Combine coil data based on the first data point of a reference signal.

By default, elements are phased and scaled prior to summation. Where a reference signal is not given, the mean dynamic signal will be used instead.

Usage

comb_coils(
  metab,
  ref = NULL,
  noise = NULL,
  scale = TRUE,
  scale_method = "sig_noise_sq",
  sum_coils = TRUE,
  noise_region = c(-0.5, -2.5),
  average_ref_dyns = TRUE,
  ref_pt_index = 1,
  ret_metab_only = FALSE
)

Arguments

metab

MRS data containing metabolite data.

ref

MRS data containing reference data (optional).

noise

MRS data from a noise scan (optional).

scale

option to rescale coil elements based on the first data point (logical).

scale_method

one of "sig_noise_sq", "sig_noise" or "sig".

sum_coils

sum the coil elements as a final step (logical).

noise_region

the spectral region (in ppm) to estimate the noise.

average_ref_dyns

take the mean of the reference scans in the dynamic dimension before use.

ref_pt_index

time-domain point to use for estimating phase and scaling values.

ret_metab_only

return the metabolite data only, even if reference data has been specified.

Value

MRS data.