Title:
【発明の名称】コンピュータ断層撮影装置
Document Type and Number:
Japanese Patent JP3350154
Kind Code:
B2
Abstract:
A medical imaging apparatus includes a measurement unit with an x-ray source and a radiation detector rotatable around an examination subject to conduct a scan of the examination subject and thereby to obtain a data set, which is supplied to a computer. Within the computer, a shadowgraph of the examination subject is calculated in real time as the examination subject is displaced during the scan relative to the measurement unit. The data used to construct the shadowgraph are obtained at a selected projection angle, which is reached a number of times by the measurement unit during the scan. The shadowgraph is displayed in real time as well, to an extent correlated with the amount of relative displacement between the examination subject and the measurement unit. The shadowgraph can be calculated using a convolution equation, wherein the data are twice convolved, once in the longitudinal direction, i.e., the direction of displacement between the examination subject and the measurement unit, and once in a direction corresponding to the direction along which the radiation detector extends. A standard computer tomogram can also be calculated from the same data set from which the data for calculating the shadowgraph are selected.
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Inventors:
Lutz Gunder
Application Number:
JP15340293A
Publication Date:
November 25, 2002
Filing Date:
June 24, 1993
Export Citation:
Assignee:
Siemens Aktiengesellschaft
International Classes:
A61B6/02; A61B6/03; A61B6/04; G06T7/00; H05G1/60; (IPC1-7): A61B6/03
Domestic Patent References:
| JP4292149A |
Attorney, Agent or Firm:
Toshio Yano (2 outside)