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Re: [SCIRUN-USERS] Regarding activation based inverse problem


Chronological Thread 
  • From: Jess <jess@sci.utah.edu>
  • To: Vikas R bhat <vikasraghubhat@gmail.com>
  • Cc: scirun-users@sci.utah.edu
  • Subject: Re: [SCIRUN-USERS] Regarding activation based inverse problem
  • Date: Sun, 21 Jul 2019 23:31:58 -0600
Hi Vikas,

The actgauss-newton inverse is designed to compute the activation times from the bsp recordings.  Generally, there is only one activation time per point on the heart surface.  If you have multiple beats, you will need to separate them.  If you are trying to reconstruct the potentials on the heart surface, you can try tikhnov inverse, or one of the others.  

cheers,
Jess



On Jul 8, 2019, at 10:55 PM, Vikas R bhat <vikasraghubhat@gmail.com> wrote:

Respected sir, 

We are trying to solve the activation based inverse problem of ECG using actgauss-newton-inverse. srn network. 

A: forward matrix 81 x 257
Y: bsp: observation 81 x 100
tauinit :  257 x 100

The problem is the 'tau' variable in the function actgaussnewton.m is not getting updated. Reason is the matrix 'step' has 257 x 1 dimensions not 25700 x 1. 
I have double checked the code. 
Under the comment "%Update tau with the result of the step", it shows error (matrix dimensions must agree). I dont know where I am doing mistakes.
 

Please help me out. Waiting for your reply.


--
Thanks,

Vikas.R.Bhat
Contact: +91 9481263176

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