tfmri.coils.combine_coils

combine_coils(images, maps=None, coil_axis=- 1, keepdims=False)[source]

Sum of squares or adaptive coil combination.

Parameters

  • images – A Tensor. The input images.

  • maps – A Tensor. The coil sensitivity maps. This argument is optional. If maps is provided, it must have the same shape and type as images. In this case an adaptive coil combination is performed using the specified maps. If maps is None, a simple estimate of maps is used (ie, images are combined using the sum of squares method).

  • coil_axis – An int. The coil axis. Defaults to -1.

  • keepdims – A boolean. If True, retains the coil dimension with size 1.

Returns

A Tensor. The combined images.

References

1

Roemer, P.B., Edelstein, W.A., Hayes, C.E., Souza, S.P. and Mueller, O.M. (1990), The NMR phased array. Magn Reson Med, 16: 192-225. https://doi.org/10.1002/mrm.1910160203

2

Bydder, M., Larkman, D. and Hajnal, J. (2002), Combination of signals from array coils using image-based estimation of coil sensitivity profiles. Magn. Reson. Med., 47: 539-548. https://doi.org/10.1002/mrm.10092