Heavy-Tailed Noise Suppression and Derivative Wavelet Scalogram for Detecting DNA Copy Number Aberrations
Heavy-Tailed Noise Suppression and Derivative Wavelet Scalogram for Detecting DNA Copy Number Aberrations
复制标题
用于检测 DNA 拷贝数畸变的重尾噪声抑制和导数小波尺度图
DOI:
10.1109/tcbb.2017.2723884
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Huang, Heng
中科院分区:
文献类型:
--
作者:
Nguyen, Nha;Vo, An;Sun, Haibin;Huang, Heng
Most existing array comparative genomic hybridization (array CGH) data processing methods and evaluation models assumed that the probability density function (pdf) of noise in array CGH data is a Gaussian distribution. However, in practice, such noise distribution is peaky and heavy-tailed. Therefore, a Gaussian pdf is not adequate to approximate the noise in array CGH data and hence introduces wrong detections of chromosomal aberrations and leads misunderstanding on disease pathogenesis. A more accurate and sufficient model of noise in array CGH data is necessary and beneficial to the detection of DNA copy number variations. We analyze the real array CGH data from different platforms and show that the distribution of noise in array CGH data is fitted very well by generalized Gaussian distribution (GGD). Based on our new noise model, we propose a novel array CGH processing method combining the advantages of both the smoothing and segmentation approaches. The new method uses generalized Gaussian bivariate shrinkage function and one-directional derivative wavelet scalogram in generalized Gaussian noise. In the smoothing step, with the new generalized Gaussian noise model, we derive the heavy-tailed noise suppression algorithm in stationary wavelet domain. In the segmentation step, the 1D Gaussian derivative wavelet scalogram is employed to detect break points. Both real and simulated array CGH data with different noises (such as Gaussian noise, GGD noise, and real noise) are used in our experiments. We demonstrate that our new method outperforms other state-of-the-art methods, in terms of both root mean squared errors and receiver operating characteristic curves.
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DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
Mingxiang Teng;R. Irizarry
通讯作者:
R. Irizarry
影响因子:
2.1
作者:
Olshen, AB;Venkatraman, ES;Wigler, M
通讯作者:
Wigler, M
影响因子:
3.5
作者:
Lee, Arthur S.;Gutierrez-Arcelus, Maria;Lee, Charles
通讯作者:
Lee, Charles
DOI:
--
发表时间:
2014
期刊:
2014 IEEE Conference on Computational Intelligence in Bioinformatics and Computational Biology
影响因子:
--
作者:
Nha Nguyen;Kyoung
通讯作者:
Kyoung
影响因子:
9.8
作者:
Perry, George H.;Ben-Dor, Amir;Lee, Charles
通讯作者:
Lee, Charles