General Parameters

usage: x_epi [-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]

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