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Table 1. Siemens Sequences

Acronym Full Term Technique GE Equivalent Philips Picker
Spin Echo Sequences
SE Singel Spin Echo Single Echo Spin Echo SESE THRIFT (Spin-echo throughput heightened rapid flip T2)
PRISE (Phase symmetrized rapid increased flip spin echo)
--- Spin Echo Double Echo Multi-Echo Spin Echo MEMP (Multiecho multiplanar)
VEMP (Variable echo multiplanar
MSEMultiecho THRIFT
TSE
HASTE
Turbo Spin Echo
Half Fourier Acquisition Turbo Spin Echo
Echo Train Spin Echo FSE (Fast Spin Echo)
SS-FSE (Single shot-FSE
TSE
UTSE (Ultrafast FSE)
FSE
TGSE Turbo Gradient Spin Echo Hybrid Gradient Echo-Spin Echo GRASE (Gradient-Spin Echo) GRASE GRASE
Inversion-Recovery Sequences
IR Inversion Recovery Standard Inversion Recovery MPIR (Multiplanar IR) IR IR
TurboIR Turbo Inversion Recovery Echo Train Inversion Recovery FMPIR (Fast Multiplanar IR) IR-TSE (IR - turbo spin echo) IR
--- Interleaved IR Interleaved Excitation N/A N/A Slice Interleaved IR
--- Absolute Value IR Magnitude Reconstruction (standard/default) Modulus IR (standard/default)
TrueIR --- Phase Sensitive Reconstruction N/A Real-IR N/A
Gradient Echo Sequences
FLASH Fast Low Angle Shot Spoiled GE SPGR (Spoiled GRASS)
FSPGR (Fast Spoiled GRASS)
MPSPGR (Multiplanar Spoiled GRASS)
FMPSPGR (Fast Multiplanar Spoiled GRASS)
T1 CE-FFE (T1 Contrast-Enhanced Fast Field Echo) RF-FAST (Radio-Frequency Spoiled Fourier-Acquired Steady State)
FISP Fast Imaging with Steady-state Precession Refocused, Post-excitation GE GRASS (Gradient Acquisition in the Steady State)
Fast GRASS
MPGR (Multiplanar GRASS)
FMPGR (Fast Multiplanar GRASS)
FFE (Fast Field Echo) FAST
PSIF Reversed FISP Refocused, Pre-excitation GE SSFP (Steady State Free Precession) T2 CE-FFE (T2 Contrast-Enhanced FFE) CE-FAST (Contrast-Enhanced FAST)
TurboFLUSH
MP-RAGE

Magnetization-Prepared Rapid Acquisition Gradient Echo
Magnetization-prepared GE IR-prepared fast GRASS
DE-GRASS (Driven Equilibrium Prepared Fast GRASS)
TFE (Turbo Field Echo) RAM-FAST (Rapid Acquisition Magnetization-Prepared FAST)

Table 2. Acronym Tables

Acronym
Spelled-out Name
Balanced FFE balanced fast field echo
CE-FAST contrast-enhanced Fourier-acquired steady state
CE-FFE T1 contrast-enhanced fast field echo (T1-weighted)
CE-FFE T2 CE-FFE (T2-weighted)
CSFSE continguous-slice fast-acquisition spin echo
DE FGR driven-equilibrium fast gradient-recalled acquisition in the steady state
DEFAISE dual-echo fast-acquisition interleaved spin echo
DESS double-echo stead- state (combination of FISP and PSIF)
DFSE double-fast spin echo
E-SHORT steady-state gradient echo with spin-echo sampling
FADE FASE acquisition double echo
FAME fast-acquisition multi-echo
FASE fast spin echo
FAST Fourier-acquired steady state
FATE fast turbo echo (=FADE)
FE field echo
FEDIF field echo with echo time set for water and fat signals in opposition
FEER field even-echo by reversal
FESUM field echo with echo time set for water and fat signals in phase
FFE fast field echo
FGR fast gradient-recalled acquisition in the steady state
FISP fast imaging with steady precession
FLARE fast low-angle recalled echo
FLASH fast low-angle shot
FRE field-reversal echo
FS fast scan
FSE fast spin echo
F-SHORT steady-state gradient echo based on free induction decay
FSPGR fast spoiled gradient-recalled
GE gradient echo
GFE gradient field echo
GFEC gradient field echo with contrast
GRASE gradient and spin echo
GRASS gradient-recalled acquisition in the steady state
GRE gradient echo (as 'generic' name); gradient-recalled echo
GREC gradient field echo with contrast
GRECO gradient-recalled echo
GRECHO gradient-recalled echo
IR FGR inversion recovery fast gradient-recalled acquisition in the steady state
MESS multi-echo single shot
MPGR multiplanar gradient-recalled
MP-RAGE magnetization-prepared rapid gradient echo
PFI partial flip imaging
PS partial saturation
PSIF reverse fast imaging with steady precession
QUEST quick echo-split imaging technique
RAM-FAST rapidly acquired magnetization-prepared Fourier-acquired steady state
RARE rapid acquisition with relaxation enhancement
RF-FAST RF-spoiled Fourier-acquired steady state
RF spoiled RF-spoiled Fourier-acquired
RISE rapid imaging spin echo
ROAST resonant offset averaging in the steady state
RS rapid scan
RSE rapid spin echo
SHORT short repetition technique
SMASH short minimum-angle shot
SPGR spoiled gradient-recalled
SSFP steady-state free precession
STAGE small tip angle gradient echo
STAGE:T1W small tip angle gradient echo: T1-weighted
STEP stimulated echo progreessive imaging
STERF steady-state technique with refocused free induction decay
TFE 'turbo'-field echo
3D MP RAGE 3D magnetization-prepared rapid gradient echo
T1 FAST Fourier-acquired steady state (T1-weighted)
T1 FFE contrast-enhanced fast field echo (T1-weighted)
T2 FFE contrast-enhanced fast field echo (T2-weighted)
TRUE FISP fast imaging with steady precession (heavily T2-weighted)
TSE 'turbo' spin echo
Turbo-FE 'turbo' field echo
TurboFLASH 'turbo'-fast low angle shot
Turbo SE 'turbo' spin echo
Turbo-SHORT 'turbo' short repetition technique

 

TABLE 3: Different terms for the gradient-echo pulse sequences. * In this context, "contrast-enhanced" refers to the radiofrequency pulse sequence; it does not mean enhancement with a contrast agent.

S-GRE (spoiled gradient-echo)
GFE gradient field-echo
CE*-FFE-T1 contrast-enhanced* fast field echo with T1-weighting
FLASH fast low angle single shot
PS partial saturation
RFS FAST RF spoiled Fourier-acquired steady-state technique
SHORT short repetition technique
SPGR spoiled gradient recalled (spoiled GRASS)
STAGE:T1W T1-weighted small tip angle gradient-echo
T1-FAST T1-weighted Fourier-acquired steady-state technique
T1-FFE T1-weighted fast field echo
 
R-GRE
(refocused gradient-echo)
FAST Fourier-acquired steady-state technique
FFE fast field echo
FISP fast imaging with steady-state precession
F-SHORT short repetition technique based on free induction decay
GFEC gradient field echo with contrast
GRASS gradient-recalled acquisition in the steady state
ROAST resonant offset averaging in the steady state
SSFP steady-state free precession
 
CE-GRE
(contrast-enhanced* gradient-echo)
CE-FFE (FAST) contrast-enhanced* fast field echo / FAST
PSIF reverse fast imaging with steady-state precession
SSFP steady-state free precession

Table 4. Echo-Planar Imaging (EPI) Terminology

Term Synonyms Characteristics
Single Shot --- All echoes for image are acquired following one excitation pulse
Multishot Segmented Echoes for image are acquired following more than one excitation pulse
Blipped Phase Encoding --- Small amplitude steps applied between readout gradient reversals
Constant Phase Encoding --- Phase-encoding gradient is on continuously
Spiral Phase Encoding --- Phase-encoding gradient has alternately positive and negative polarity
Note: Terminology is the same for all the manufacturers

Table 5. Hydrogen MR Spectroscopy Terminology

Term Synonyms Characteristics
Point Resolved Spectroscopy PRESS, SE Volume excitation using section-selective 90-180-180 pulse train
Stimulated Echo Acquisition Mode STEAM Volume excitation using section-selective 90-90-90 pulse train
Singel Voxel Spectroscopy SVS Small volume of tissue excited, single spectrum produced
2D chemical shift imaging
2D MR spectroscopic imaging
2D-CSI
2D-MRSI
Large volume of tissue excited, multiple spectra produced
Note: Terminology is the same for all the manufacturers
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