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Table 1 Individual center characteristics

From: SBRT for centrally localized NSCLC – What is too central?

General questionnaire items

Center type

Academic = 19

Public = 4

Private = 2

Non specified = 1

Median number of linear accelerators

3 (range 2 – 7)

Regular participation in thoracic oncology tumorboard

88%

Overall experience in SBRT of the centrally located NSCLC

0 cases = 3

<10 cases = 10

>10 cases = 13

Duration of SBRT experience

5 years (range: 1 – 15)

General treatment items

Imaging for target volume definition

4D-CT = 18

PET-CT = 21

Image guidance

CBCT = 24

TOMO = 2

Other = 2

Patient immobilization system

Body Fix/Frame = 11

vacuum matrass = 7

unknown = 7

Abdominal compression

3