Skip to main content

Table 3 Dose distributions to the target with simulation of 0 mm, 1 mm and 2 mm safety margins 1) in the treatment plan (plan), 2) in the scenario of radiosurgery without image-guidance (No IG), 3) in the scenario of radiosurgery after image-guided correction of translational errors only and not rotations (IG trans) and 4) simulating errors observed immediately following image-guided radiosurgery (Post IG-RS)

From: Dosimetric consequences of translational and rotational errors in frame-less image-guided radiosurgery

Safety margin   Plan No IG IG trans Post IG-SRS
0 mm Absolute CI 0.96 ±0.06 0.72 ±0.19 0.96 ±0.06 0.94 ±0.07
  <95% planned CI   91% 3% 14%
1 mm Absolute CI 1.00 ±0.01 0.82 ±0.19 1.00 ±0.01 0.99 ±0.01
  <95% planned CI   70% 0% 0%
2 mm Absolute CI 1.00 ±0.04 0.90 ±0.17 1.00 ±0.04 1.00 ±0
  <95% planned CI   40% 0% 0%
  1. Absolute values of the coverage index (average ± standard deviation) and percent of the patients with <95% planned target coverage are summarized.