[Homer-users] Parameter for partial pathlength factor (OD_2_Conc) on HomER?

[David Boas]

In homer you give the two values. You give wavelength 1 first and wavelength 2 second. Generally wavelength 1 would be 690 and wavelength 2 would be 830 nm, but that depends on the order of the wavelengths in your SD.Lambda variable in your .nirs file.

 

David

 

 

 

From: <homer-users-bounces at nmr.mgh.harvard.edu> on behalf of Ketrin Lengu <klengu at emich.edu>
Reply-To: <homer-users at nmr.mgh.harvard.edu>
Date: Tuesday, March 14, 2017 at 8:40 AM
To: <homer-users at nmr.mgh.harvard.edu>
Subject: [Homer-users] Parameter for partial pathlength factor (OD_2_Conc) on HomER?

 

Hi all,

 

In calculating the ppf for an infant study (9mo olds), we have followed the Duncan 1995 guidelines, which suggested a DPF of 5.42 for 690nm and 4.71 for 832nms.  

 

When generating values in HomER, are you to list both 5.42 and 4.71 or is an average generated for both values (in this case 5.1).  

 

Any input along with a reference would very much be appreciated.

 

Thank you,

Keti Lengu

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