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8
8
T1 with i.v. contrast
May obscure enhancing lesions
surrounded by fat !!
T1 + C
T1
T1 + C + Fat Suppression (FS)
Improved delineation of enhancing lesions
surrounded by fat
T1 + C
T1 + C + Fat Suppression (FS)
Improved delineation of enhancing lesions
surrounded by fat
T1 + C
T1 + C +
FS
T2
Lesion detection
T1
T2
Technique
Classic sequences:
T1
–
Without / with i.v. contrast
–
Fatsuppressed
T2
New sequences
Diffusion weighted imaging
DWI
: May be helpful in narrowing of
differential diagnosis
Restricted diffusion seen in
–
Benign lesions e.g.
•
Cholesteatoma, epidermoid
–
Malignant lesions e.g.
•
(Head & Neck) Cancer
•
Lymphoma, leukemia, metastasis