CT SYSTEMS AND METHODS THEREOF

摘要

A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.

主权项

1. A Computed Tomography (CT) system, comprising:
a conveyor mechanism configured to convey and move an object under inspection linearly; a first scanning stage comprising multiple sections of ray sources, multiple sections of detectors, and a first data acquisition device, and configured to scan the object and generate a first digital signal, wherein each section of ray sources comprises a plurality of source points, and the multiple sections of ray sources and the multiple sections of detectors are arranged in an inverse-geometry CT manner; a second scanning stage configured to be spaced from the first scanning stage at a preset distance in a direction of the object's movement, and comprising multiple sections of ray sources, multiple sections of detectors, and a second data acquisition device, wherein each section of ray sources comprises a plurality of source points, and the multiple sections of ray sources and the multiple sections of detectors are arranged in an inverse-geometry CT manner; a control device configured to control an order in which the source points in the first and second scanning stages emit beams, so that the first scanning stage generates the first digital signal, and the second scanning stage outputs a second digital signal; and a processing device configured to reconstruct a CT image of the object based on the first and second digital signals.