detector on which said X-ray beam is incident after passing through said examination subject, said X-ray source and said radiation detector thereby scanning said examination subject with a portion of a surface of said examination subject, facing said X-ray source, having said pyramid-shaped X-ray beam penetrate therethrough; and
an optical recording device which, during said scanning, records an optical image of said portion of said surface. - View Dependent Claims (2, 3, 4, 5)
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6. A method for operating a computed tomography unit, comprising the steps of:
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scanning an examination subject by emitting a pyramid-shaped X-ray beam from a focus, which penetrates the examination subject, while rotating said focus continuously around the examination subject, and detecting X-rays from said X-ray beam after penetrating said subject with a radiation detector, said scan producing a scan image selected from the group consisting of a diagnostic image and an overview image, said scanning proceeding in a plurality of scanning steps;
recording an optical image of a portion of a surface of said examination subject penetrated by said X-ray beam for each scanning step;
constructing an image of a surface of said subject from a plurality of said optical images; and
assigning said image of said surface to a slice image obtained from said scanning. - View Dependent Claims (7)
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Specification