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Re: time domain curve fitter

Posted by Daniel Glen on Nov 14, 2006; 7:50pm
URL: http://imagej.273.s1.nabble.com/time-domain-curve-fitter-tp3701002p3701005.html

Outside of the ImageJ domain, software for FMRI/MRI analysis like  
AFNI or SPM can probably do what you want. I am in the group that  
develops AFNI. The particular program to do what you want is called  
3dDeconvolve  in the AFNI sofware. A gamma variate is one of the  
standard choices for fitting FMRI data over time with stimulus  
events. Other options include tent functions, stick functions and non-
linear solutions via 3dNLfim.  To do this over the z-direction  
instead should require a small trick to transform the z into time for  
this analysis. You can check http://afni.nimh.nih.gov/afni/doc/edu/ 
afni_3dDeconvolve for more information.

On Nov 14, 2006, at 10:14 AM, Simon Roussel wrote:

> Hi,
> ImageJ has got a curve fitter.
> I am looking for a "time-domain" or "z axis" image fitter.
> I would like to have for each pixel of a stack, a fit (actually
> gamma-variate)  along the z axis. It could return a stack with the  
> same z
> values, but where the pixels values would be predicted from the  
> fit, or
> alternatively another stack with the coefficients of the fit.
> I would use that to analyse MRI data following first-pass in the  
> brain of a
> contrast agent to derive cerebral blood volume and mean transit time.
> Does anyone know a plugin, macro which already does that or could  
> be adapted ?
> Thanks in advance,
> Cheers,
> Simon