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Multifocal spiral CT parallel re-constructive system

A spiral and image reconstruction technology, applied in the field of image systems, can solve problems such as not considering the characteristics of data, and achieve the effect of meeting the requirements of data volume and calculation volume and fast speed

Inactive Publication Date: 2007-11-21
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] After searching the literature of the prior art, it was found that the Chinese invention patent (application number 200510103153.X) proposed a CT parallel reconstruction technology, but this method is only for the single-source CT reconstruction system, and does not consider the simultaneous acquisition of multiple X-ray sources The characteristics of the data under the condition

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Embodiment Construction

[0017] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0018] As shown in FIG. 1 , the embodiment adopts the scanning mode of the three-source helical cone-beam CT, and there are three computing cluster modules to respectively process the projection data collected from the three flat-panel detectors. The reconstruction system of the present invention includes two parts: a multi-source frame scanning module and an image reconstruction module.

[0019] The multi-source rack scanning module includes three X-ray sources, and each X-ray source corresponds to a collimator and an X-ray detector. The X-rays emitted by the X-ray source pass through the...

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Abstract

The invention parallel reconstruction system for multisource helix CT, includes two modules: the multisource stand scanning module and the image reconstruction module. The multisource stand scanning module uses the scanning structure that the number of 2N+1 of X ray sources rolling synchronously, collects the projection data sending to the image reconstruction module; the image reconstruction module uses exactitude reconstruction arithmetic of multisource helix CT, the single computing assembly module uses the projection data reconstruction of the single X ray source to compute the intermediate result, the computer conforms and reset to get the result, stores the result and display output.

Description

technical field [0001] The present invention relates to an image system used in the technical field of biomedical image processing, in particular to a multi-source helical CT parallel reconstruction system that uses multiple processing units to realize multi-source helical CT imaging in parallel. Background technique [0002] The working principle of multi-source spiral CT is as follows: 2N+1 X-ray tubes are symmetrically installed in the same gantry. When the gantry rotates, the examination table carrying the object to be measured moves linearly along the direction perpendicular to the gantry. . At this time, if the object to be measured is observed as a reference system, the trajectory of 2N+1 X-ray tubes is 2N+1 helical lines. The X-rays emitted from the X-ray source pass through the measured object and are collected by the opposite detector to obtain the projection data required for reconstruction. Since 2N+1 detectors corresponding to 2N+1 X-ray sources simultaneously...

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Application Information

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IPC IPC(8): A61B6/03H05G1/02
Inventor 金燕南赵俊庄天戈
Owner SHANGHAI JIAO TONG UNIV
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