bright T1 lesion
(short T1)
- fat (lipoma, dermoid)
- sub-acute hemorrhage (metHb)
- paramagnetic agent (Gd, ? post. pituitary)
- proteinaceous fluid (colloid cyst)
- metastatic melanoma (melanotic)
most abnormalities cause long T1 + T2 ("dark/bright")
see also: dark T2 lesion
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© 2002, C.E. Kahn, Jr.
2002-04-18