Physics Bucharest 2017

Breast margins – SIB-technique in Erasmus MC

residual set-up errors for 80 eNAL patients

Tumor bed (boost)

Whole breast

LR (mm) CC (mm) AP (mm) U (mm)  Th wall

V (mm) CC

σ

2.1

2.0

2.3

2.0

1.8

No corrections

M Σ

2.6

2.5

3.4

3.5

2.3

8.0

7.7

10.1

10.2

7.0

M=2.5Σ+0.7σ

eNAL markers

M Σ

0.8

0.6

0.9

1.9

2.1

3.5

2.9

3.9

6.2

6.5

M=2.5Σ+0.7σ

Clinical

M

5.0

5.0

5.0

5.0 mm LR, CC, AP

IJROBP 82, p1031–1037, 2012