After a 90-degree RF pulse, in which plane is the magnetization primarily oriented?

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Multiple Choice

After a 90-degree RF pulse, in which plane is the magnetization primarily oriented?

Explanation:
When a 90-degree RF pulse is applied, the net magnetization is tipped from the z-axis (along B0) into the plane perpendicular to B0. That plane is the transverse (xy) plane. With a 90-degree flip, the longitudinal component along z becomes zero, and all the magnetization lies in the transverse plane where it precesses and induces the MR signal in the receiver coil. The other planes aren’t used to describe the magnetization in this excitation scenario.

When a 90-degree RF pulse is applied, the net magnetization is tipped from the z-axis (along B0) into the plane perpendicular to B0. That plane is the transverse (xy) plane. With a 90-degree flip, the longitudinal component along z becomes zero, and all the magnetization lies in the transverse plane where it precesses and induces the MR signal in the receiver coil. The other planes aren’t used to describe the magnetization in this excitation scenario.

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