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Position Prediction in CT Volume Scans

In their daily work, radiologists often need to localize and align parts of CT volume scans to perform among others di erential diagnosis. In these cases, it is desired to load only the relevant sub volume of the scan and to align the sub volume automatically to the correct position of the query scan. Common techniques employ landmark detectors and interpolation to solve this problem. Yet, these techniques are are not applicable in case of very small volume scans where the query scan comprises only a small amount of images. In this paper, we propose a method to use small sub volumes in CT volume scans for identifying and aligning CT Scans. Our solution employs combinations of weighted image descriptors and instance-based regression and thus demonstrates the need for machine learning techniques in the case of position prediction. The experiments show that the new method improves the mean error and standard deviation by 6% and 10%, respectively, compared to a state of the art method.