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Table 1 Hemithoracic irradiation: plan characteristics for Reg 2.5, Reg 5.0 (“regular” delivery with a 2.5 cm and 5.0 cm field width) and DJDC 5.0 (dynamic jaw/dynamic couch delivery with a 5.0 cm maximum field width)

From: Accelerated large volume irradiation with dynamic Jaw/Dynamic Couch Helical Tomotherapy

  

Reg 2.5

Reg 5.0

DJDC 5.0

PTV

D99 (Gy)

48.6 ± 0.6

49.5 ± 1.0

48.7 ± 0.6

 

D1 (Gy)

56.0 ± 0.5

57.7 ± 1.3

55.9 ± 0.2

 

CI95

1.14 ± 0.08

1.19 ± 0.06

1.16 ± 0.05

 

UI

1.06 ± 0.03

1.09 ± 0.04

1.06 ± 0.00

 

TV95%

0.967 ± 0.015

0.975 ± 0.009

0.967 ± 0.004

liver

mean (Gy)

20.1 ± 9.1

20.7 ± 9.4

19.9 ± 10.1

ipsilateral kidney

mean (Gy)

8.8 ± 3.0

8.3 ± 2.9

8.4 ± 2.6

contralateral kidney

mean (Gy)

4.0 ± 1.2

3.6 ± 0.9

3.3 ± 1.2

contralateral lung

mean (Gy)

6.1 ± 0.6

6.2 ± 0.7

6.0 ± 1.0

spinal cord

max (Gy)

35.0 ± 6.2

32.3 ± 0.9

34.1 ± 2.1

heart

mean (Gy)

26.5 ± 4.8

26.9 ± 6.9

26.7 ± 5.3

esophagus

mean (Gy)

32.0 ± 3.2

32.5 ± 1.2

31.5 ± 3.1

integral dose

(Gy x l)

411.4 ± 24.5

513 ± 110.9

414.6 ± 31.3

  1. No statistically significant differences could be detected in dose distribution in the PTV and sparing of organs at risk.