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Imaging technology

Comparison of Novalis 6DOF setup

measured with ExacTrac or with CBCT:

Phantom experiments RMS <1.0 mm

and <1

°

. 11 spinal SBRT pats: RMS

<2.0 mm and <1.5

°

.

Pre-caution should be taken when only

ExacTrac X-ray 6D is used to guide SBRT

with small setup margins.

Chang R&O 95, 2010 p116-121