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Time‐of‐flight sensor for respiratory motion gating
Author(s) -
Schaller Christian,
Penne Jochen,
Hornegger Joachim
Publication year - 2008
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2938521
Subject(s) - signal (programming language) , computer vision , computer science , respiratory monitoring , gating , artificial intelligence , torso , time of flight , biomedical engineering , respiratory system , physics , medicine , optics , physiology , anatomy , programming language
In this technical note we present a system that uses time‐of‐flight (ToF) technology to acquire a real‐time multidimensional respiratory signal from a 3D surface reconstruction of the patient's chest and abdomen without the use of markers. Using ToF sensors it is feasible to acquire a 3D model in real time with a single sensor. An advantage of ToF sensors is that their high lateral resolution makes it possible to define multiple regions of interest to compute an anatomy‐adaptive multi‐dimensional respiratory signal. We evaluated the new approach by comparing a ToF based respiratory signal with the signal acquired by a commercially available external respiratory gating system and achieved an average correlation coefficient of 0.88.