Evaluation of the effect of filters on reconstructed image quality from cone beam CT system

Bui Ngoc Ha1, Bui Tien Hung1, Tran Thuy Duong1, Tran Kim Tuan1, Tran Ngoc Toan2
1 Hanoi University of Science and Technology
2 Vietnam Atomic Energy Institute

Main Article Content


: 3D Filtered Back Projection (FBP) is a three-dimensional reconstruction algorithm usually used in Cone Beam Computed Tomography (CBCT) system. FBP is one of the most popular algorithms due to its reconstruction is fast while quality of the result is acceptable. It can also handle a more considerable amount of data with same computer performance with other algorithms. However, the quality of a reconstructed image by the FBP algorithm strongly depends on spatial filters and denoising filters applied to projections. In this paper an evaluation of the reconstructed image quality of the CBCT system by using different denoising filters and spatial filters to find out the best filters for the CBCT system is performed. The result shows that, there is a significantly decrease of the noise of projection with the combination of Median and Gaussian filters. The reconstructed image has high resolution with Cosine filter and becomes more sharpen with Hanning filter.

Article Details


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