Spin Echo ·
90° → dephase → 180° → echo
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.com · Bloch sphere · Larmor precession · Hahn refocusing
Echo time
TE = 2τ
Signal
—
phase
—
Fast spins (lead)
Slow spins (lag)
Net magnetization M
RF pulse (90° / 180°)
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.com · Spin Echo