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. 2023 Jun 22;15(6):e40778. doi: 10.7759/cureus.40778

Figure 3. Example of the delivery report of tracking SBRT.

Figure 3

International electrotechnical commission X (lateral), Y (longitudinal), and Z (vertical) displacement of fiducial markers from the position in the planning CT at fraction four is displayed. The target offset exceeded the threshold level (2.5 mm) due to a gradual shift (red arrow), and we acquired onboard another kV CT to correct the position and resumed the treatment.

Abbreviations: SBRT, stereotactic body radiation therapy; CT, computed tomography; kV, x-ray tube voltage