models

models

Signal models for T1 mapping.

Provides SPGRSignalModel (VFA) and LookLockerSignalModel as BaseSignalModel subclasses, enabling registry-driven dispatch and integration with the shared fitting infrastructure.

References

.. [1] Deoni SCL et al. MRM 2003;49(3):515-526. .. [2] Look DC, Locker DR. Rev Sci Instrum 1970;41:250-251.

SPGRSignalModel

Bases: BaseSignalModel

SPGR signal model for VFA T1 mapping.

S(alpha) = M0 * sin(alpha) * (1 - E1) / (1 - E1 * cos(alpha))

where E1 = exp(-TR / T1).

References

.. [1] Deoni SCL et al. MRM 2003;49(3):515-526.

name property

name

Return model name.

reference property

reference

Return primary literature citation.

parameters property

parameters

Return list of parameter names.

parameter_units property

parameter_units

Return mapping of parameter names to units.

get_bounds

get_bounds()

Return parameter bounds.

LookLockerSignalModel

Bases: BaseSignalModel

Look-Locker inversion recovery signal model.

S(TI) = A - B * exp(-TI / T1*)

Model parameters: T1_star (apparent T1 in ms), A (steady-state signal), B (signal amplitude).

References

.. [1] Look DC, Locker DR. Rev Sci Instrum 1970;41:250-251. .. [2] Deichmann R, Haase A. J Magn Reson 1992;96:608-612.

name property

name

Return model name.

reference property

reference

Return primary literature citation.

parameters property

parameters

Return list of parameter names.

parameter_units property

parameter_units

Return mapping of parameter names to units.

get_bounds

get_bounds()

Return parameter bounds.