165 / 1266
A complex technique….
Carrie M-SFOP 98 1998-2001
14/48 patients found on pre-RT review to have major targeting
errors
9 for eye blocks
5 for spinal field width
(Carrie, Int J Rad Onc Biol Phys 2005)
Packer A9961 1996-2000
421 eligible patients
21% with RT deviations
(Packer, JCO 2006)
QARC ACNS0331 April 2004-August 2005
Modifications requested in 40% of the first 53 cases