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Imaging for Determining the Gross
Tumor Volume (GTV): CNS Tumors
Stefan Delorme
ESTRO Course: Target Volume Definition
Learning Objectives
•
To understand potential and limitations of
CT, MRI and PET for detection and
characterization of CNS tumors
•
CT
•
MRI
•
PET/CT
•
Functional imaging
CT
•
Not state-of-the-art for diagnosis, esp. low
grade glioma
•
For planning purposes and emergencies
•
Only if MRI not possible or available
•
Exceptions:
–
High grade glioma
–
Meningioma
–
AVMs
Slice orientation
Tumour
Contrast
medium
Grey matter
CSF
Bone
Image contrasts
Necrosis
White matter
Oedema
Slice by slice...
Frontal lobe
Pituitary stalk
Brain stem
Carotid artery
Temporal lobe
Cerebellum