Static dual-energy tomosynthesis camera system and method

Abstract

The invention relates to a static dual-energy tomosynthesis camera system and method. The system comprises a fixed rack, one end of the fixed rack is fixedly provided with a distributed carbon nano tube array light source, the other end of the fixed rack is fixedly provided with a double-layer detector, the distributed carbon nano tube array light source comprises a plurality of field emission light sources arranged in a distributed mode, the double-layer detector comprises two scintillation detectors which are overlapped with each other and are respectively used for absorbing low-energy X-ray photons and high-energy X-ray photons. Compared with the prior art, the distributed carbon nanotube array light source is used for replacing a single ray source and a rotating rack framework in a traditional BDT, and the scanning process in multi-angle measurement is avoided; the double-layer detector is adopted to respectively receive measurement information of two energy spectrum intervals, so that a multi-energy spectrum cross-sectional image containing die body material component information can be reconstructed, hidden minimal lesions in a two-dimensional image can be found, and unnecessary biopsy and measurement time and potential motion artifacts are reduced.

Description

technical field [0001] The invention relates to the field of three-dimensional tomosynthesis imaging, in particular to a static dual-energy tomosynthesis imaging system and method. Background technique [0002] Three-dimensional tomosynthesis is an emerging tomographic imaging method, which obtains a few two-dimensional projections of objects within a limited range of angles, and can reconstruct tomographic images at different depths that reflect three-dimensional information of objects. Compared with traditional computed tomography technology, it has the advantages of small X-ray radiation dose and low economic cost. As a potential screening tool, it has been clinically used in the detection of lung and breast cancer lesions. [0003] A typical application of 3D tomosynthesis imaging technology is digital breast tomosynthesis (Digital Breast Tomosynthesis, referred to as DBT), which consists of a high-voltage X-ray source, a rotating gantry, and an energy integration detec...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a static detector to overcome the disadvantages of the prior art that the cost of obtaining high-energy and low-energy measurement values ​​by the photon counting detector is relatively high, and the measurement time of the projection data of multiple projection angles obtained by stepping or continuous rotation is relatively long. Dual-energy tomosynthesis imaging system and method

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