[Nirfast] Normalisation of the measurements?

[Stanislaw Wojtkiewicz]

Hi Emmanuel

 

Calibrate your data on phantom to express it in photon fluence rate (photons
* mm^-2 * s^2) or use differential data.

 

Please refer to vast literature on tomographic reconstruction and
perturbation theory. Bioluminescence or NIRS, it does not matter, as the
mechanism is all the same. A good start would be:

#1

Durduran 2010, Diffuse optics for tissue monitoring and tomography

#2

Dehghani 2008, Near infrared optical tomography using NIRFAST: Algorithm for
numerical model and image reconstruction

 

Regards

Stanislaw Wojtkiewicz, PhD

 

---

School of Computer Science

University of Birmingham

B15 2TT

 

From: emmanuel.cosnard at outlook.fr <emmanuel.cosnard at outlook.fr> 
Sent: 20 March 2019 10:11
To: nirfast at public.kitware.com; s.wojtkiewicz at cs.bham.ac.uk
Subject: RE: [Nirfast] Normalisation of the measurements?

 

Hello Stanislas,

 

Thank you for taking the time to answer and sorry for my mistake, I am using
CSCGNW bioluminescence, and the field I am referring to in NIRFAST is
actually data_fn in the reconstruct_fl function. 

function [fwd_mesh,pj_error] = reconstruct_fl(fwd_mesh,...

    recon_basis,...

    frequency,...

    data_fn,...

    iteration,...

    lambda,...

    output_fn,...

    filter_n)

 

data_fn are the boundery data measured, and I wanted to know if we have to
normalise these data in a specific way.

 

Thank you and regards,

 

Emmanuel

 

  _____  

De : Stanislaw Wojtkiewicz <s.wojtkiewicz at cs.bham.ac.uk>
Envoyé : mercredi 20 mars 2019 10:01
À : emmanuel.cosnard at outlook.fr; nirfast at public.kitware.com
Objet : RE: [Nirfast] Normalisation of the measurements? 

 

Hi Emmanuel

 

It looks like the ‘CSCGNW’ function does not exist in NIRFAST.

Even Google knows nothing about it:)

Please, track down to whom this function belongs to.

 

Also, regardless of the existence of the function, I have a strong
impression that the current question might be outside of the scope of this
mailing list
.

 

Regards

Stanislaw Wojtkiewicz, PhD

 

---

School of Computer Science

University of Birmingham

B15 2TT

 

From: emmanuel.cosnard at outlook.fr <emmanuel.cosnard at outlook.fr> 
Sent: 20 March 2019 09:36
To: nirfast at public.kitware.com
Subject: [Nirfast] Normalisation of the measurements?

 

Hello,

 

I would like to know if we have to normalise our fluorescence measurements
data in a specific way for the "measurements" vector transmitted in the
CSCGNW function (function [xFinal varargout] = CSCGNW(jacobianMatrix,
measurements, recParam)). 

How do we take into account the time of exposure? Do the measures have to be
between a specific range, or do we have to apply a specific function on it?

 

Thank you and regards,

 

Emmanuel

 

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