k-Wave User Forum » Topic: Steering a Linear array example

k-Wave User Forum » Topic: Steering a Linear array example http://www.k-wave.org/forum/topic/steering-a-linear-array-example Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:43:22 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://www.k-wave.org/forum/search.php Bradley Treeby on "Steering a Linear array example" http://www.k-wave.org/forum/topic/steering-a-linear-array-example#post-5156 Sun, 19 Jul 2015 12:40:38 +0000 Bradley Treeby 5156@http://www.k-wave.org/forum/ Hi Suryakant, Perhaps it's easiest to start with one of the examples that are included in the toolbox (e.g., <a href="http://www.k-wave.org/documentation/example_us_beam_patterns.php">Simulating Ultrasound Beam Patterns</a>). First make sure you can run this, and then make the modifications you need? You can access the examples through the MATLAB help browser (click on "Supplemental Software" if you are using a recent version of MATLAB). Brad. Suryakant on "Steering a Linear array example" http://www.k-wave.org/forum/topic/steering-a-linear-array-example#post-5150 Fri, 17 Jul 2015 11:13:00 +0000 Suryakant 5150@http://www.k-wave.org/forum/ Thank you for helping me. So, I tried to do what you said but I am now getting this error :- >> LinearArray User defined classes not supported, returning grid structure... bencox on "Steering a Linear array example" http://www.k-wave.org/forum/topic/steering-a-linear-array-example#post-5149 Thu, 16 Jul 2015 12:50:01 +0000 bencox 5149@http://www.k-wave.org/forum/ Hi Suryakant, You've defined <code>medium.sound_speed</code> as a matrix, but perhaps when defining <code>tone_burst_offset</code> you want to divide by a single value of sound speed ie. the value of the sound speed where the source is located? Ben Suryakant on "Steering a Linear array example" http://www.k-wave.org/forum/topic/steering-a-linear-array-example#post-5147 Thu, 16 Jul 2015 12:09:26 +0000 Suryakant 5147@http://www.k-wave.org/forum/ We have followed the example as it is described in the manual but we keep getting the following error - Error using / Matrix dimension must agree tone_burst_offset = 40 = element_spacing*element_index*sin(steering_angle*pi/180)/(medium.sound_speed*dt); This is how we have defined the following matrices steering_angle = 30; medium.sound_speed = 1500*ones(Nx,Ny); medium.sound_speed(1:Nx/2,:) =1800; dt = (.5*10^-6)^-1;