http://www.k-wave.org/forum/topic/error-in-p_max-and-p_min-using-kspacefirstorderas Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:08:04 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/error-in-p_max-and-p_min-using-kspacefirstorderas#post-8575 Wed, 13 Jul 2022 18:16:09 +0000 bencox 8575@http://www.k-wave.org/forum/ <p>Hi FUSFmatt, </p> <p>That does look a bit odd. Is the <code>sensor.mask</code> covering the whole region? Have you reshaped the outputs for 'p_min' and 'p_max' correctly? Could it be picking up a larger amplitude in the initial transient? </p> <p>Best wishes<br /> Ben </p> http://www.k-wave.org/forum/topic/error-in-p_max-and-p_min-using-kspacefirstorderas#post-8558 Wed, 29 Jun 2022 19:32:59 +0000 FUSFmatt 8558@http://www.k-wave.org/forum/ <p>I’m exploring your axisymmetric code to model a simple spherically-focused disc transducer we’re building, but the p_min and p_max outputs don’t seem to align with what I see in p_final. </p> <p>Here's a link to a Matlab figure showing p_final alongside p_max and p_min. Apparently p_max and p_min pressures are shifted left, and therefore do not display the focal spot pressures. Near the transducer at the top of the image, you can see where the pressures should lie on top of the transducer, but also appear shifted left:<br /> <a href="https://fusf.sharepoint.com/:i:/s/FUSF-Development/Ebn2GZi9SX5Khd7gh80_L4YBRqmwubNlQBw1ZVhP7aEi_Q?e=cgvlb1" rel="nofollow">https://fusf.sharepoint.com/:i:/s/FUSF-Development/Ebn2GZi9SX5Khd7gh80_L4YBRqmwubNlQBw1ZVhP7aEi_Q?e=cgvlb1</a></p> <p>Simply altering the kspaceFirstOrderAS to kspaceFirstOrder2D yields pressure results that align as expected. Happy to provide code or 2D screen-captures if those are helpful. </p>