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Table 2 Shift between irradiation effect and planned dose distribution

From: In vivo assessment of catheter positioning accuracy and prolonged irradiation time on liver tolerance dose after single-fraction 192Ir high-dose-rate brachytherapy

 

T1-w

T2-w

n =

47

49

Axial shift/mm

-5.3 ± 5.4

-5.6 ± 6.0

Orthogonal shift/mm

4.0 ± 2.5

4.6 ± 2.6

Total shift/mm

7.7 ± 4.4

8.4 ± 4.4

AC S

1.14 ± 0.43

1.04 ± 0.49

  1. Mean axial, orthogonal, and total shift between center coordinates of the irradiation effect and planned dose distribution in relation to the direction vector of catheter implantation for T1-w and T2-w MRI data. Both follow-up dates, 6w and 12w, were evaluated together. A negative value of the axial shift indicates a shift into the direction of the catheter entry site. T1-w = hepatocyte dysfunction, T2-w = interstitial edema, n = number of MR examinations assessed.