Long-T2 Suppression with Low Flip-Angle b-SSFP Ultra-short TE (LA-bUTE)

A major technical difficulty for UTE imaging is the suppression of long-T2 signal to obtain positive contrast from ultra-short-T2 components. Variations of pre-pulse suppression and echo subtraction are currently the two approaches used to enhance short-T2 to long-T2-species contrast. A L ow flip- A ngle b -SSFP UTE ( LA-bUTE ) sequence is introduced to achieve up to 50% of long-T2 signal suppression without time penalty. It is also demonstrated that full suppression of long-T2-tissue can be achieved when combine LA-bUTE with traditional pre-saturation pulses with only slight increase on scan duration.

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