Skip to main content

Table 4 Mean doses given in Gy for OARs with VMAT in comparison, normalized to 35.2 Gy

From: Pediatric craniospinal irradiation with a short partial-arc VMAT technique for medulloblastoma tumors in dosimetric comparison

 

This study

Myers et al. [30]

Seravalli et al. [25]a

Parker et al. [31]

Myers et al.

Seravalli et al.

CTV-PTV margin spine in mm

5.0 circular

7.0 circ.

5.0 circ

3.0 circ.

7.0 circ.b

5.0 circ

N [age]

6 [5–16 y]

24 [2–18 y]

1 [14 y]

1 [19 y]

24 [2–18 y]

1 [14 y]

No. of isocenters

2

2

3

1

1

1

Partial arc + AVD

Yes

No

Yes

No

No

No

Organ/technique

VMAT_AVD

VMAT

VMAT

HT

HT

HT

Heart

6.6 [5.8–7.0]

6.6 ± 1.1

6.8 [5.6–10.7]

10.8 [N.A]

7.1 ± 1.1

9.2 [7.5–11.6]

Thyroid

8.7 [7.6–9.9]

12.8 ± 1.2

12.7 [5.5–24.1]

24.4 [N.A]

11.3 ± 1.8

15.0 [6.8–19.3]

Lungs

7.5 [7.0–7.9]

9.6 ± 1.4

8.9 [7.9–9.8] c

5.9 [N.A]

8.2 ± 1.4

8.0 [7.0–8.7] c

Kidneys

5.3 [4.7–5.8]

7.8 ± 0.9

6.4 [5.6–8.5] c

6.4 [N.A]

7.9 ± 1.7

6.1 [5.2–6.5] c

Liver

5.7 [5.2–6.3]

6.8 ± 0.9

N.A

7.8 [N.A]

6.6 ± 0.6

N.A

  1. VMAT_AVD volumetric modulated arc therapy with avoidance sectors, circ. circular, y years, N number of patients, No. number of, N.A. data not available, ± given SD., [w.x–y.z] range, HT helical tomotherapy
  2. aValues are median mean dose
  3. bCTV = spinal cord without nerve roots
  4. cAverage of right and left organ part