Gynae BT 2017

Accurate contouring Pre-requisite for success of highly conformal RT but not that easy !

A. Bladder

Uncertainty bladder:  3 mm

50

L1

L2 V2

L3 V3

40

V1

30

20

IDD (mm)

10

0

180,0 B. Rectum

120,0

60,0

0,0

-60,0

-120,0

Angle (degrees)

Uncertainty Rectum: up to  5 mm

50

L1 V1

L2 V2

L3 V3

40

30

20

IDD (mm)

10

0

180,0

120,0

60,0

0,0

-60,0

-120,0

Angle (degrees)

C.Sigmoid colon

Uncertainty sigmoid colon: up to several cm!

50

L1 V1

L2 V2

L3 V3

40

30

20

IDD (mm)

10

0

180,0

120,0

60,0

0,0

-60,0

-120,0

Angle (degrees)

Petric P, et al. Eur J of cancer 2013;49(2):S726 (Abstract; ECCO/ESMO/ESTRO, Amsterdam 2013)