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AMRI310 WK2 questions and answers rated A+ 2024
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AMRI310 WK2 questions and answers rated A+ 2024
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AMRI310 WK2 - larmor equation,vectors, resonance
When the RF pulse is removed, the spins interact with each other and some
speed up while others slow down. This is known as _________.
dephasing
Nuclei of opposite energy will ___________ each other's magnetic moments.
cancel out
There are always a few extra low energy nuclei that will not be canceled out.
These are known as the patient's ______________.
NMV
A MR active magnetic moment will have a _________ that is odd.
mass number
In MRI we use two units to measure field strength. One unit is Tesla. What is
the other unit?
gauss
, This is the time between the excitation pulse of a sequence and the resulting
echo used in the MR signal.
TE
This is the number of times that a periodic function or vibration repeats itself in
a specified time. It is usually measured in hertz (Hz), where 1 Hz = 1 cycle per
second.
frequency
T2 relaxation time is when
63% of the transverse magnetization has decayed
______ occurs after initial RF application, causing phase differences to
appear between precessing spins, resulting in decay of transverse
magnetization.
dephasing
We have an expert-written solution to this problem!
The _________ is defined as the resonant frequency, and is equal to the
product of the magnetic field and the gyromagnetic ratio.
precessional frequency
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