http://www.k-wave.org/forum/topic/presure-profile Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 11:21:21 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/presure-profile#post-7231 Wed, 12 Feb 2020 16:17:05 +0000 Bradley Treeby 7231@http://www.k-wave.org/forum/ <p>Hi Kai,</p> <p>You can do this by creating <code>source.p</code> to have the same number of time series as elements in your source mask. For example, you can pass a vector or matrix of amplitudes to <code>createCWSignals</code> and then reshape this to assign to source.p.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/presure-profile#post-7202 Mon, 03 Feb 2020 15:11:23 +0000 kai.rieger 7202@http://www.k-wave.org/forum/ <p>Hello Brad,<br /> the transducer is a matrix of 1s and 0s created with the command makeLine. That means there is a hard transition at the edge of the source (1 -&gt; 0) and the produces side lobes. The real source has a smooth transition at the edges and therefore no side lobes. For me, it would be nice to chose values between 0 and 1 to build a realistic source.</p> <p>Best Regards,<br /> Kai </p> http://www.k-wave.org/forum/topic/presure-profile#post-7182 Mon, 20 Jan 2020 17:45:06 +0000 Bradley Treeby 7182@http://www.k-wave.org/forum/ <p>Hi Kai,</p> <p>The input to source.p_mask must be binary, i.e., a matrix of 1s and 0s. What is the value of <code>transducer</code> in your script?</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/presure-profile#post-7119 Wed, 06 Nov 2019 14:21:58 +0000 kai.rieger 7119@http://www.k-wave.org/forum/ <p>Hello,</p> <p>a small addition to my contribution, when I use source.p0, I can use the presure profile but than it is just a puls and not a toneBurst.</p> <p>Best Regards,<br /> Kai </p> http://www.k-wave.org/forum/topic/presure-profile#post-7117 Wed, 06 Nov 2019 12:48:41 +0000 kai.rieger 7117@http://www.k-wave.org/forum/ <p>Hello,</p> <p>I try to simulate a pressure source where all source points should have a certain amplitude. I calculated the pressure profile of my ultrasonic transducer and stored it in a 2D array with values between 0 and 1.<br /> Unfortunately I received the following error message:<br /> "If using a labelled source.p_mask, the source labels must be monotonically increasing and start from 1."</p> <p>If I understand the error message correctly, then it doesn't work the way I try. Is there any other way to do this?</p> <p>I use the following commands:</p> <p>%transducer is a 2D array with values between 0-1.<br /> source.p_mask = transducer;<br /> source.p = toneBurst(source_envelope, tone_burst_freq, tone_burst_cycles, 'Plot', true);</p> <p>Thank you very much for your help!</p> <p>Best Regards,<br /> Kai </p>