Efficient Prealignment of CT Scans for Registration through a Bodypart Regressor

Hans Meine, Alessa Hering

Keywords: SSBR, self-supervised bodypart regressor, registration, prealignment

Abstract:

Convolutional neural networks have not only been applied for classification of voxels, objects, or images, for instance,
but have also been proposed as a bodypart regressor. We pick up this underexplored idea and evaluate its value for
registration: A CNN is trained to output the relative height within the human body in axial CT scans,
and the resulting scores are used for quick alignment between different timepoints. Preliminary results confirm that
this allows both fast and robust prealignment compared with iterative approaches.

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