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Patient Displacement Analysis Using the Generalized Hough Transform

M. Berger, U.R. Meier, T. Hanselmann, G. Gerig, G. Székely, and U.M. Lütolf
4th International Workshop on Electronic Portal Imaging
June 1996


A major goal in electronic portal imaging is to automatically measure patient setup deviation between or even during treatment sessions. For several reasons this is a very challenging task. Especially the low contrast of the portal images due to the high radiation energy and the possibility of out-of-plane rotations are limiting factors. This two-page abstract outlines a novel approach using an extended version of the Generalized Hough Transform (GHT). First tests with the GHT showed promising, reproducible results that are comparable to manual displacement measurements.

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  author = {M. Berger and U.R. Meier and T. Hanselmann and G. Gerig and G. Székely and and U.M. L\"utolf},
  title = {Patient Displacement Analysis Using the Generalized Hough Transform},
  booktitle = {4th International Workshop on Electronic Portal Imaging},
  year = {1996},
  month = {June},
  keywords = {portal imaging, medical image analysis, matching, deformable}