title: Time-of-flight sensor for respiratory motion gating.
abstract: 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 multidimensional 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.
authors.affiliation: Chair for Pattern Recognition, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr 3, 91058 Erlangen, Germany. christian.schaller@informatik.uni-erlangen.de
authors.forename: Christian
authors.initials: C
authors.lastname: Schaller
authors.forename: Jochen
authors.initials: J
authors.lastname: Penne
authors.forename: Joachim
authors.initials: J
authors.lastname: Hornegger
mesh_terms: D000465:Algorithms; D016477:Artifacts; D002138:Calibration; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008027:Light; D015233:Models, Statistical; D008962:Models, Theoretical; D009038:Motion; D009068:Movement; D011856:Radiographic Image Enhancement; D015203:Reproducibility of Results; D012119:Respiration