7. Calculate the 270° pulse width for a radio frequency field strength of 200 kHz. 8....
7. Calculate the 270° pulse width for a radio frequency field strength of 200 kHz.
8. What would be an approximate radio frequency excitation band width for a 90° pulse width of 1.25 microsecond?
Homework Answers
7.
The Flip angle (
), RF field
strength(B) and pulse width (t) are related as follows:
Hence, for a 270 flip angle, and B = 200 kHz, the pulse width t is
Hence, the pulse width is 3.75 microseconds.
8.
Using the same relation, the B value will give the excitation bandwidth.
t = 1.25 micro seconds.
= 90
Hence,
Hence, the excitation bandwidth for 90 pulse is 200 kHz.
Add Answer to:
7. Calculate the 270° pulse width for a radio frequency field
strength of 200 kHz.
8....
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