l2_reg: Perform l2 regularisation artefact suppression.

In spant: MR Spectroscopy Analysis Tools

Perform l2 regularisation artefact suppression.

Description

Perform l2 regularisation artefact suppression using the method proposed by Bilgic et al. JMRI 40(1):181-91 2014.

Usage

l2_reg(
  mrs_data,
  thresh = 0.05,
  b = 1e-11,
  A = NA,
  xlim = NA,
  thresh_xlim = NULL,
  A_append = NULL,
  ret_norms = FALSE
)

Arguments

mrs_data	input data for artefact suppression.
thresh	threshold parameter to extract lipid signals from mrs_data based on the spectral integration of the thresh_xlim region in magnitude mode.
b	regularisation parameter.
A	set of spectra containing the artefact basis signals. The thresh parameter is ignored when A is specified.
xlim	spectral limits in ppm to restrict the reconstruction range. Defaults to the full spectral width.
thresh_xlim	spectral limits in ppm to integrate for the threshold map.
A_append	additional spectra to append to the A basis.
ret_norms	return the residual norm and solution norms.

Value

l2 reconstructed mrs_data object.

spant documentation built on Oct. 23, 2023, 5:06 p.m.