Spoiled GRE with T2*-weighting
I'm confused. Isn't a spoiled-GRE sequence T1-weighted by definition?
|
|
|
This is a common misconception. Even though spoiled-GRE sequences are primarily used for T1-weighting, they can be used to create spin-density [H] and T2*-contrast by appropriate selection of parameters. In general this involves a long TR, long TE, and a small flip angle.
Because transverse coherences are purposely disrupted from cycle to cycle, spoiled-GRE sequences can only generate T2* (not T2)-weighted contrast. If more true T2-effects are desired, then one of the steady-state coherent sequences like True FISP or FIESTA would be preferred. |
T2*-weighted spoiled GRE image of the cervical spine. Multislice acquisition, TR=850, TE=27, α=5°.
|
References
Chavhan GB, Babyn PS, Jankharia BG et al. Steady-state MR imaging sequences: physics, classification, and clinical applications. Radiographics 2008;28:1147-1160.
Elster AD. Gradient echo imaging: techniques and acronyms. Radiology 1993; 186:1-8.
Chavhan GB, Babyn PS, Jankharia BG et al. Steady-state MR imaging sequences: physics, classification, and clinical applications. Radiographics 2008;28:1147-1160.
Elster AD. Gradient echo imaging: techniques and acronyms. Radiology 1993; 186:1-8.
Related Questions
Why would you want to use a spoiled-GRE technique? How do you pick the parameters?
What is True FISP, and why is it "truer" than regular FISP?
Why would you want to use a spoiled-GRE technique? How do you pick the parameters?
What is True FISP, and why is it "truer" than regular FISP?