scale_amp_molar: Apply water reference scaling to a fitting results object to...
In spant: MR Spectroscopy Analysis Tools
scale_amp_molar R Documentation
Apply water reference scaling to a fitting results object to yield metabolite
quantities in millimolar (mM) units (mol / Litre of tissue).
Description
See the LCModel manual (section 10.2) on water-scaling for details on the
assumptions and relevant references. Use this type of concentration scaling
to compare fit results with LCModel and TARQUIN defaults. Otherwise
scale_amp_molal_pvc is generally the preferred method.
Usage
scale_amp_molar(fit_result, ref_data, w_att = 0.7, w_conc = 35880, ...)
Arguments
fit_result
a result object generated from fitting.
ref_data
water reference MRS data object.
w_att
water attenuation factor (default = 0.7). Assumes water T2 of
80ms and a TE = 30 ms. exp(-30ms / 80ms) ~ 0.7.
w_conc
assumed water concentration (default = 35880). Default value
corresponds to typical white matter. Set to 43300 for gray matter, and 55556
for phantom measurements.
...
additional arguments to get_td_amp function.
Value
a fit_result object with a rescaled results table.
spant documentation built on Sept. 11, 2024, 9:13 p.m.
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| scale_amp_molar | R Documentation |
Apply water reference scaling to a fitting results object to yield metabolite quantities in millimolar (mM) units (mol / Litre of tissue).
Description
See the LCModel manual (section 10.2) on water-scaling for details on the assumptions and relevant references. Use this type of concentration scaling to compare fit results with LCModel and TARQUIN defaults. Otherwise scale_amp_molal_pvc is generally the preferred method.
Usage
scale_amp_molar(fit_result, ref_data, w_att = 0.7, w_conc = 35880, ...)
Arguments
fit_result |
a result object generated from fitting. |
ref_data |
water reference MRS data object. |
w_att |
water attenuation factor (default = 0.7). Assumes water T2 of 80ms and a TE = 30 ms. exp(-30ms / 80ms) ~ 0.7. |
w_conc |
assumed water concentration (default = 35880). Default value corresponds to typical white matter. Set to 43300 for gray matter, and 55556 for phantom measurements. |
... |
additional arguments to get_td_amp function. |
Value
a fit_result object with a rescaled results table.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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