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Table 2 Mean intrinsic set-up deviations for the lateral, longitudinal and vertical directions

From: A randomized study of the effect of patient positioning on setup reproducibility and dose distribution to organs at risk in radiotherapy of rectal cancer patients

 

Mean value (mm)

95 % CIa

Lateral (∆ x)

 Supine

0.4

[−0.8, 1.6]

 Prone

0.4

[−0.6, 1.4]

Longitudinal (∆ y)

 Supine

0.1

[−0.7, 0.8]

 Prone

- 0.3

[−1.3, 0.7]

Vertical (∆ z)

 Supine

0.0

[−1.1, 1.1]

 Prone

0.4

[−1.1, 1.8]

  1. a CI confidence interval