Modified FDK half-scan (MFDKHS) scheme on flat panel detector-based cone-beam CT

Dong Yang; Ruola Ning; Yong Yu; David Conover; Xianghua Lu

doi:10.1117/12.595172

20 April 2005 Modified FDK half-scan (MFDKHS) scheme on flat panel detector-based cone-beam CT

Dong Yang, Ruola Ning, Yong Yu, David Conover, Xianghua Lu

Proceedings Volume 5745, Medical Imaging 2005: Physics of Medical Imaging; (2005) https://doi.org/10.1117/12.595172
Event: Medical Imaging, 2005, San Diego, California, United States

Abstract

A modified Feldkamp (FDK) half-scan (MFDKHS) algorithm was developed to conduct the circular half-scan scheme on a flat panel detector (FPD)-based CBCT. X-ray source scans the object in a circular trajectory in the range of 180 degrees plus full fan angle rather than 360 degrees for a full scan. The redundant data is weighted by a weighting function in 3-D case based on the ones proposed by Parker¹, FDK algorithm is then applied on this weighted data, and another FBP term developed by Dr. Hu is also added to get the final reconstruction. The MFDKHS is expected to correct the attenuation coefficient drop of the reconstructed object associated with FDK in the place where Z (rotation axis) is away from scanning plane and improve the temporal resolution as well.

Citation Download Citation

Dong Yang, Ruola Ning, Yong Yu, David Conover, and Xianghua Lu "Modified FDK half-scan (MFDKHS) scheme on flat panel detector-based cone-beam CT", Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); https://doi.org/10.1117/12.595172

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