X-ray projection microscopy and cone-beam microtomography

Ge Wang; T. H. Lin; Ping Chin Cheng; D. M. Shinozaki; S. P. Newberry

doi:10.1117/12.47803

1 April 1991 X-ray projection microscopy and cone-beam microtomography

Ge Wang, T. H. Lin, Ping Chin Cheng, D. M. Shinozaki, S. P. Newberry

Proceedings Volume 1398, CAN-AM Eastern '90; (1991) https://doi.org/10.1117/12.47803
Event: CAN-AM Eastern '90: 1st Canadian-American Eastern Regional Conference on Applications of Optical Engineering, 1990, Rochester, NY, United States

Abstract

A laboratory sized X-ray projection microscope and microtomographic imaging system is being developed at SUNYAB (AMIL-ARTS). High resolution two dimensional images can be recorded rapidly using a high resolution phosphor and a cooled slow scan CCD camera. The effective source size is kept small to maximize the resolution. For this purpose the electron beam is focused onto a thin film target. Three dimensional information can be derived from the high resolution two dimensional images by generating stereo pairs or by reconstructing the complete tomographic image. Real time stereo pairs can be produced by rapidly moving the position of the electron spot between two locations on the thin film target thus irradiating the specimen with X-rays from two spatially distinct directions. For high resolution tomography or microtomography the two dimensional images are recorded for a large number of different orientations of the specimen. A cone beam reconstruction scheme based on a convolution and back projection algorithm is being developed. To optimize the experimental parameters in microtomography a variety of mathematical phantoms have been examined using computer simulation technique. The experimental results reveal the quantitative relationship between the accuracy of the reconstructed image and the experimental parameters such as object shape orientation and position. 1.

Citation Download Citation

Ge Wang, T. H. Lin, Ping Chin Cheng, D. M. Shinozaki, and S. P. Newberry "X-ray projection microscopy and cone-beam microtomography", Proc. SPIE 1398, CAN-AM Eastern '90, (1 April 1991); https://doi.org/10.1117/12.47803

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