Poly-capillary x-ray collimating lens composed with channels of different diameters for medical imaging

Kai Pan; Shuang Zhang; Zhao Wang; Zhuxuan Duo; Changqi Liu; Zhiguo Liu; Tianxi Sun

doi:10.1117/12.2580126

5 November 2020 Poly-capillary x-ray collimating lens composed with channels of different diameters for medical imaging

Kai Pan, Shuang Zhang, Zhao Wang, Zhuxuan Duo, Changqi Liu, Zhiguo Liu, Tianxi Sun

Proceedings Volume 11565, AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics; 115650A (2020) https://doi.org/10.1117/12.2580126
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

Poly-capillary X-ray lens provided a special mechanism to control X-ray radiation. In recent reported works, polycapillary X-ray lens started to be applied in medical imaging fields. The use of poly-capillary X-ray lens in medical imaging systems brought proper benefits in Compton scattering rejection and resolution enhancement. However, the Xray intensity distribution of the output has unsatisfied uniformity when using conventional poly-capillary lens if the primary rays emitted by a common X-ray tube. Uneven intensity distribution will cause problems such as details loss and longer exposure time for better reconstruction results. In this work, a new type of poly-capillary X-ray collimating lens was introduced for medical imaging. Different from the conventional ones, this kind of lens was divided into three regions and subarray units of different diameter channels were placed in their corresponding regions. A program was written based on ray-tracing method for optical design and imaging simulation. The optical properties of this new type collimating lens were tested, using a 50.0μm Cu target X-ray tube with 20.0kV voltage and 0.2mA currents. A plateau region that had good uniformity which is 4.0mm in diameter was obtained. In addition, X-ray transmission imaging experiments for small samples showed improvements in imaging qualities using this new optical component. Although the existence of manufacturing difficulties effects the finished product quality, this new kind of X-ray poly-capillary lens shows its potential in medical imaging.

Citation Download Citation

Kai Pan, Shuang Zhang, Zhao Wang, Zhuxuan Duo, Changqi Liu, Zhiguo Liu, and Tianxi Sun "Poly-capillary x-ray collimating lens composed with channels of different diameters for medical imaging", Proc. SPIE 11565, AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics, 115650A (5 November 2020); https://doi.org/10.1117/12.2580126

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KEYWORDS

X-rays

X-ray imaging

Medical imaging

Imaging systems

Manufacturing

Optical components

Modulation transfer functions

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