Characteristics of the Patients Included in the Study.

<p>Patient 21 Was Treated in the RUL and LUL.</p

Results of the Paired <i>t</i>-test for Differences between Free Respiration and Guided Respiration with the 3-s Cycle Using the Visual Guidance System (<i>N</i> = 40 with Respiration Signals).

<p>Results of the Paired <i>t</i>-test for Differences between Free Respiration and Guided Respiration with the 3-s Cycle Using the Visual Guidance System (<i>N</i> = 40 with Respiration Signals).</p

Results of the Standard Deviation of the Respiration Signals for the 23 Patients Using the Visual Guidance System.

<p>Results of the Standard Deviation of the Respiration Signals for the 23 Patients Using the Visual Guidance System.</p

Setup for Recording the Breathing Signals of a Patient Using the Varian Real-time Position Management (RPM; Varian Medical Systems, Palo Alto, CA) System with a Visible Guiding System.

<p>Setup for Recording the Breathing Signals of a Patient Using the Varian Real-time Position Management (RPM; Varian Medical Systems, Palo Alto, CA) System with a Visible Guiding System.</p

Histogram and normalized curves for the translational and rotational variations between the 3D CBCT and the 6D CBCT.

<p>(a) Lateral (x-axis); (b) Longitudinal (z-axis); (c) Vertical (y-axis), and (d) Yaw dimensions.</p

Image registration using planning computed tomography (CT) and cone-beam computed tomography (CBCT) for patient #18 with offline 6D fusion in offline review.

<p>(a) Axial planes; (b) Coronal planes; and (c) Sagittal planes.</p

Box and whisker plots of the translational difference variations in the lateral, longitudinal, and vertical directions for the 6D ExacTrac vs. 3D cone-beam computed tomography (CBCT), 6D ExacTrac vs. 6D CBCT, and 3D CBCT vs. 6D CBCT.

<p>Box and whisker plots of the translational difference variations in the lateral, longitudinal, and vertical directions for the 6D ExacTrac vs. 3D cone-beam computed tomography (CBCT), 6D ExacTrac vs. 6D CBCT, and 3D CBCT vs. 6D CBCT.</p

Box and whisker plots of the translational variations in the lateral, longitudinal, and vertical directions with 6D ExacTrac, 3D cone-beam computed tomography (CBCT), and 6D CBCT.

<p>Box and whisker plots of the translational variations in the lateral, longitudinal, and vertical directions with 6D ExacTrac, 3D cone-beam computed tomography (CBCT), and 6D CBCT.</p

Characteristics of the Patients in the Study.

<p>Characteristics of the Patients in the Study.</p

Inter-fractional Setup Variations (mean ± SD) for the 28 Patients.

<p>Setup errors in the (a) lateral (<i>x-</i>axis, left to right), (b) longitudinal (<i>z-</i>axis, superior to inferior), (c) vertical (<i>y-</i>axis, anterior to posterior), (d) pitch, (e) roll, and (f) yaw dimensions.</p