2016_Head & Neck COURSE BOOK

T1 + C + Fat Suppression (FS)

T1 with i.v. contrast

 Improved delineation of enhancing lesions surrounded by fat

 May obscure enhancing lesions surrounded by fat !!

T1 + C

T1 + C

T1

T2

T1 + C + Fat Suppression (FS)

 Lesion detection

 Improved delineation of enhancing lesions surrounded by fat

T1

T1 + C + FS

T2

T1 + C

Diffusion weighted imaging

Technique

Classic sequences:  T1

 DWI : May be helpful in narrowing of differential diagnosis

– Without / with i.v. contrast – Fatsuppressed

 Restricted diffusion seen in – Benign lesions e.g. • Cholesteatoma, epidermoid – Malignant lesions e.g. • (Head & Neck) Cancer • Lymphoma, leukemia, metastasis

 T2

 New sequences

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