http://www.k-wave.org/forum/topic/photoacoustic-simulation-for-collection-of-linear-sources Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:33:25 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/photoacoustic-simulation-for-collection-of-linear-sources#post-8718 Wed, 08 Mar 2023 14:11:55 +0000 bencox 8718@http://www.k-wave.org/forum/ <p>Hi abash.kumar,</p> <p>1. You can input the acoustic properties of the medium as matrices the size of the grid. You can construct that whatever way you want to. There aren't specific tools to construct a layered medium but it is straightforward using normal matlab functions.<br /> 2. Similarly, you can define a photoacoustic source (<code>source.p0</code>) as a matrix the size of the grid, so, yes, you can model a distributed source such as a line or a collection of lines. The function <code>makeLine</code> may be useful.<br /> 3. Yes, define a binary sensor mask with 1s at the positions you want the detectors.</p> <p>Best wishes<br /> Ben </p> http://www.k-wave.org/forum/topic/photoacoustic-simulation-for-collection-of-linear-sources#post-8698 Sun, 29 Jan 2023 21:33:48 +0000 abhash.kumar 8698@http://www.k-wave.org/forum/ <p>Hi,   <br /> I am a new user of the k-wave toolbox, and though I read the user manual and collection of published papers on photoacoustic simulation, it is somewhat overwhelming for me to find out the most relevant tools from within the k-wave toolbox for my current purpose. I am currently working on imaging subsurface plastic pipelines that are deployed underground for public utilities. These plastic pipelines could be assumed to be elongated line source in the 3D subsurface of a layered medium. I am planning to use k-wave photoacoustic simulation in 3D to simulate the imaging of these plastic pipelines using time reversal image reconstruction capabilities of the k-wave toolbox. I checked the user forum and several html documentations within "helpfiles" folder of the toolbox, but I am still not sure about few critical issues that could help me to start simulating some very useful scenarios. I have outlined some of my concerns below, and I would really appreciate further suggestions/insight that could help me address them.</p> <p>1. Is there any tool to define a 3D layered medium and specify separate acoustic velocity for each layer? On page 32 of the manual, there is a code snippet to define a 3D layered medium, but I am not sure if it could be used to specify separate velocity for individual depth ranges corresponding to each layer of the medium.<br /> 2. Is it possible to define a linear collection of photoacoustic sources to simulate distributed sources for an elongate feature? Is there any parameter file that needs to be modified to create a linear collection of photoacoustic sources?<br /> 3. Can I create an array of point detectors with certain spacing above the soil-air interface to simulate the recording of photoacoustic signals at those point detectors? </p>