hmrR_OD2Conc - BUNPC/Homer3 GitHub Wiki

UI Name :
OD_to_Conc

Syntax :
dc = hmrR_OD2Conc( dod, probe, ppf)

Description :
Convert OD to concentrations

Inputs :

• dod: SNIRF.data container with the Change in OD time course.
• probe: SNIRF.probe container with the source/detector geometry.
• ppf: Partial path length factors for each wavelength. If there are 2 wavelengths of data, then this is a vector of 2 elements. Typical value is ~6 for each wavelength if the absorption change is uniform over the volume of tissue measured. To approximate the partial volume effect of a small localized absorption change within an adult human head, this value could be as small as 0.1. It is recommended to use default values of “1 1” which will result in concentration units of “molar ppf” such that the user can then divide by an estimated ppf at any future point to estimate what the molar concentration change would be.

Outputs :

• dc: SNIRF.data container with the concentration data

Usage Options :

• Delta_OD_to_Conc: dc = hmrR_OD2Conc( dod, probe, ppf)

Default Parameters :

• ppf: [1.0, 1.0]

Prerequisites :

• Intensity_to_Delta_OD: dod = hmrR_Intensity2OD( intensity )