delay

delay ¶

Arterial delay utilities for DCE-MRI.

Provides time-shifting of arterial input functions to model bolus arrival delays.

shift_aif(aif, time, delay, xp=None)

Shift AIF by a time delay using linear interpolation.

Implements aif_shifted[i] = aif(t[i] - delay), with zero for t - delay < 0. GPU/CPU agnostic via xp array module.

PARAMETER	DESCRIPTION
`aif`	Arterial input function values, shape (n_time,). TYPE: `NDArray[floating]`
`time`	Time points in seconds, shape (n_time,). TYPE: `NDArray[floating]`
`delay`	Delay in seconds. Scalar returns shape `(n_time,)`. Array of shape `(n_voxels,)` returns `(n_time, n_voxels)`. TYPE: `float or NDArray[floating]`
`xp`	Array module. Auto-detected if None. TYPE: `module` DEFAULT: `None`

RETURNS	DESCRIPTION
`NDArray[floating]`	Shifted AIF values.