Adaptive helical computed tomography reconstruction for MIP artifact reduction

Jiang Hsieh

doi:10.1117/12.279717

31 October 1997 Adaptive helical computed tomography reconstruction for MIP artifact reduction

Jiang Hsieh

Proceedings Volume 3170, Image Reconstruction and Restoration II; (1997) https://doi.org/10.1117/12.279717
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Helical computed tomography has become the preferred patient scanning mode in many clinical applications. A number of comparative studies have been performed to evaluate its performance parameters, such as the noise and the slice sensitivity profile. The objective of this paper is to examine the non-stationary noise characteristics of helical images and demonstrate its impact on the 3D image artifacts. We first derive an analytical equation that relate the interactions between the helical reconstruction scheme and the fan-beam filtered backprojection algorithm. We demonstrate that for many popular helical weights, the nose variation within the field of view of the reconstruction is close to a factor of 3. An adaptive approach to the reduction of the artifacts is proposed.

Citation Download Citation

Jiang Hsieh "Adaptive helical computed tomography reconstruction for MIP artifact reduction", Proc. SPIE 3170, Image Reconstruction and Restoration II, (31 October 1997); https://doi.org/10.1117/12.279717

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