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Monday, April 25, 2011

MRI take home point (2)

  •  The smaller the receive coil, the higher the sensitivity
  •  High-field MRI systems use superconducting magnets to produce highly uniform magnetic fields over the body.
  •  Radiofrequency transmitter and receiver coils are required to excite tissue and to measure the signal emitted from tissue.
  •  Magnetic gradients applied in three orthogonal directions are used to localize the sources of signal in MR images.
  •  The MRI pulse sequence describes the RF pulses sent into the patient, the gradient manipulations, and the signal measurements taken by the MRI system to produce an MR image – the scale of T1, T2.

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