k-Wave User Forum » Topic: Define the initial pressure as 3DDisk

k-Wave User Forum » Topic: Define the initial pressure as 3DDisk http://www.k-wave.org/forum/topic/define-the-initial-pressure-as-3ddisk Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 01:00:24 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://www.k-wave.org/forum/search.php Bradley Treeby on "Define the initial pressure as 3DDisk" http://www.k-wave.org/forum/topic/define-the-initial-pressure-as-3ddisk#post-7831 Wed, 16 Sep 2020 10:55:56 +0000 Bradley Treeby 7831@http://www.k-wave.org/forum/ If you're modelling an initial value problem (i.e., photoacoustics), you can assign the matrix to <code>source.p0</code>. HustYjq on "Define the initial pressure as 3DDisk" http://www.k-wave.org/forum/topic/define-the-initial-pressure-as-3ddisk#post-7830 Wed, 16 Sep 2020 03:21:07 +0000 HustYjq 7830@http://www.k-wave.org/forum/ Hi Bradley Treeby， Thanks for your help.I still have a question.If i have a matrix of initial pressure ,how do i assign it to source.p?In the examples,the pressure in each position is the same.I have not found the intput matrix of initial pressure. Thanks Bradley Treeby on "Define the initial pressure as 3DDisk" http://www.k-wave.org/forum/topic/define-the-initial-pressure-as-3ddisk#post-7809 Fri, 11 Sep 2020 10:24:10 +0000 Bradley Treeby 7809@http://www.k-wave.org/forum/ Hi HustYjq, The initial pressure distribution is just a matrix, so you can define it to be any shape. One way to make a disc in 3D is to assign a 2D disc to one slice. For example: <pre><code>disc2D = makeDisc(50, 50, 25, 25, 20); disc3D = zeros(50, 50, 50); disc3D(:, :, 25) = disc2D; voxelPlot(disc3D);</code></pre> Hope that helps, Brad HustYjq on "Define the initial pressure as 3DDisk" http://www.k-wave.org/forum/topic/define-the-initial-pressure-as-3ddisk#post-7789 Sat, 05 Sep 2020 02:55:37 +0000 HustYjq 7789@http://www.k-wave.org/forum/ Hi, I want to simulate Photoacoustic Waveforms in 3D.In the examples,the initial pressure distribution is defined as a ball (filled sphere) using makeBall.However,I have a 3DDisk initial pressure.I don’t know whether its shape can be changed.So can anyone tell me how to define it? Any help will be appreciated. Thanks!