Missing data compensation method, computed tomography imaging method and system

A compensation method and tomography technology, applied in computerized tomography scanners, calculations, image data processing, etc., can solve problems such as detector dead areas and large gaps, expand imaging fields of view, expand effective detection areas, and suppress data truncation The effect of artifacts

Active Publication Date: 2018-02-23
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

In the back-end chip packaging, the connection between the chip and the lead frame provides a circuit connection for the distribution of power and signals, and wire bonding and other connection forms are used, so that there are large gaps when multiple chips are spliced, which will also cause detection. The "dead zone" problem of the device

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  • Missing data compensation method, computed tomography imaging method and system
  • Missing data compensation method, computed tomography imaging method and system
  • Missing data compensation method, computed tomography imaging method and system

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[0046]Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0047] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities m...

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Abstract

The invention provides a missing data compensation method, a computed tomography imaging method and system, applied to compensating missing data in a scanning blind area in computed tomography imagingand relates to the technical field of computed tomography (CT) imaging. The computed tomography imaging system comprises an X-ray source and an X-ray detector arranged opposite to each other, whereina center axis of the X-ray detector deviates a preset distance in a moving tangential direction of the X-ray detector relative to an imaging center axis of the computed tomography imaging system so as to obtain an extended detection area. The missing data compensation method comprises the following steps: acquiring reference three-dimensional projection data of a detection object, and weighting the reference three-dimensional projection data so as to compensate the missing three-dimensional projection data, thereby obtaining target three-dimensional projection data of the detection object. According to the missing data compensation method and the computed tomography imaging method and system disclosed by the invention, the detection area of the X-ray detector can be enlarged, so that theCT imaging vision is widened, and data truncation artifact in a reconstructed image can be suppressed; and therefore, the CT imaging quality is improved.

Description

technical field [0001] The present disclosure relates to the technical field of CT imaging, in particular to a compensation method for missing data, a computed tomography imaging method and system. Background technique [0002] CT (Computed Tomography, computerized tomography) uses X-ray sources and high-sensitivity X-ray detectors to scan around the detection object together, so as to convert the X-rays passing through the detection object into digital signals, and based on the reconstruction algorithm to scan the detection object Perform reconstruction of three-dimensional tomographic images. CT imaging is a non-destructive imaging method that can be used for inspection and detection of human body, animals, and industrial samples. [0003] In a CT imaging system, its imaging field of view is closely related to the detection area of ​​the X-ray detector. Under the same imaging geometry, the detection area of ​​the X-ray detector changes in direct proportion to the imaging...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03G06T11/00
Inventor 王哲刘宝东魏存峰魏龙
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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