Noise reduction in computed tomography scans using 3-d anisotropic hybrid diffusion with continuous switch
- PMID: 19783496
- DOI: 10.1109/TMI.2009.2022368
Noise reduction in computed tomography scans using 3-d anisotropic hybrid diffusion with continuous switch
Abstract
Noise filtering techniques that maintain image contrast while decreasing image noise have the potential to optimize the quality of computed tomography (CT) images acquired at reduced radiation dose. In this paper, a hybrid diffusion filter with continuous switch (HDCS) is introduced, which exploits the benefits of three-dimensional edge-enhancing diffusion (EED) and coherence-enhancing diffusion (CED). Noise is filtered, while edges, tubular structures, and small spherical structures are preserved. From ten high dose thorax CT scans, acquired at clinical doses, ultra low dose ( 15 mAs ) scans were simulated and used to evaluate and compare HDCS to other diffusion filters, such as regularized Perona-Malik diffusion and EED. Quantitative results show that the HDCS filter outperforms the other filters in restoring the high dose CT scan from the corresponding simulated low dose scan. A qualitative evaluation was performed on filtered real low dose CT thorax scans. An expert observer scored artifacts as well as fine structures and was asked to choose one of three scans (two filtered (blinded), one unfiltered) for three different settings (trachea, lung, and mediastinal). Overall, the HDCS filtered scan was chosen most often.
Similar articles
-
Reducing CT radiation dose with iterative reconstruction algorithms: the influence of scan and reconstruction parameters on image quality and CTDIvol.Eur J Radiol. 2014 Sep;83(9):1645-54. doi: 10.1016/j.ejrad.2014.05.033. Epub 2014 Jun 5. Eur J Radiol. 2014. PMID: 25037931
-
Thoracic low-dose CT image processing using an artifact suppressed large-scale nonlocal means.Phys Med Biol. 2012 May 7;57(9):2667-88. doi: 10.1088/0031-9155/57/9/2667. Epub 2012 Apr 13. Phys Med Biol. 2012. PMID: 22504130
-
Application of adaptive non-linear 2D and 3D postprocessing filters for reduced dose abdominal CT.Acta Radiol. 2012 Apr 1;53(3):335-42. doi: 10.1258/ar.2011.110563. Epub 2012 Feb 23. Acta Radiol. 2012. PMID: 22362136 Clinical Trial.
-
The reduction of image noise and streak artifact in the thoracic inlet during low dose and ultra-low dose thoracic CT.Phys Med Biol. 2010 Mar 7;55(5):1363-80. doi: 10.1088/0031-9155/55/5/007. Epub 2010 Feb 10. Phys Med Biol. 2010. PMID: 20145292
-
Image filtering for improved dose resolution in CT polymer gel dosimetry.Med Phys. 2004 Jan;31(1):39-49. doi: 10.1118/1.1633106. Med Phys. 2004. PMID: 14761019
Cited by
-
Scale-Aware Edge-Preserving Full Waveform Inversion with Diffusion Filter for Crosshole Sensor Arrays.Sensors (Basel). 2024 Apr 30;24(9):2881. doi: 10.3390/s24092881. Sensors (Basel). 2024. PMID: 38732987 Free PMC article.
-
Structure-preserving low-dose computed tomography image denoising using a deep residual adaptive global context attention network.Quant Imaging Med Surg. 2023 Oct 1;13(10):6528-6545. doi: 10.21037/qims-23-194. Epub 2023 Sep 14. Quant Imaging Med Surg. 2023. PMID: 37869272 Free PMC article.
-
Hepatic vessels segmentation using deep learning and preprocessing enhancement.J Appl Clin Med Phys. 2023 May;24(5):e13966. doi: 10.1002/acm2.13966. Epub 2023 Mar 18. J Appl Clin Med Phys. 2023. PMID: 36933239 Free PMC article.
-
Fluorescence Lifetime Imaging Microscopy (FLIM) reveals spatial-metabolic changes in 3D breast cancer spheroids.Sci Rep. 2023 Mar 3;13(1):3624. doi: 10.1038/s41598-023-30403-7. Sci Rep. 2023. PMID: 36869092 Free PMC article.
-
ERA-WGAT: Edge-enhanced residual autoencoder with a window-based graph attention convolutional network for low-dose CT denoising.Biomed Opt Express. 2022 Oct 13;13(11):5775-5793. doi: 10.1364/BOE.471340. eCollection 2022 Nov 1. Biomed Opt Express. 2022. PMID: 36733738 Free PMC article.
MeSH terms
LinkOut - more resources
Full Text Sources
Other Literature Sources
Medical