T1 after contrast: why it is usually fat-suppressed
Enhancement is easy to miss when fat is also bright. This is why the post-contrast T1 uses fat suppression and what to check.
T1 after contrast (usually fat-suppressed)
Bright where gadolinium collects: vessels, tissue with a rich blood supply, inflammation, and brain tissue whose blood-brain barrier is broken.
Separates solid from cystic, viable from necrotic, abscess from phlegmon, scar from recurrent disc; shows meningeal and nerve disease.
Needs fat suppression wherever fat surrounds the lesion, and never STIR. In the brain, a delay of several minutes improves small lesions.
This page is one entry from the MRI Technologist Reference
The full reference has 31 protocols, 9 dynamic study timelines, 19 artifacts, 16 scanner problems and 15 safety topics, as a PDF in English and Arabic plus an interactive tool.
Educational reference. It does not replace your site protocols, the radiologist's instructions, the MR safety officer, or the manufacturer's instructions for any implant, device or contrast agent. Parameter values are typical starting points at 1.5 T and must be adapted to the scanner, coil and patient.