- 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
Popular Posts
-
Axial Plane: Prescribe plane perpendicular to midshaft of the proximal phalanx of the thumb. Scan from 1st carp-metacarpal joint th...
-
Normal and a rupture Achilles tendon MRI images Achilles tendon MRI image-yellow arrow Green-normal Achilles tendon MRI image ...
-
MR Arthrogram Protocol Axial T1 SE Axial T1 SE (fat sat) Sagittal Obl T1 SE (fat sat) Coronal Obl T1 SE (fat sat) Coronal Obl T2 TSE ...
-
Normal MRI Anatomy The pectoralis tendon is best seen on axial T1 and T2-weighted images as a curvilinear low-signal band inserting o...
-
ABER Protocol for MRI Shoulder Align from coronal scout perpendicular to glenohumeral joint line (perpendicular to glenoid) Ideally th... -
MRI Prostrate Spectroscopy SINGLE VOXEL Planning --> MRI Prostrate Spectroscopy MULTI VOXEL Planning
-
--> Patients are positioned in the supine or left decubitus position. Claustrophobic reactions have not been observed to a higher...
-
MRI OF THE RIGHT ANKLE JOINT. Clinical details: Fall and twisting injury to the Right Ankle 8 months ago. Now pain around the Ank...
-
Horizontal long axis: known as a 4-chamber view. Short axis plane-multiple/contiguous Vertical long axis: known as a 2-chamber view ...
No comments:
Post a Comment