In-room imaging and MR planning

Magnetic moment and spin

• Consider charge q in circular motion:

Current:

v

A

t q

qv

i

=

=

q

2

r

r

Magnetic moment:

q

=

iA

=

L , L =

mvr

m2

• Rotating charged sphere with uniform charge:

q

=

S

m2

Spin!

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