http://www.k-wave.org/forum/topic/mismatch-in-the-pressure-between-focused-ultrasound-example-and-oneil Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 04:36:50 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/mismatch-in-the-pressure-between-focused-ultrasound-example-and-oneil#post-7972 Thu, 03 Dec 2020 10:00:59 +0000 Bradley Treeby 7972@http://www.k-wave.org/forum/ <p>Hi HS,</p> <p>The example you mention is in 2D, while the O'Neil solution is in 3D. An arc source in 2D (as used in the example) is actually an infinite cylindrically focused source in 3D (everything is extended in the out of plane direction), and thus the solutions will be different.</p> <p>There's an example of comparing k-Wave with the O'Neil solution in the examples with the new <a href="http://www.k-wave.org/forum/topic/alpha-version-of-kwavearray-off-grid-sources"><code>kWaveArray</code></a> class that you could take a look at for reference.</p> <p>Brad </p> http://www.k-wave.org/forum/topic/mismatch-in-the-pressure-between-focused-ultrasound-example-and-oneil#post-7971 Thu, 03 Dec 2020 08:12:41 +0000 HS 7971@http://www.k-wave.org/forum/ <p>Hello,</p> <p>I tried to simulate a HIFU pressure field and wanted to get an axial acoustic pressure.</p> <p>For the comparison, I simulated the focused_ultrasound_heating example and the focusedBowlOneil example.</p> <p>After the simulation, I extracted the p_max_all along the acoustic axis and compared it with results extracted from other methods (O'neil).</p> <p>However, there was a large mismatch in the pre-focal region while the acoustic pressures near the focus were well-matched.</p> <p>The result from the focused_ultrasound_heating example showed much higher than the focusedBowlOneil result.</p> <p>Is there any limitation in the focused_ultrasound_heating example?</p> <p>Or how can I fix the problem and get the same result from the focused_ultrasound_heating example?? </p>