IMRT

Frameless vs. Invasive frame-based

l Verification images after each table rotation and prior each arc/beam l 6DOF positioning at particular table position Framebased SRS Frameless IGRT

Frameless IGRT with verification

Intrafractional error (3D)

< 1 mm

< 1,5 mm

< 1mm

Maciunas 1994 Lamba 2009 Ramakrishna 2010

Murphy 2003 Boda-Heggemann 2006 Guckenberger 2007 Lamba 2009 Ramakrishna 2010 Gevaert 2012

Hoogeman 2008 Gevaert 2013

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