Super Resolution in CT

作者：Yan, Ziye; Li, Jianwu^*; Lu, Yao; Yan, Hongxia; Zhao, Yanfeng

来源：International Journal of Imaging Systems and Technology, 2015, 25(1): 92-101.

DOI：10.1002/ima.22125

• computed tomography
• super resolution
• sinogram
• in-plane resolution
• slice thickness

The general framework of super resolution in computed tomography (CT) system is introduced. Two data acquisition ways before or after the reconstruction respectively are described. Three models including the sinogram model, the in-plane model and the z-axis model, are addressed to adapt super resolution to CT system. The improved iterative back projection algorithm is used in this work. Experimental results based on simulated data, GE performance phantom scanned by GE LightSpeed VCT system, one patient volunteer scanned by TOSHIBA Aquilion system, and a special experimental apparatus demonstrate that super resolution is effective to improve the resolution of CT images. The sinogram model is suitable for future CT system; the in-plane model is restricted to some special clinical diagnoses; and the z-axis model is practicable for current general clinical CT images.

• 出版日期2015-3
• 单位北京理工大学; 中国医学科学院北京协和医院