Diapositive 1

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3D-CRT

IMRT

p

V

ref

(cm

3

)

287

185

<0.0001

PTV_EVAL

D

max

(%)

105

103

<0.0001

D95 (%)

100

100

0.0759

CN

0.6

0.8

<0.0001

ipsilat_nontarget breast

V95 %)

9

3

< 0.0001

V50 (%)

40

31

< 0.0001

ipsilat_lung

V10 (%)

13

32

< 0.0001

V30 (%)

4

5

0.0058

contralat_breast

D5 (%)

1

5

< 0.0001

contralat_lung

V5 (%)

0.1

9

< 0.0001

heart (left sided lesion)

V5 (%)

16

9

0.0203

D5 (%)

9

8

0.4094

Dosimetric comparison between 3D-CRT and IMRT

CN: conformity number ( ≈ COIN)

Stelczer et al. ESTRO 33, EP-1572

The

IMRT

provided better results in dose conformation and

sparing the dose for the ipsilateral

breast

. However, advantages of

3D-CRT

were observed, especially in the

low dose region

.