Adaptable frequency referencing for phantoms #732
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Range check/adjustment of frequency limits failed due to incorrect variable name
Adaptable referencing for phantoms which may not include the typical reference singlets, and may include a 0 ppm reference.
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Thanks @alexcraven |
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The current frequency referencing assumes the presence of Cr and Cho, or NAA singlets. This is fine for healthy brains and brain-like phantoms (eg, BRAINO solution), but problematic for non-brain-like phantoms.
This update adds a function,
osp_PhantomReferencing, which checks for the presence of these major singlets in the expected constellation before trying to reference to them. It also checks for a 0 ppm reference (DSS/TSP) and uses that if the major peaks are not present. If neither option is available, no further referencing is attempted (which is preferable to incorrectly referencing to an unknown other singlet)