config_example.yaml

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# ------ Simulation settings for (py)pulseq-cest BlochMcConnell simulations ------ #
# ------------------------ https://pulseq-cest.github.io/ ------------------------ #
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# Simulation parameters for gray matter at 3T with
# - 3 CEST pools
# - 1 NOE pool
# - a SuperLorentzian shaped MT pool
#
# sources/references for settings in this file:
# CEST pools: https://doi.org/10.1016/j.neuroimage.2017.04.045

###### Pool settings
#         f: relative pool size fraction (float)
#        r1: inverse longitudinal relaxation time R1 = 1/T1 [Hz] (float)
#        r2: inverse transversal relaxation time R2 = 1/T2 [Hz] (float)
#         k: exchange rate [Hz] to water pool (MT and CEST pools only) (float)
#        dw: chemical shift (delta omega) relative to water [ppm] (MT and CEST pools only) (float)
# lineshape: lineshape of the MT Pool ('Lorentzian', 'SuperLorentzian' or 'None') (str)

### water pool
water_pool: {
  f: 1.0,
  r1: 1 / 1.3,
  r2: 1 / 75e-3
}

### MT pool
mt_pool: {
  f: 0.1,
  r1: 1 / 1.3,
  r2: 1e5,
  k: 23,
  dw: 0,
  lineshape: 'SuperLorentzian'
}

### CEST pool(s)
cest_pool: {
  'Amide': {
    f: 72e-3 / 111,
    r1: 1 / 1.3,
    r2: 1 / 100e-3,
    k: 30,
    dw: 3.5
  },
  'Creatine': {
    f: 20e-3 / 111,
    r1: 1 / 1.3,
    r2: 1 / 100e-3,
    k: 1100,
    dw: 2
  }
}

###### Scanner settings
#       b0: field strength [T] (float)
#    gamma: gyromagnetic ratio [rad / uT], default is 267.5153 (float)
# b0_inhom: field inhomogeneity [ppm], default is 0.0 (float)
#   rel_b1: relative amp inhomogeneity, default is 1.0 (float)
b0: 3
gamma: 267.5153
b0_inhom: 0.0
rel_b1: 1

##### Additional simulation settings
#           verbose: verbose output, default is False (bool)
#    reset_init_mag: True to reset magnetization after each readout, default is True (bool)
#             scale: relative magnetization after reset of magnetization, default is 1 (float)
# max_pulse_samples: maximum number of samples for each shaped rf pulse, default is 500 (int)
verbose: False
reset_init_mag: True
scale: 0.5
max_pulse_samples: 300