Prescribed Parameters: Echo spectral width Echo Time (msec) Repetition Time RF pulse duration # of lobes in RF pulses Phase encode time (tped = 0.002) Slice Thickness Field of view- Matrix size Image 1 100 KHz 15 .5 sec 2 msec 5 2 msec 2 mm 120 mm 128x128 Image 2 50 KHz 30 .5 sec 2 msec 5 2 msec 6 mm 120 mm 128x128 Parameter Image 1 Image 2 G/cm or msec 3 KHz 3.52 G/cm 1.76 G/cm 1.957 G/cm 0.626 G/cm .00978 G/cm 1 RF Pulse Bandwidth 2 Slice select gradient GSS 3 Slice rewind gradient 4 Freq. Encoding Gradient 5 Freq. Dephase Grad. Ampl (assume rectangular) 6 Phase Encode Step Size AGpe (assume zero rise time gradient pulse) 7 Total acquisition time for each echo. 8 Dwell time (sample time) 9 Resolution 10 Delay 1 (msec) 11 Delay 2 12 TR Delay 1.28 msec 10 microsec .9375 mm 3.5 msec 5.86 msec 483.36 msec Note: the Varian system uses half-sine shaped pulses for PE and Freq. dephase. Its pulse amplitudes will be greater by a factor of 1/2. Prescribed Parameters: Echo spectral width Echo Time (msec) Repetition Time RF pulse duration # of lobes in RF pulses Phase encode time (tped = 0.002) Slice Thickness Field of view- Matrix size Image 1 100 KHz 15 .5 sec 2 msec 5 2 msec 2 mm 120 mm 128x128 Image 2 50 KHz 30 .5 sec 2 msec 5 2 msec 6 mm 120 mm 128x128 Parameter Image 1 Image 2 G/cm or msec 3 KHz 3.52 G/cm 1.76 G/cm 1.957 G/cm 0.626 G/cm .00978 G/cm 1 RF Pulse Bandwidth 2 Slice select gradient GSS 3 Slice rewind gradient 4 Freq. Encoding Gradient 5 Freq. Dephase Grad. Ampl (assume rectangular) 6 Phase Encode Step Size AGpe (assume zero rise time gradient pulse) 7 Total acquisition time for each echo. 8 Dwell time (sample time) 9 Resolution 10 Delay 1 (msec) 11 Delay 2 12 TR Delay 1.28 msec 10 microsec .9375 mm 3.5 msec 5.86 msec 483.36 msec Note: the Varian system uses half-sine shaped pulses for PE and Freq. dephase. Its pulse amplitudes will be greater by a factor of 1/2