617 / 1311
MRI
•
State-of-the art for detection, delineation,
and characterization
•
Functional imaging, incl.
–
MR angiography
–
Perfusion
–
Flow
–
Neurofunctional MRI (BOLD)
–
Diffusion imaging (DWI+DTI)
–
MR spectroscopy
Bright:
Short T1:
Fat
Hematoma (depending on age !)
Contrast medium: Disturbance
of blood-brain barrier
Proteins
Dark:
Long T1:
Water
Bone, Calcium
Moving blood
Air
Fat
Gd-DTPA
Brain
CSF
Bone
Tumour
Image contrasts: T1-weighted
Bright:
Long T2:
Fat
Hematoma (Methemoglobin)
Fluid
Most tumours
Dark:
Short T2:
Contrast medium
Bone, Calcium
Hematoma (Hämosiderine)
Moving blood
Air
CSF
Brain
Bone
Vessels
Oedema
Tumour
Image contrasts: T2-weighted
Image Contrasts: FLAIR
FL uid
A ttenuated
I nversion
R ecovery
= T2 with dark fluid
Tumour
CSF
Bright:
Fat
Fluid
Tumours
Dark:
Blood flow
Air
Bone
Image contrasts: Proton-weighted
Grey matter
White matter
Oedema
Intracranial tumors
•
Intraaxial
–
Supratentorial
»
Glioma
»
Lymphoma
»
Metastases
–
Infratentorial
»
Glioma
»
Medulloblastoma
»
Ependymoma
»
Hemangioblastoma
•
Extraaxial
–
Supratentorial
»
Meningioma
»
Pituitary
adenoma
»
Bone tumors
»
Meningial
metastases
–
Infratentorial
»
Schwannoma
»
Meningioma
»
Epidermoid
»
Chordoma