General Parameters#
usage: x_epi_cmd [-out OUT] [-fov RO PE SLC] [-rbw BW] [-n_avg N] [-n_rep N]
[-tr TR] [-tv TV] [-ts TS] [-ro_off OFFSET] [-pe_off OFFSET]
[-slc_off OFFSET] [-n_echo N] [-delta_te DELTA]
[-ori {Sagittal,Coronal,Transverse}] [-pe_dir {AP,RL,SI}]
[-symm_ro] [-acq_3d] [-no_pe] [-no_slc] [-grad_spoil]
[-ramp_samp] [-ro_os FACTOR] [-slice_axis {X,Y,Z}]
[-alt_read] [-alt_pha] [-alt_slc]
[-run_spec {START,END,BOTH,NO}] [-spec_size N] [-spec_bw BW]
[-spec_flip ANGLE] [-spec_tr TR] [-n_spec N] [-b0 B0]
[-nuc {13C,1H,2H,15N,17O,31P,19F,23Na,129Xe}]
[-max_grad GRAD] [-max_slew SLEW]
[-rf_ringdown_time RF_RINGDOWN_TIME]
[-rf_dead_time RF_DEAD_TIME] [-adc_dead_time ADC_DEAD_TIME]
[-adc_raster_time ADC_RASTER_TIME]
[-block_duration_raster BLOCK_DURATION_RASTER]
[-grad_raster_time GRAD_RASTER_TIME]
[-rf_raster_time RF_RASTER_TIME]
Named Arguments#
- -out
Root for file outputs
Default: “epi”
Image parameters#
- -fov
Field of view in readout, phase, and slice dimensions [mm]
Default: [240, 240, 240]
- -rbw
Readout bandwidth [kHz]
Default: 50
- -n_avg
Number of averages
Default: 1
- -n_rep
Number of repetitions
Default: 1
- -tr
Minimum repetition time [ms]
Default: 0
- -tv
Minimum volume time [ms]
Default: 0
- -ts
Minimum set time [ms]
Default: 0
- -ro_off
Offset in readout dimension [mm]
Default: 0
- -pe_off
Offset in phase encoding dimension [mm]
Default: 0
- -slc_off
Offset in slice/second phase encoding dimension [mm]
Default: 0
- -n_echo
Number of echos
Default: 1
- -delta_te
Minimum time between echoes [ms]
Default: 0
- -ori
Possible choices: Sagittal, Coronal, Transverse
Acquistion orientation. Only used for reconstruction
Default: “Transverse”
- -pe_dir
Possible choices: AP, RL, SI
Phase encoding direction. Only used for reconstruction
Default: “AP”
Acquisition options#
- -symm_ro
Replace flyback readout with a symmetric one.
Default: False
- -acq_3d
Use a 3D readout instead of 2D
Default: False
- -no_pe
Turn phase encoding on/off
Default: False
- -no_slc
Turn off slice gradients
Default: False
- -grad_spoil
Turn gradient spoiling on
Default: False
- -ramp_samp
Turn on ramp sampling
Default: False
- -ro_os
Readout oversampling factor for ramp sampling
Default: 1.0
- -slice_axis
Possible choices: X, Y, Z
Axis to play slice selection gradients
Default: “Z”
- -alt_read
Alternate polarity of readout gradient every repeition
Default: False
- -alt_pha
Alternate polarity of phase encoding gradient every repeition
Default: False
- -alt_slc
Alternate polarity of second phase encoding every repetition
Default: False
Spectra options#
- -run_spec
Possible choices: START, END, BOTH, NO
Run a slice selective spectra at the start and/or end of the seqience.
Default: “NO”
- -spec_size
Number of points in spectra
Default: 2048
- -spec_bw
Spectral bandwidth [kHz]
Default: 25
- -spec_flip
Flip angle for slcie selective pulse [deg]
Default: 2.5
- -spec_tr
Minimum repetition time for spectra acquistions [ms]
Default: 1000
- -n_spec
Number of spectra acquisitions
Default: 1
Scanner Options#
- -b0
B0 Field Strength [Tesla]
Default: 3
- -nuc
Possible choices: 13C, 1H, 2H, 15N, 17O, 31P, 19F, 23Na, 129Xe
Nucleus to imaage
Default: “13C”
- -max_grad
Maximum gradient strength [mT/m]
Default: 100
- -max_slew
Maximum slew rate [T/m/s]
Default: 200
- -rf_ringdown_time
RF ringdown time [us]
Default: 30
- -rf_dead_time
RF dead time [us]
Default: 100
- -adc_dead_time
ADC dead time [us]
Default: 20
- -adc_raster_time
ADC raster time [ns]
Default: 100
- -block_duration_raster
Block raster time [us]
Default: 10
- -grad_raster_time
Gradient raster time [us]
Default: 10
- -rf_raster_time
RF raster time [us]
Default: 1