Fig. 5From: Optimization of training periods for the estimation model of three-dimensional target positions using an external respiratory surrogateAbsolute baseline drift of the IR marker, which calculated during each baseline drift correction period (TC = 5, 10, and 15 s). In the graph, a, b, and c for Patients 1 and 2 indicate the baseline drift between first and second scans, first and third scans, and second and third scans, respectivelyBack to article page