SCIRun User Mailing List

Text archives Help

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

Chronological Thread 
  • From: Jess <>
  • To: Vikas R bhat <>
  • Cc:
  • 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.  


On Jul 8, 2019, at 10:55 PM, Vikas R bhat <> 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.


Contact: +91 9481263176

SCIRun users mailing list:
To unsubscribe, email with the "unsubscribe scirun-users" in the message body.

Archive powered by MHonArc 2.6.18.

Top of page