Imaging for Physicists

RF Coils: Signal Characteristics

2 a x a I π

2

0 µ

(

) 2 2 4 2/3

B

=

Theoretical cylinder coils

+

π

SNR

a

Body Coil: Poor SNR Excellent uniformity

surface coils Surface Coil: Excellent SNR close to coil Poor uniformity

Distance

Finite Element Modelling used for complicated designs