原名「台灣學術線上」
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項次 書目
1
題名:Development of a Multi-scale Noise Reduction Algorithm for Cone-beam Micro-CT Using Fuzzy Logic-based Anisotropic Filter     (12點)
著者:Zhi-Wei TangGuang-Shu Hu
出版地區:台灣
出版城市:台南市
學科:醫學綜合
關鍵字:Micro-CT ; Noise reduction ; Multi-scale ; Fuzzy logic ; Anisotropic filter
刊名:Journal of Medical and Biological Engineering
卷期:30卷5期(2010.10)
頁碼:283-288
語言:英語
摘要: 英文摘要PDF

In micro-CT, smaller voxels require much higher dose to achieve adequate signal-to-noise ratio compared to conventional CT, thus, necessitating a method to reduce statistical noise and then to improve dose efficiency. We developed a method for multi-scale filtration ofmicro-CT data before reconstruction. The study aims are to increase the signal-to-noise ratio (SNR) of image data while at the same time maintaining image quality, in particular spatial sharpness of the images. In our approach, each projection is decomposed into successive sub-bands representing different levels of resolution from coarse to fine. Within each sub-band, pixels are distinguished into high-contrast regions (edges) and smooth regions using a fuzzy logic operation. Anisotropic filters are then used to adaptively smooth the image data. The degree of smoothing is controlled by the factor obtained by fuzzy logic operation. Both the fuzzy membership function and fuzzy rules are defined in such a way that the performance is optimized in terms of its robustness to noise. The potential of our algorithm was evaluated using phantom and clinical data. It was shown that SNR could be improved by a factor of 4 at the same radiation dose without loss of sharpness or introduction of new image artifacts. Alternatively, on the basis of clinical performance, our method shows that the radiation dose can be significantly reduced while at the same time maintaining the noise level and the image sharpness. Additionally, our approach can be extended to other imaging methods as an efficient tool for edge-preserving noise reduction.


    

本卷期目次
Journal of Medical and Biological Engineering 30卷5期 (2010.10)
Review: Tissue Engineering Technology to Enhance Cell Recruitment for Regeneration Therapy/ Hiroshi KoharaYasuhiko Tabata
Parameter Investigation of Detrended Fluctuation Analysis for Short-term Human Heart Rate Variability/ Rong-Guan YehGau-Yang ChenJiann-Shing ShiehCheng-Deng Kuo
Development of a Multi-scale Noise Reduction Algorithm for Cone-beam Micro-CT Using Fuzzy Logic-based Anisotropic Filter/ Zhi-Wei TangGuang-Shu Hu
A High-capacity Reversible Data-hiding Scheme for Medical Images/ Shu-Chien HuangMing-Shun Lin
Multivariable Fuzzy Logic/Self-organizing for Anesthesia Control/ Yuan-Chao ChouMaysam F. AbbodJiann-Shing ShiehChia-Yu Hsu
Classification of Benign and Malignant Breast Tumors by Ultrasound B-scan and Nakagami-based Images/ Yin-Yin LiaoPo-Hsiang TsuiChih-Kuang Yeh
Study on Mechanical Properties of Thrombomodulin-transfected Cancer Cells by Atomic Force Microscopy/ Chi-Chang LinTsung-I YinYi-Dong LinTung-I LinYing-Ting ChenJen-Fin LinHua-Lin WuHsien-Chang Chang
Feasibility Study of Noninvasive Tumor Treatment with Focused Ultrasound/ Khaldon LweesyLuay FraiwanMais Al-ShalabiLayali MohammadRazan Al-Oglah
The Use of Virtual Reality-based Dynamometer Training to Enhance Selective Joint Torque Control in a Child with Cerebral Palsy/ Imre CikajloZlatko Matjačić
 
   
 
   

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