Fig. 3From: Optimization of training periods for the estimation model of three-dimensional target positions using an external respiratory surrogateScatter plots of the respiratory periods of all patients, and the target motion amplitude in (a) the left-right, (b) the superior-inferior, and (c) the anterior-posterior (AP) directions; and (d) that of the infrared reflective (IR) marker in the AP direction. (e) Correlation coefficients between IR marker motion in the AP direction and target motionBack to article page