Efficiently computing and registering digitally reconstructed radiographs

Juan Pablo Téllez Hernandorena, Yu Su, Mark Fisher

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Abstract

Generation of digitally reconstructed radiographs (DRRs) is computationally expensive and has been cited as the rate-limiting step in the execution time of intensity-based two-dimensional/three-dimensional registration algorithms. This paper considers the problem of generating DRRs by conventional ray tracing. Experiments confirm that good quality reconstructions can be obtained using this approach in a few seconds. We evaluate the approach for automatic patient setup prior to radiotherapy treatment by performing intensity based 2D-3D registration using normalized cross correlation. Preliminary results using a pelvic CT data set show the method is accurate to about ±2 pixels (i.e. ±0.3 mm).
Original languageEnglish
Publication statusPublished - Sep 2006
EventProceedings of Eighteenth International Conference on Systems Engineering - Coventry University, Coventry, United Kingdom
Duration: 5 Sep 20067 Sep 2006

Conference

ConferenceProceedings of Eighteenth International Conference on Systems Engineering
CountryUnited Kingdom
CityCoventry University, Coventry
Period5/09/067/09/06

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