Exam 14: Principles of Magnetic Resonance Imaging

T1 is also referred to as MXY.

Contrast is controlled by varying

Artifacts caused by anatomy "moves" can be remedied by

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

Ferromagnetic substances exhibit

T2 refers to the recovery of transverse magnetization.

In a strong magnetic field, hydrogen atoms can align

The magnetic moment describes the magnetic field characteristics of the

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

Paramagnetic substances exhibit

T2 is also referred to as spin-spin relaxation.

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

Fat has a long T1 and a long T2.

A T2-weighted image is useful for the evaluation of

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

All of the following are true regarding the gyromagnetic ratio EXCEPT

Diamagnetic substances exhibit

In what year was the first MRI scan performed?

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

T1 refers to the recovery of longitudinal magnetization.