echo train

echo train

A series of 180° radiofrequency rephasing pulses and their corresponding echoes for a fast spin echo (FSE) pulse sequence.

echo train

(ĕk'ō trān)
Series of 180-degree rephasing pulse and echoes in a fast-spin echo pulse sequence used in magnetic resonance imaging.
References in periodicals archive ?
Publishing, 2007) and Echo Train (Salt Publishing, 2010).
Now it might be asked that if the length of the echo train determines the speed of the sequence, why not always use the longest echo train possible?
Thus, increasing the echo train to decrease imaging time will typically increase image blurring.
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13,14) Acquiring this sequence as an echo train permits shortening the sequence from 15 min to 4 to 5 min.
THE steam engine star of a famous British film will be back in Liverpool after 44 years to haul a special ECHO train.
THE steam engine which starred in the famous British film Night Mail will haul a special ECHO train from Liverpool next month.
increasing the echo train length, ETL) and reducing the time between successive magnetization pulses (decreasing repetition time, TR).
In addition, there is clear evidence that FONAR's Fast Spin Echo increased the scanner's echo train length and further reduced patient scan times.
Finally, because the phase-encoding signals from shorter T2 tissues acquired at the end of the echo train have low signal intensity, these tissues may be blurred on "fast" images.
It will work the ECHO trains to NRorth Wales and the Settle & Carlisle Railway from a pool of locomotives including Duchess of Sutherland, Oliver Cromwell and Union of South Africa.