WSEAS Transactions on Biology and Biomedicine
Print ISSN: 1109-9518, E-ISSN: 2224-2902
Volume 22, 2025
An Efficient Quality Enhancement Method for Low-Dose CBCT Imaging
Authors: , , ,
Abstract: Cone-Beam Computed Tomography (CBCT) is a widely used imaging technique in medical and dental applications. However, low-dose radiation CBCT images are prone to aliasing artifacts, which introduce artifacts in microstructures, degrade image quality, and as a result affect diagnostic accuracy. Existing CBCT image enhancement approaches tend to focus on noise reduction and higher resolution but they fail to address aliasing artifacts. This paper introduces a unique anti-aliasing method specifically designed for low-dose CBCT images. The proposed approach utilizes a Butterworth filter to remove aliasing artifacts in high frequencies, while speckle noise is reduced by a Non-Local Means (NLM) filter. Finally, the overall visual quality is improved by a Laplacian filter which enhances edges while steps are taken to adjust brightness and contrast. Subjective evaluations show that our approach outperforms existing methods by an average of 98.63%, effectively mitigating aliasing without compromising resolution or introducing additional noise, thereby improving the diagnostic reliability of CBCT images and addressing a critical gap in current clinical practice.
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Keywords: Cone-Beam Computed Tomography, Low-dose radiation imaging, aliasing artifacts, Butterworth filter, Non-Local Means filter, denoising, speckle noise
Pages: 76-81