k-Wave

1. mariam
   

   Member
   Joined: Aug '18
   Posts: 4

   I have a problem with focusing the transmitter. I wanted to use the focus function however it doesn't seem to "focus" on the scatterer i put.
   I am a bit confused about the focus_distance; shall I use (kgrid.x(gridpoint)) or
   gridpoint*(kgrid.dx)?
   Thank you.

   Posted 6 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Mariam,

   Do you mean the focus_position input of the focus function? If so, then it should be in the Cartesian coordinate system used by kWaveGrid. For example, if you want to focus at the grid point [30, 20, 10], then set this to:

   focus_position = [kgrid.x_vec(30), kgrid.y_vec(20), kgrid.z_vec(10)];

   Brad.

   Posted 6 years ago #

3. mariam
   

   Member
   Joined: Aug '18
   Posts: 4

   Thank you so much Brad! :)

   Posted 6 years ago #

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