http://www.k-wave.org/forum/topic/diffraction Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:39:03 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/diffraction#post-7390 Mon, 13 Apr 2020 11:14:56 +0000 Anastasiia 7390@http://www.k-wave.org/forum/ <p>Thanks! </p> http://www.k-wave.org/forum/topic/diffraction#post-7343 Wed, 01 Apr 2020 15:07:38 +0000 Bradley Treeby 7343@http://www.k-wave.org/forum/ <p>Hi Anastasiia,</p> <p>In the standard formulation of the Rayleigh integral for example, the boundary condition is a uniform velocity source in an infinite baffle. This is equivalent to using a pressure source in free space as used in k-Wave (see <a href="http://bug.medphys.ucl.ac.uk/papers/2014-Verweij-CBP.pdf">this paper</a>, section 2.19.2.6.2 for example). Thus you don't need to do anything more.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/diffraction#post-7328 Thu, 26 Mar 2020 16:54:38 +0000 Anastasiia 7328@http://www.k-wave.org/forum/ <p>Dear Bradley Treeby,<br /> The known diffraction correction integrals for US sources and receivers have been derived assuming the boundary condition of the source being flush with a wall, therefore the velocity of whatever is surrounding the source is =0.<br /> I was wondering, in k-wave simulations, if we need to model this situation should we make let's say a source mask where the central elements have a nonzero velocity (mimicking the transducer) while the outer border ones have a velocity equal zero (mimicking the wall) or is this boundary condition automatically provided?<br /> Thanks in advance! </p>