Vengono analizzate le principali innovazioni tecnologiche che, a partire dalle classiche sequenze spin-eco, hanno permesso di ridurre i tempi di acquisizione delle immagini in corso di indagini di RM. In particolare sono state considerate le tecniche di acquisizione con angolo di eccitazione inferiore a 90°. Di ciascuna viene sottolineata la strategia di implementazione, le difficoltà che è stato necessario superare e le possibili potenzialità positive nell'applicazione clinica.
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