By P. Michael Conn
This quantity addresses present equipment in organic imaging, together with wide sections on MRI, CAT, NMR, puppy and different imaging strategies.
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When an ensemble of nuclei is excited with RF, a transverse component of magnetization, orthogonal to the applied field direction, may develop, and it is this component that then rotates and induces the MRI signal in a receiver coil. T2 reflects the time it takes for the ensemble to become disorganized and for the transverse component to decay. Since any growth of magnetization back toward equilibrium must correspond to a loss of transverse magnetization, all contributions to T1 relaxation affect T2 at least as much.