SNR
what is SNR
signal to noise ratio
what is the formula for spin echo
TR*PHASE MATRIX*NEX
* WHEN YOU GET THE ANSWER DIVIDE BY 1000 THEN DIVIDE THAT BY 60* FOR THIS SCAN TIMES
reducing bandwidth will do what to SNR
increase SNR
What is the formula for fast spin echo
TR*PHASE MATRIX* NEX -DIVIDED BY ETL
*WHEN YOU GET THE ANSWER DIVIDE BY 1000 THEN DO NOT DIVIDE THAT BY 60* FOR THIS SCAN TIMES
increase in FOV will do what to SNR
increase SNR
What is the formula for a gradient echo 2D
TR*PHASE MATRIX*NEX
decreasing TR will do what to SNR
lower SNR
What is the scan time formula for a gradient echo 3d acquisition
TR*PHASE MATRIX*NEX*#SLICES
A sequence with 2 NEX, increased to 6 NEX would have an increase in SNR of what amount
square root of 3
Spin Echo Sequence with parameters 450 TR, 20 TE, 224 x 224 matrix, 20cm FOV and 3 NEX. Your scan time would be
450 x 224 x 3 = 302400 milliseconds. therefore your scan time would be 5 minutes and 2 seconds.