151. Extending Supervoxel-based Abnormal Brain Asymmetry Detection to the Native Image Space
- Author
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Samuel Botter Martins, Alexandre X. Falcão, and Alexandru Telea
- Subjects
Computer science ,business.industry ,Deep learning ,Brain ,Pattern recognition ,Image segmentation ,Magnetic Resonance Imaging ,Healthy Volunteers ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Histogram ,Outlier ,Image Processing, Computer-Assisted ,False positive paradox ,Humans ,Brain asymmetry ,Anomaly detection ,Artificial intelligence ,Coordinate space ,business ,030217 neurology & neurosurgery - Abstract
Most neurological diseases are associated with abnormal brain asymmetries. Recent advances in automatic unsupervised techniques model normal brain asymmetries from healthy subjects only and treat anomalies as outliers. Outlier detection is usually done in a common standard coordinate space that limits its usability. To alleviate the problem, we extend a recent fully unsupervised supervoxel-based approach (SAAD) for abnormal asymmetry detection in the native image space of MR brain images. Experimental results using our new method, called N-SAAD, show that it can achieve higher accuracy in detection with considerably less false positives than a method based on unsupervised deep learning for a large set of MR-T1 images.
- Published
- 2019