WEDGE FACTORS - DEPENDENCE ON DEPTH AND FIELD SIZE

Authors
COZZI AF COZZI L GARAVAGLIA G
Citation
Af. Cozzi et al., WEDGE FACTORS - DEPENDENCE ON DEPTH AND FIELD SIZE, Radiotherapy and oncology, 39(1), 1996, pp. 31-34
Citations number
14
Categorie Soggetti
Oncology,"Radiology,Nuclear Medicine & Medical Imaging
Journal title
Radiotherapy and oncology → ACNP
ISSN journal
01678140
Volume
39
Issue
1
Year of publication
1996
Pages
31 - 34
Database
ISI
SICI code
0167-8140(1996)39:1<31:WF-DOD>2.0.ZU;2-F
Abstract
Wedge factor (WF) variation with field size and depth has been analyse d for 6 and 15 MV X-ray beams. The measured field size effect is 1.4% in the worst case, whereas the WF shows a linear dependence with depth giving a maximum variation of 0.22%/cm (60 degrees wedge, 6 MV beam). An empirical correction for WF depth dependence on wedge thickness is proposed.