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MRI Forum: T1 FAT SAT PRE AND POS GADO
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CLAUDIO RIBERTI

Tue. 24 Oct.06,
19:24
T1 FAT SAT PRE AND POS GADO
ANYBODY COULD GIVE ME A GOOD ANSWER WHY T1 FAT SAT IMAGES PRE AND POS GADO ARE SO DIFERENT CONCERNING TO THE MUSCULATURE, FAT AND OTHER STRUCTURES ?
THE MUSCLES ARE DARKER AND BETTER VISUALIZED,THE FAT COMES ALSO DARKER LIKE WE HAVE SEEN A SERIE WITH OTHER WEIGHT.
PS:.THE SERIES ARE EXACTLY THE SAME AND WERE PRINTED WITH THE SAME LEVEL AND WIDTH.
PS2:. IS THIS THE SAME THAT OCCURS IN T1 FAT SAT OF THE ANKLE WHERE THE LIQUID APPEARS BRIGHT ?
PS3:. HOW COULD I EXPLAIN BOTH ?

THANKS.

CLAUDIO
Renate Bloemer

Mon. 13 Nov.06,
19:29
 The contrast agent causes this difference. Contrast agents reduce the T1 time in tissues where they have accumulated depending on blood flow and vascular permeability. Caused by this, tissues after an application of contrast agents will differ in shortening of the T1 time, and the same imaging parameters result in other image appearance.
Some helpful links for musculoskeletal imaging and Fat Sat:
http://www.moffitt.org/moffittapps/ccj/v8n3/pdf/221.pdf
http://www.medical.siemens.com/siemens/en_US/gg_mr_FBAs/files/MRI_Hot_Topics/MRI_HotTopics_Skinny_on_FatSat_engl.pdf

Hope this helps
 
 

Renate Bloemer
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