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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