Tissue segmentation from head {MRI}: a ground truth validation for feature-enhanced tracking

Type of publication:  Artikel
Zeitschrift: Current Directions in Biomedical Engineering
Band: 1
Nummer: 1
Jahr: 2015
Monat: September
Seiten: 228-231
Notiz: High-Accuracy Head Tracking
ISSN: 2364-5504
DOI: 10.1515/cdbme-2015-0057
Abriss: Accuracy is essential for optical head-tracking in cranial radiotherapy. Recently, the exploitation of local patterns of tissue information was proposed to achieve a more robust registration. Here, we validate a ground truth for this information obtained from high resolution MRI scans. In ve subjects we compared the segmentation accuracy of a semi-automatic algorithm with ve human experts. While the algorithm segments the skin and bone surface with an average accuracy of less than 0.1mm and 0.2 mm, respectively, the mean error on the tissue thickness was 0.17 mm.We conclude that this accuracy is a reasonable basis for extracting reliable cutaneous structures to support surface registration.
Autoren: Wissel, Tobias
Stüber, Patrick
Wagner, Benjamin
Schweikard, Achim
Ernst, Floris
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