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Signa GE 1.5 T  LX 9.1 protocols

 

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GE 1.5 T LX 9.1 MSK Protocols

 

SHOULDER
Shoulder coil. 50 mm. saturation band oblique over the chest. TRF = tailored radiofrequency
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase (%) Bw (KHz) Other Max. # Slices Avail. # Slices Needed time
cor T1 700/25 - 14 512*224 - 4/1 2 AP ON 100 15.6 - 15 15 5:23
cor obl T2 fs 3000/60 8 14 256*256 - 4/1 3 AP ON 100 15.6 - 18 15 4:54
sag obl T2 5000/85 8 14 256*256 - 4/1 2 AP ON 100 15.6 - 21 16 4:54
sag obl T2 fs 3000/60 8 14 256*256 - 4/1 3 AP ON 100 15.6 - 18 16 4:54
ax PD fs 2500/35 6 14 256*256 ON 4/1 2 AP ON 100 15.6 TRF 19 18 3:40
total scanning time = 23:45 min.

ELBOW
Extremity Coil. Prone - arm overhead.
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other Max. # Slices Avail. # Slices Needed time
cor STIR 5000/35/150 8 14 224*224 - 4/1 2 RL OFF 100 14 - 17 15 4:45
cor PD NO fs 2000/40 6 12 256*256 ON 3/1 3 RL OFF 100 15.6 TRF 21 18 4:28
sag T2 fs 3600/70 8 10 256*256 - 4/1 2 AP OFF 100 15.6 - 23 18 3:58
ax T1 400/15 - 14 256*256 - 4/1 2 AP OFF 100 15.6 - 20 18 3:28
ax T2 fs 3000/55 6 14 256*256 - 4/1 2 AP OFF 100 15.6 - 23 18 4:30
total scanning time = 21:48 min.

WRIST
Wrist coil. Prone - arm overhead.
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other Max. # Slices Avail. # Slices Needed time
cor T1 400/15 - 10 256*256 - 3/1 2 RL OFF 100 15.6 - 15 14 3:31
cor T2 fs 3000/55 8 10 256*192 - 3/1 3 RL OFF 100 15.6 - 18 14 3:42
cor GRE (no fast) NO fs 35/20/FA=15 - 10 256*192 - 1.5/0 1.5 RL OFF 100 15.6 - 124 35 5:30
ax T2 fs 3500/55 8 10 256*256 - 4/1 3 RL OFF 100 15.6 - 18 15 4:54
sag T2 NO fs 4000/80 8 10 256*256 - 4/1 2 RL OFF 100 15.6 - 19 14 3:18
total scanning time = 20:57 min.

PELVIS
Torso Coil. SI saturation band 50 mm.
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other     time
cor T1 entire pelvis 800/15 - 36 512*192 - 8/2 2 RL ON 100 15.6 -     5:17
cor STIR entire pelvis 6050/40/150 8 36 256*192 ON 8/2 2 RL ON 100 15.6 -     5:21
ax T1 entire pelvis 650/15 - 36 512*256 - 8/2 2 AP ON 100 15.6 -     3:45
ax T2 fs entire pelvis 4000/55 6 36 256*256 ON 8/2 2 AP ON 100 15.6 -     5:52
cor in & out-of-phase entire pelvis 150/-/75 - 36 256*192 - 8/2 1 RL ON 100 62.5 -     0:30
total estimated scanning time = 20:45 min.

Hip
Torso Coil. SI saturation band 50 mm.
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other Max. # Slices Avail. # Slices Needed time
cor T1 entire pelvis 800/15 - 36 512*192 - 4/1 2 RL ON 100 15.6 - 22 22 5:17
cor STIR entire pelvis 6050/50/150 8 36 256*192 ON 4/1 2 RL ON 100 15.6 - 22 22 4:57
ax PD NO fs painful hip 3125/35 6 16 256*256 ON 4/1 2 AP ON 100 15.6 TRF 29 22 4:34
sag T2 fs painful hip 3500/55 6 18 256*192 ON 4/1 2 AP ON 100 15.6 - 25 23 5:14
total scanning time = 20:02 min.

Knee
Sat Bands S & I
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other Max. # Slices Avail. # Slices Needed time
sag PD fs 2500/20 5 16 256*256 ON 4/1 2 SI ON 100 15.6 TRF 23 19 4:25
cor T1 750/15 - 16 512*224 - 4/1 2 RL - 100 15.6 - 20 20 5:47
cor PD fs 2500/20 5 16 256*256 ON 4/.5 2 RL - 100 15.6 TRF 23 20 4:25
ax T2 fs 3000/60 6 16 256*192 ON 4/1 2 RL - 100 15.6 - 24 24 4:24
total scanning time = 21:40 min.

Ankle
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other Max. # Slices Avail. # Slices Needed time
sag T1 FSE 550/17 3 16 256*192 - 3/1 2 AP ON 100 15.6 TRF 18 (2 Acq.) 16 2:25
sag STIR (xl) 5000/36/150 8 16 224*192 - 3/1 2 AP ON 100 12.6 NPW VBw 18 16 4:45
ax PD NO fs 2875/30 6 14 256*256 ON 3/1 2 RL - 100 15.6 TRF 26 24 4:18
ax T2 fs 3575/55 8 14 256*192 - 3/1 3 RL - 100 15.6 - 24 24 4:24
cor T2 fs 3400/55 8 14 256*192 - 4/1 3 RL - 100 15.6 - 24 24 4:12
total scanning time = 22.21 min.

Foot (Mid- or Fore-foot)
NOTE: Optimize FoV to evaluate area of interest, i.e. forefoot vs. midfoot.

Supine - Chimney coil. Prone for toes.
SEQUENCE TR/TE/(FA or TI) ETL FoV matrix Inter-polation (zip 512) slice / gap NEX Ph DIR No Phase Wrap FoV Phase Bw Other Max. # Slices Avail. # Slices Needed time
cor T1 = short axis = "cucumber slices" 800/15 - 14 256*192 - 3/1 2 AP - 100 15.6 - 32 32 5:10
cor T2 fs = short axis = "cucumber slices" 5100/60 6 14 256*192 - 3/1 2 AP - 100 12.5 - 32 32 4:10
sag T1 550/15 - 16 256*256 - 3/1 2 SI ON 100 15.6 - 22 22 3:39
sag STIR 5150/40/150 8 16 224*224 - 3/1 2 SI ON 100 12 - 22 22 5:35
ax T2 NO fs 3000/75 8 16 256*192 - 3/1 2 AP - 100 15.6 - 23 18 3:18
total scanning time = 21:51 min.

Mass Protocol
If mass located anterior or posterior, use sag for the third sequence; if mass located medial or lateral, use cor for the third sequence (T2 fs).
ax T1
ax T2 NO fs
cor / sag T2 fs
ax T1 fs pre- & post-C
cor & sag T1 fs post-C
 

Metal Protocol (any joint)
NO GRE. NO fs. Decrease FoV at least 2 cm. Increase matrix (256 sq.). Increase Bw (250 Hz/pixel or 125 Hz/pixel for 256 and 512 matrices, respectively.
axial T1 and T2 NO fs
cor or sag STIR
axial post-C
 
SIEMENS v. GE Bw CONVERSION EQUATION Siemens [Hz / pixel] x Base Resolution / 2000 = GE Bandwidth [KHz]

e.g. 130 Hz/px x 250 / 2000 = 16 KHz