Analysis of Patterns in Tremor Diagnosis Spiral Drawings for Automated Classification.

Tremor analysis is a common task in diagnosis of movement disorders. In this paper, we present a new method for an automated classification of tremor strength based on digitized spiral drawings. We used statistical measurements on relative line orientations, which are calculated on the full image. Therefore, this approach is insensitive to drawing errors (like line crossings or missing line parts). On a test set of 109 clinical spiral drawings the difference within the calculated values for different levels of tremor strength was highly significant and allowed a fast and straightforward classification.