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Table 1 Setup error, motion error and total error

From: Potentials of on-line repositioning based on implanted fiducial markers and electronic portal imaging in prostate cancer radiotherapy

 

Mean ± SD [mm] i = 1,..., 8; j = 1,..., 23

Range [mm]

Setup error Δs ij

  

Left-right

0.8 ± 2.8

-8/10

Superior-inferior

0.1 ± 3.4

-9/14

Anterior-posterior

-1.2 ± 3.6

-15/9

Prostate movement Δm ij

  

Left-right

-0.3 ± 1.8

-6/9

Superior-inferior

0.9 ± 2.8

-9/8

Anterior-posterior

0.3 ± 3.5

-10/10

Total error Δtot ij

  

Left-right

0.5 ± 3.5

-10/19

Superior-inferior

0.9 ± 4.4

-14/13

Anterior-posterior

-0.8 ± 4.9

-19/14

  1. Measured deviations for all 184 (= 23 × 8) portal imaging controls (averaged over i = 1,..., 8 weekly portal images in j = 1,..., 23 patients). Mean values <...> in all three directions (left-right LR, superior-inferior SI, anterior-posterior AP) ± standard deviations SD and ranges, i.e. extremal deviations in ± orientations of the axes, in LR, SI and AP direction for setup error <Δsij>, prostate movement <Δmij> and total errror <Δtotij> are listed (see Fig. 2 for explanation of symbols).
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Radiation Oncology

ISSN: 1748-717X

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