What are the indication for MRI (diffusion weighted MRI ) ?

Nuclear machine studies

Indication:

• inactive intermittent, small/questionable CFS leak
• Leaks not revealed by CT cysternography.
• Detect presence rather than precise localization.
• Radio isotopes introduced in CSF by Lumbar Puncture /suboccipital to determine its distribution
• Localization may be improved by introducing pledgets into the different region of the nose and examining these with a gamma counter.

Different agents used in diffusion weighted MRI are:

• RAI-131
• RA iodinated serum Albumin(RISA)
• Ytterbium 169
• Diethylenetriamine penta acetic acid (DTPA)
• indium 11 -DTPA
• Tc-99m