If a frequency encoding gradient is applied along the Y-axis, then the echo signal will be a projection against the:
A. ) X-axis.
B. ) Y-axis.
C. ) Z-axis.
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A longer pulse length will excite a:
A. ) narrower range of frequencies.
B. ) broader range of frequencies.
C. ) range of frequencies equal to the pulse time.
The width of the envelope of frequencies excited by an RF pulse is called the:
A. ) Excitation bandwidth.
B. ) Receiver bandwidth.
C. ) Truncated RF wave.
According the Bloch equation for Z-magnetization, the rate of change of Z-magnetization is:
A. ) equal to T1.
B. ) proportional to T1.
C. ) inversely proportional to T1.
Longitudinal relaxation generally occurs:
A. ) faster than transverse relaxation.
B. ) slower than transverse relaxation.
C. ) the same as transverse relaxation.
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