http://www.k-wave.org/forum/topic/focused-transmitter Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 15:43:38 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/focused-transmitter#post-6690 Wed, 12 Dec 2018 12:54:30 +0000 mariam 6690@http://www.k-wave.org/forum/ <p>Thank you so much Brad! :) </p> http://www.k-wave.org/forum/topic/focused-transmitter#post-6681 Sun, 09 Dec 2018 21:29:38 +0000 Bradley Treeby 6681@http://www.k-wave.org/forum/ <p>Hi Mariam,</p> <p>Do you mean the <code>focus_position</code> input of the <code>focus</code> function? If so, then it should be in the Cartesian coordinate system used by <code>kWaveGrid</code>. For example, if you want to focus at the grid point <code>[30, 20, 10]</code>, then set this to:</p> <p><code>focus_position = [kgrid.x_vec(30), kgrid.y_vec(20), kgrid.z_vec(10)];</code></p> <p>Brad. </p> http://www.k-wave.org/forum/topic/focused-transmitter#post-6667 Fri, 30 Nov 2018 16:01:36 +0000 mariam 6667@http://www.k-wave.org/forum/ <p>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.<br /> I am a bit confused about the focus_distance; shall I use (kgrid.x(gridpoint)) or<br /> gridpoint*(kgrid.dx)?<br /> Thank you. </p>