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11 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is Law of electromagnetic induction |
State that if two of these (motion, magnetism, and charge) are present, then the third is automatically induced. |
By Micheal FaradayWhat |
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What is protium |
Is the isotope of the hydrogen nucleusWhat |
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What is the net magnetization vector (NMV) |
Is a nuclei that produces a significant magnetic vector (like hydrogen) that is used in clinical MRI. |
The net magnetic moment of the patient. |
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What is the Larmor equation? |
W.=B. * ^
W. = precessional frequency B. = Magnetic field strength of the magnet ^ = gyromagnetic ratio |
^ = upside down y |
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What is the gyromagnetic ratio of hydrogen? |
42.57 MHz/T |
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What is resonance? |
A phenomenon that occurs when an object is exposed to an oscillation object that has a frequency close to its own. |
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What is free induction decay (FID) signal? |
The magnitude of transverse magnetization decreases, so does the magnitude of the voltage induces in the receiver. |
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What is the process of recovery of longitudinal magnetization called |
T1 recovery |
T1 or T2 |
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What is the process of decay of the transverse magnetization called |
T2 decay |
T1 or T2 |
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What determines the amount of longitudinal relaxation that is allowed between the end of one RF and the next. |
Repetition time (TR) |
Determines the T1 relaxation |
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What determines how much decay of the transverse magnetization is allowed to occur |
Echo time (TE) |
T2 decay |
