A Quantum Mechanical Review of Magnetic Resonance Imaging
  In this paper, we review the quantum mechanics of magnetic resonance imaging (MRI). We traverse its hierarchy of scales from the spin and orbital angular momentum of subatomic particles to the ensemble magnetization of tissue. And we review a number of modalities used in the assessment of acute ischemic stroke and traumatic brain injury. 
Stephen G. Odaibo
physics.med-ph