Imaging parameters which were held constant during the study for CSE, FSE, FLAIR in T1-weighted study (field of view, 100x100 mm; number of acquisitions, 1; slice thickness, 4 mm), FLAIR (inversion time, 400 ms; echo train
length, 7) and FSE (echo train
The transverse relaxation was measured on acquisition of an echo train
with Carr-PurcellMeiboom-Gill (CPMG) pulse sequences.
560ms, echo train
length was 3, band width was approx.
Publishing, 2007) and Echo Train
(Salt Publishing, 2010).
6, Echo Train
Length(ETL);1, number of phase/frequency encode (PP/FE); 512,512, Flip Angle(FA); 90deg, slice thickness; 3mm with 0.
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
FSE has the ability to incorporate extended echo train
length (ETL), which increases the number of echoes produced per repetition time.
reduces echo train
length, resulting in fewer artifacts in EPI
280), FLAIR(inversion time, 860 ms; echo train
length, 5) and FSE (echo train
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 effective TE determines the echo train
length (ETL) based on echo spacing (ESP).