2017_SBRT_Course Book
Imaging for target and OAR definition
Dahele IJROBP 2011
CT
MRI T2
MRI T1
CT imaging: • Slice thickness 1- 2mm MRI imaging: • T1 with and w/o Gadolinium contrast • T2 • Slice thickness ≤ 3mm or volumetric image acquisition
ESTRO SBRT 2017 - Matthias Guckenberger
07.09.17
21
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Average differences between 5 institutions (mm) X-axis Y-axis Z-axis CT & MRI image registration
1.1
0.8
1.3
Average
Range between 5 institutions (mm)
2.4
1.8
3.0
Average
Toussaint Radiat Oncol 2016
• Rather large inter-observer variability Ø Automatic image registration between CT and MRI images not reliable Ø Manual adjustment / correction of image registration
ESTRO SBRT 2017 - Matthias Guckenberger
07.09.17
22
/
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