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Table 2 Summary of Organs at risk

From: Single fraction radiosurgery using Rapid Arc for treatment of intracranial targets

Patient No.

1

2

3

4

5

6

7

8

9

10

Technique

CAT

RA

CAT

RA

CAT

RA

CAT

RA

CAT

RA

CAT

RA

CAT

RA

CAT

RA

CAT

RA

CAT

RA

Healthy brain D mean [Gy]

0.1

0.3

0.4

0.5

0.6

3

1.0

1.4

2.1

5.2

0.3

0.6

0.6

0.7

0.6

1

1.3

3.2

0.5

2.2

V 2Gy [cm 3 ]

8.6

53

59.5

104.8

68.7

860.3

316.8

394.4

92.3

145.7

37.6

99.9

100.8

105.7

99.6

367.6

223.7

1057

71.4

601

OAR Dmax [Gy]

                    

Lens left

0.0

0.5

0.0

0.1

0.1

1.3

0.0

1.3

0.6

0.1

0.3

0.2

0.0

0.0

0.0

1.9

0.6

0.3

0.3

0.6

Lens right

0.0

0.4

0.0

0.1

0.0

1.4

1.1

2.5

0.6

0.0

0.0

0.1

0.0

0.0

0.0

1.3

0.0

0.3

0.3

0.6

Brainstem

0.4

1.5

3.7

6.9

0.5

7.1

2.3

3.4

0.8

0.7

0.5

0.8

0.9

0.1

4.9

4.9

2.0

1.2

0.9

2.1

Chiasm

0.0

0.9

0.5

3.8

0.1

3.8

0.7

2.5

0.6

0.0

0.0

0.4

0.0

0.1

1.2

4.2

1.4

1.7

0.0

1.7

N. opticus right

0.0

0.6

0.0

0.2

0.2

3.2

2.4

1.4

0.7

0.1

0.0

0.3

0.0

0.0

0.3

2.6

0.5

1.0

0.4

1.3

N. opticus left

0.0

0.9

0.5

0.3

0.2

3.7

0.0

0.9

0.8

0.1

0.5

0.3

0.0

0.0

1.2

4.6

1.4

1.0

0.5

1.4

  1. Healthy brain (Dmean), low-dose volume (V2 Gy) for all patients and both treatment techniques. The maximum dose to OAR is shown in Gy, the mean dose to healthy brain in Gy, and the low dose volume (volume which is irradiated with maximum of 2 Gy) in cm3.
  2. OAR = organs at risk, CAT = conformal arc therapy, RA = Rapid Arc, Dmean = mean dose, V2 Gy = volume irradiated with 2 Gy or higher, Fat marked fields indicate a benefit for this value