- Sequence used to identify regions of fatty infiltration and help identify adenomas.
- aka chemical shift imaging
- Relies of differences in the precessional frequency of Hydrogen in fat and water molecules.
- Gradient echo image with TE set to a time where fat and water spins are 180 degrees out of phase causing fat and water signal components within a voxel to destructively interfere and reduce the brightness of the pixel.
- Degree of signal change depends on the ration of fat/water. All fat or all water, no signal drop (compared to in-phase image) 50/50 causes total signal loss
- OOP images identified by dark bands at fat water interfaces
- Select the shortest OOP TE to get best T1 contrast and largest number of slices
- Exact TE depends on filed strength
T1 Out of Phase (OOP) images in Abdominal imaging
Subscribe to:
Post Comments (Atom)
Popular Posts
-
3-PLANE LOC AXIAL T1 AXIAL T2 FS CORONAL T1 CORONAL STIR Axial T2 high resolution FIESTA ( Facial Nerves in IAC for any space occu...
-
Normal MRI Anatomy The pectoralis tendon is best seen on axial T1 and T2-weighted images as a curvilinear low-signal band inserting o...
-
MRI of the Right Lower Leg Clinical details: Technique: Multiplanar multisequence study including T1,T2, STIR and GRE weigh...
-
MP-RAGE stands for Magnetisation Prepared RApid Gradient Echo. MP-RAGE is a 3DFT contrast prepared gradient echo sequence. The T1 weig...
-
General Indications- athletic pubalgia, sports hernia Closed General MRI Cor STIR Cor T1 ...
-
Definition: The type of MRI sequence used to identify areas of an organ, such as the brain, which have recently been damaged or injured. ...
-
Fast STIR MRI sequence structure . This is analogous to FLAIR sequence, except that TI time is shorter to null fat signal, and low-ampli...
-
Axial Plane: Prescribe plane perpendicular to midshaft of the proximal phalanx of the thumb. Scan from 1st carp-metacarpal joint th...
No comments:
Post a Comment