Microsoft PowerPoint - TVD2017_Intro_VK_ws

Variation in Volume Definition for Postoperative RT in Stage III NSCLC An

international contouring study

2010

lobectomy

Pneumonectomy

Routine

Protocol

Routine

Protocol

Planning target

Lung

Mean dose (Gy)

V20 (%)

Heart

V45 (%)

Esophagus

Length 45 Gy (cm)

143-1342

8-26

12.7-54

0-20.5

4.5-11.5

297-382

11.6-15.3

20.6-29.2

1.6-5.1

6.8-9.5

187-1262

3.4-13.4

1.5-20.6

4.3-37

5.8-12

275-308

4-4.1

2.1-2.9

7.1-10

7.5-10.8

17 thoracic radiation oncologists contoured routinely or per protocol

Impact of a contouring protocol