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Alice Smart

G485 long essay question mark points
Medical questions
Protons have spin
Precess about the magnetic field produced by a strong electromagnet at a larmor
Transmitting coil produces a radio frequency equal to the larmor frequency
Protons resonate and flip to a higher energy state
When they…

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Alice Smart

Collimator ­ vertical tubes in lead that allow only parallel gamma photos to travel up
them, gamma photos not emitted at the desired point are absorbed by the lead this
makes the image sharper
Scintillator ­ contains fluorescent material that emits light photon when struck by a


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