Mr. Mert Dikmen Profile

Mert Dikmen

at Beckman Institute for Advanced Science & Techn

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Proceedings Article | 17 March 2008 Paper

Joint detection and localization of multiple anatomical landmarks through learning

Mert Dikmen, Yiqiang Zhan, Xiang Sean Zhou

Proceedings Volume 6915, 691538 (2008) https://doi.org/10.1117/12.770914

KEYWORDS: Sensors, Medical imaging, Image registration, Computed tomography, Head, Kidney, Image segmentation, Chest, Visualization, Magnetic resonance imaging

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Reliable landmark detection in medical images provides the essential groundwork for successful automation of various open problems such as localization, segmentation, and registration of anatomical structures. In this paper, we present a learning-based system to jointly detect (is it there?) and localize (where?) multiple anatomical landmarks in medical images. The contributions of this work exist in two aspects. First, this method takes the advantage from the learning scenario that is able to automatically extract the most distinctive features for multi-landmark detection. Therefore, it is easily adaptable to detect arbitrary landmarks in various kinds of imaging modalities, e.g., CT, MRI and PET. Second, the use of multi-class/cascaded classifier architecture in different phases of the detection stage combined with robust features that are highly efficient in terms of computation time enables a seemingly real time performance, with very high localization accuracy. This method is validated on CT scans of different body sections, e.g., whole body scans, chest scans and abdominal scans. Aside from improved robustness (due to the exploitation of spatial correlations), it gains a run time efficiency in landmark detection. It also shows good scalability performance under increasing number of landmarks.

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