A method for automatic detection and classification of stroke from brain CT images
| Autor: | Jayanthi Sivaswamy, Saurabh Sharma, L. T. Kishore, Mayank Chawla |
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| Rok vydání: | 2009 |
| Předmět: |
Image processing
Pattern Recognition Automated Wavelet Imaging Three-Dimensional Fuzzy Logic Region of interest Artificial Intelligence Histogram Medical imaging Image Processing Computer-Assisted Medicine Humans Computer vision False Positive Reactions Contextual image classification business.industry Brain Reproducibility of Results Models Theoretical Image Enhancement Stroke Radiographic Image Interpretation Computer-Assisted Tomography Artificial intelligence Neural Networks Computer Abnormality business Tomography X-Ray Computed |
| Zdroj: | Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference. 2009 |
| ISSN: | 2375-7477 |
| Popis: | Computed tomographic (CT) images are widely used in the diagnosis of stroke. In this paper, we present an automated method to detect and classify an abnormality into acute infarct, chronic infarct and hemorrhage at the slice level of non-contrast CT images. The proposed method consists of three main steps: image enhancement, detection of mid-line symmetry and classification of abnormal slices. A windowing operation is performed on the intensity distribution to enhance the region of interest. Domain knowledge about the anatomical structure of the skull and the brain is used to detect abnormalities in a rotation- and translation-invariant manner. A two-level classification scheme is used to detect abnormalities using features derived in the intensity and the wavelet domain. The proposed method has been evaluated on a dataset of 15 patients (347 image slices). The method gives 90% accuracy and 100% recall in detecting abnormality at patient level; and achieves an average precision of 91% and recall of 90% at the slice level. |
| Databáze: | OpenAIRE |
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