血管液态金属造影成像金属伪影校正算法研究

基金项目:

中国科学院科研装备研制项目(YZ201410)

教育部留学回国人员科研启动基金资助项目

详细信息

Metal Artifacts Correction Method Research about Liquid Metal Angiography

1. The School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
2. Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
3. Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China;
4. Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China

摘要: X射线显微CT可用于研究解剖学血管网络的可视化问题。为了突出显示血管,可向血管中注入液体金属造影剂。但是由于液体金属造影剂具有较高的线性衰减系数,会在重建图像上产生放射状的金属伪影,造成血管边界不准确。为了解决这一问题,基于骨硬化校正方法,提出了新算法。实验结果表明该方法能减轻离体猪肾血管造影成像的金属伪影,提高成像质量。
- 计算机断层成像 /
- 金属伪影校正 /
- 骨模型校正
Abstract: Computed Tomography(CT) can be used in the visualization on the anatomical vessel networks. Liquid metal angiography can enhance the vessel networks. Because the liquid metal contrast agent has high linear attenuation coefficient, the reconstructed images usually have radial metal artifacts, which will cause the inaccurate edges of the vessels. To solve this problem, a new correction method based on bone beam-hardening correction is developed. The experiment results show that it can reduce the metal artifacts in isolated pig kidney liquid metal angiography image and improve the image quality.
- computed tomography /
- metal artifacts correction /
- bone beam-hardening correction