CMR

FOV

1/ no of voxels in the image

- for higher spatial res, use smaller FOV the higher the number the lower the sptial resolution

TR

No of views/segment

only relevant in Cine imaging

C

constant

receiver coil sensitivity to signal

Magnetization

Way in which RF pulses/gradients applied

intrinsic characteristics of magnetization

Volume of voxel

square root of time to acquire data

Signal

FOV

1/noise

TR

Higher receiver bandwidth reduces..

but also reduces SNR

only reduce TR for GRE for faster imaging

In spin echo TR affects image contrast hence dont change

RF duration

Shorten RF duratin by

Stronger slice select gradients

Shorter gradients

Higher transmitter bandwidths

constrained by max gradient strength

Thickness of slice desired

Assymetric RF pulses

TE

Faster slew rates

Stronger gradient

asymmetric/partial Echos with zero filling

Echo duration for sampling time

increase sampling freq to reduce

Stronger gradients

higher receiver bandwidths

NAcqs

NPE

1/ETL