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.

<p>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.</p

Characteristics of intra-fraction prostate motion for 1929 timestamps.

<p>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.</p

A schema of intra-fraction prostate motion simulation using log files.

<p>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.</p

Comparison of dose–volume indices between with and without consideration of intra-fraction prostate motion.

<p>Comparison of dose–volume indices between with and without consideration of intra-fraction prostate motion.</p

Dose constraints for the CyberKnife prostate plan in this trial.

<p>Dose constraints for the CyberKnife prostate plan in this trial.</p