Output Images

The processing produces several output images. The name of the output images is taken from the first, or only, input image, with suffixes appended. These are:

  • _Water - a map of the separated water component.
  • _Fat - a map of the separated fat component.
  • _FatFrac - a map of the fat fraction, with values between 0 and 1. Zero indicates no fat is present in a pixel, and 1.0 indicates only fat (no water).
  • _T2Star - a map of T2*, with values in milliseconds.
  • _DeltaF - a map of the frequency offsets (in Hz) caused by the magnetic field inhomogeneity.

Some examples of the output images for a cross-section of the abdomen are shown below.

Output images for fat/water separation.
Water-only Fat-only
Fat Fraction Frequency Offset

For this example, the data quality did not allow estimation of T2*, which was fixed at 100 ms. The other processing settings were:

  • ΔB search range: 3 PPM.
  • B0 smoothness: Medium.
  • Default fat spectrum.
  • Max. nodes in B0 inhomogeneity search: 10 million.
  • Process in 3-D.
  • Zero the image background selected.