Fast spin echo sequence

Fast spin echo imaging involves a refinement of the basic spin echo sequence. Instead of eliciting a single signal echo after a 180° rephasing pulse in each cycle of length TR, fast spin echo imaging elicits several signals, an echo-train, by multiple 180° pulses after a single 90° pulse. Earlier echoes (TE < 20 ms) are used to form a proton-density-weighted image and those arriving later (TE > 80 ms) are used to form a T2-weighted image. This pair of dual-echo images provides complementary tissue contrast for no increase in scan time, making fast spin echo a favoured sequence.

Breaking Bulimia

Breaking Bulimia

We have all been there: turning to the refrigerator if feeling lonely or bored or indulging in seconds or thirds if strained. But if you suffer from bulimia, the from time to time urge to overeat is more like an obsession.

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