Imaging studies included sagittal SPAIR sequence (TR/TE, 2538 ms/70 ms; TI, 110 ms; echo train
length, 19; FOV, 280 mm; matrix, 320x218; NEX, 1; acquisition time, 1:33 min; slice thickness/gap, 4 mm/0.4 mm) and T2 Dixon sequence (TR/TE, 2208 ms/10 ms; echo train
length, 22; FOV, 283 mm; matrix, 380x262; NEX, 1; acquisition time, 2:20 min; slice thickness/gap, 4 mm/0.4 mm).
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
In a CPMG echo train
acquired to investigate the transverse NMR relaxation, the rate of signal decrease shortly after the signal excitation is larger than at later times.
560ms, echo train
length was 3, band width was approx.
As shown in Figure 2, the FLAIR version of low SAR FSE sequence with long echo train
(80-100) and low refocusing flip angles produces similar DBS appearance and is useful for imaging of infections and other complications.
Publishing, 2007) and Echo Train
(Salt Publishing, 2010).
Parameters for T1WI were as follows : SE sequence, acquisition time; 4min48sec, repetition time(TR) msec/echo time(TE) msec; 500/12.6, Echo Train
Length(ETL);1, number of phase/frequency encode (PP/FE); 512,512, Flip Angle(FA); 90deg, slice thickness; 3mm with 0.3mm spacing, acquisition matrix(Mx); 512*512, FOV; 22x22 cm.
If 10 lines of k-space (an "echo train
" of 10) are filled during this time (eg, at 10, 20, and up to 100 msec), the sequence can be completed 10 times as quickly.
FSE has the ability to incorporate extended echo train
length (ETL), which increases the number of echoes produced per repetition time.
Certain imaging parameters were held constant during the study for CSE, (field of view, 100A-100 mm; number of acquisition,1; slice thickness,4mm; percentage sampling, 100; pixel per mm resolution, 1.280), 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