Table 1.
Dose constraints for the CyberKnife prostate plan in this trial.
Fig 1.
A schema of intra-fraction prostate motion simulation using log files.
A flowchart of intra-fraction prostate motion simulation using ShioRIS2.0 (left) and a diagram showing the worst-case intra-fraction motion during tracking irradiation based on log file analysis (right). The worst-case motion scenario that prostate had moved to the next detected position immediately after X-ray image acquisition was simulated by subtracting intra-fraction prostate motion between pre- and post-deviation on log files.
Fig 2.
Characteristics of intra-fraction prostate motion for 1929 timestamps.
Two-dimensional scatter plots in the (A) axial, (B) sagittal, and (C) coronal planes, and histograms in the (D) right-left, (E) anterior-posterior, and (F) inferior-superior directions. The width of bins was 0.5 mm.
Table 2.
Summary of prostate motion per timestamp on log files, the worst-case motion during tracking irradiation simulated in this study in the SI, RL, and AP directions and the 3D vector length.
Table 3.
Comparison of dose–volume indices between with and without consideration of intra-fraction prostate motion.