Exam 14: Principles of Magnetic Resonance Imaging

If energy is delivered to the hydrogen nuclei at a different frequency than that of the Larmor frequency of the nucleus, then

All of the following are true about spin-up nuclei EXCEPT

A T2-weighted image is useful for the evaluation of

All of the following are true regarding the gyromagnetic ratio EXCEPT

T1 refers to the recovery of longitudinal magnetization.

The magnetic moment describes the magnetic field characteristics of the

T2 refers to the recovery of transverse magnetization.

A nucleus with an even number of protons and neutrons has a magnetic moment of

Ferromagnetic substances exhibit

In what year was the first MRI scan performed?

There is a risk of thermal injury with MRI.

Which scan parameter determines the amount of time between each initial RF pulse used to excite the protons in a given region of anatomy?

T1 is also referred to as MXY.

The most common MRI scanner used in clinical practice has a magnet strength of

Fat has a long T1 and a long T2.

Artifacts caused by anatomy "moves" can be remedied by

T2 is also referred to as spin-spin relaxation.

When an RF pulse is applied and its energy is absorbed, the net magnetization vector moves from

Diamagnetic substances exhibit

Paramagnetic substances exhibit