with TR the repetition time
between successive RF pulses as shown in Figure 1, [alpha] the flip angle, and [n.sub.s1] the total number of slices.
The spin echo pulse sequence was a T1-weighted sequence with a repetition time
of 750 ms, echo time of 20 ms and matrix resolution of 230 x 290.
All the cases were examined in the supine position with standard circularly polarized head coil using the following sequences and parameters: axial T1WI spin echo (repetition time
ms/echo time ms 659/12 ms, 256x256 matrix, 3 mm section thickness, 280 mm field of view, one signal acquired).
Sakroiliak eklem MRG teknigi: Aksiyal T1A FSE (repetition time
[TR]: 520 msec., echo time [TE]: 15 msec., matriks: 320x256, FOV: 220x220mm, NEX:2, FA:90[degrees], kesit kalinligi:4mm).
Experimental variations in imaging parameters were performed in echo time and repetition time
. The quantitative analysis consisted of contrast-to-noise ratio.
The value of the highest possible efficiency is determined by the ratio of the power of three-phase resistive short circuit [P.sub.sc] to the average calculated in the repetition time
period, useful active load power [P.sub.usf] :
([T.sub.R])=4000 ms, echo time ([T.sub.E])=12, 24, 36, 48, 60 and 72 ms, number of echoes (NE)=6, matrix size=512x384, pixel band width=230, slice thickness=2.5 mm, number of excitations (NEX)=3 and field of view=25 cm.
For measuring metabolic [T.sub.2], 14 TEs were varied between 58-110 ms, and the repetition time
(TR) was set to 7.2 s.
In this research we compared volume load (sets x repetition x load) and work considering time under tension (volume load x repetition time