Filtered back-projection reconstruction technique for coherent-scatter computed tomography

Udo van Stevendaal; Jens-Peter Schlomka; Michael Grass

doi:10.1117/12.480113

15 May 2003 Filtered back-projection reconstruction technique for coherent-scatter computer tomography

Udo van Stevendaal, Jens-Peter Schlomka, Michael Grass

Proceedings Volume 5032, Medical Imaging 2003: Image Processing; (2003) https://doi.org/10.1117/12.480113
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

For the first time, a reconstruction technique based on filtered back-projection (FBP) using curved 3D back-projection lines is applied to 2D coherent-scatter computed tomography (CSCT) projection data. It has been demonstrated, that CSCT yields information about the molecular structure of an object. So far, the acquired projection data are reconstructed with the help of algebraic reconstruction techniques. Due to the computational complexity of iterative reconstruction, these methods lead to relatively long reconstruction times. In this contribution, a reconstruction algorithm based on 3D FBP is introduced and tested with simulated projection data as well as with projection data acquired with a demonstrator setup similar to a multi-line CT scanner geometry. Within a fraction of computation time at least a comparable image quality is achieved when using FBP reconstruction. In addition, it has the advantage, that - in contrast to iterative reconstruction schemes - sub-field-of-view reconstruction becomes feasible. This allows a selective reconstruction of the scatter function for a region of interest. The method is based on a row by row high-pass filtering of the scatter data, with or without fan to parallel beam rebinning. The 3D back-projection is performed along curved lines through a volume defined by the in-plane spatial coordinates and the wave-vector transfer.

Citation Download Citation

Udo van Stevendaal, Jens-Peter Schlomka, and Michael Grass "Filtered back-projection reconstruction technique for coherent-scatter computer tomography", Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); https://doi.org/10.1117/12.480113

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