FLASH(SPGR/T1-FFE/RF Spoiled SARGE/RSSG/FAstFE/S Tage/T1-FAST) Post GD
MRI image appearance
The easiest way to identify T1 FLASH post gadolinium images is to look for blood vessels in the body (e.g., arteries and veins in the brain, neck, chest, abdomen, upper limbs, and lower limbs). Blood vessels and pathologies with high vascularity appear bright in T1 FLASH post gadolinium images. All the other characteristics of the T1 FLASH post gadolinium images remain the same as the T1 FLASH images.
Tissues and their T1 FLASH post gadolinium appearance
Fluids : – dark (Ureters and bladder appear as bright due to the contrast excretion)
Bone marrow : – equal to or higher than that of muscle (fatty marrow is usually bright)
Muscles- gray
Kidneys :- bright
Liver :-bright
Spleen :- bright
Pancreas :- bright
Bowel walls :- bright
Prostate :- bright
Uterus:- bright
Moving blood : – bright
White matter : – whiter
Gray matter : – gray
Bone : – dark
Fat : – bright
Air : – dark
Use
- Very useful for angiography imaging
- Useful for small bowel imaging
- Useful for urography imaging
- Useful for pancreas imaging
- Useful for liver imaging
- Useful for kidney imaging
- Useful for abdominal imaging
- Useful for chest imaging
- Useful dynamic pelvis imaging
- Useful for extremity 3D imaging
* Most of the abdominal imaging uses fat saturated FLASH sequences except a few angiography imaging *
Pathological appearance
Pathologies with hypervascularization will appear bright on T1 FLASH post-gadolinium images (e.g. tumors like hemangioma, lymphangioma, hemangioendothelioma, Kaposi sarcoma, angiosarcoma, hemangioblastoma, etc.), and inflammatory processes like discitis, meningitis, synovitis, arthritis, osteomyelitis, etc. Pathological processes with no vascularity will remain unenhanced (appearing dark in a T1 FLASH post-gadolinium image).
FLASH CORONAL POST CONTRAST SEQUENCE USED IN SUBCLAVIAN ANGIOGRAPHY IMAGING
FLASH CORONAL POST CONTRAST SEQUENCE USED IN ABDOMINAL ANGIOGRAPHY IMAGING
FLASH CORONAL POST CONTRAST SEQUENCE USED IN UPPER LEGS ANGIOGRAPHY IMAGING
FLASH CORONAL POST CONTRAST SEQUENCE USED IN LOWER LEGS ANGIOGRAPHY IMAGING
FLASH AXIAL POST CONTRAST SEQUENCE USED IN UNCOOPERATIVE PATIENTS BRAIN IMAGING
