Imaging for Physicists

RF Coils (B 1 )

• Coil Usage:

Transmit and/or receive at

resonance • Properties

36.5

36

Cable loss, loading

35.5

Core Skin

Q factor ( ω / ∆ω ) Efficiency 1-Q L

35

33.5 Temperature ( o C) 34 34.5

/Q 0

Filling factor

33

32.5

• RF heating effects (SAR)

32

0

5

10

15

20

25

Time (min)