Tumour feature analysis with unsupervised machine learning

Nattkemper TW, Wismüller A (2005)
Medical Image Analysis 9(4): 344-351.

Journal Article | Published | English

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Abstract
Dynamic contrast enhanced magnetic resonance imaging (DCE MRI) is applied for diagnosis and therapy control of breast cancer. The malignancy of a lesion is expressed in the average signal kinetics of selected regions of interest (ROI) representing the lesion. The technique is reported to characterize malignant tumors with high sensitivity and highly variable specificity. Computer-based diagnosis (CAD) systems have been proposed to analyze and classify signal time curve data, extracted from hand selected ROI in the DCE MRI data. In this paper, we apply the self-organizing map (SOM) to a set of time curve feature vectors of single voxels from seven benign lesions and seven malignant tumors. Applying the SOM we are able to project the time curve values of each voxel on a two-dimensional map. The results show, that the SOM is able to visualize the hidden two-dimensional structure of the six-dimensional signal space. Using the trained SOM, we are able to identify voxels with benign or malignant signal characteristics and to visualize lesion cross-sections with pseudo-colors. A comparison with the established three time points method shows that the SOM has clear potential for deriving visualization parameters in DCE MRI analysis.
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Nattkemper TW, Wismüller A. Tumour feature analysis with unsupervised machine learning. Medical Image Analysis. 2005;9(4):344-351.
Nattkemper, T. W., & Wismüller, A. (2005). Tumour feature analysis with unsupervised machine learning. Medical Image Analysis, 9(4), 344-351.
Nattkemper, T. W., and Wismüller, A. (2005). Tumour feature analysis with unsupervised machine learning. Medical Image Analysis 9, 344-351.
Nattkemper, T.W., & Wismüller, A., 2005. Tumour feature analysis with unsupervised machine learning. Medical Image Analysis, 9(4), p 344-351.
T.W. Nattkemper and A. Wismüller, “Tumour feature analysis with unsupervised machine learning”, Medical Image Analysis, vol. 9, 2005, pp. 344-351.
Nattkemper, T.W., Wismüller, A.: Tumour feature analysis with unsupervised machine learning. Medical Image Analysis. 9, 344-351 (2005).
Nattkemper, Tim Wilhelm, and Wismüller, Axel. “Tumour feature analysis with unsupervised machine learning”. Medical Image Analysis 9.4 (2005): 344-351.
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8 Citations in Europe PMC

Data provided by Europe PubMed Central.

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