http://www.k-wave.org/forum/topic/discrepancy-between-kspacefirstorder3dg-and-kspacefirstorder3d Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:24:36 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/discrepancy-between-kspacefirstorder3dg-and-kspacefirstorder3d#post-9173 Wed, 15 Jan 2025 13:07:12 +0000 Jiri Jaros 9173@http://www.k-wave.org/forum/ <p>Hi Rehman,<br /> Would it be possible to share your simulation setup (input file) with me to investigate the problem?</p> <p>Jiri </p> http://www.k-wave.org/forum/topic/discrepancy-between-kspacefirstorder3dg-and-kspacefirstorder3d#post-9147 Thu, 03 Oct 2024 20:43:11 +0000 rali2 9147@http://www.k-wave.org/forum/ <p>Hello All,</p> <p>Long time k-Wave user here. In the past, I've mostly used the 2D simulator, but I recently started using the 3D codes to simulate data for 3D ultrasound tomography.</p> <p>I noticed that when I ran the same simulation in kspaceFirstOrder3D vs kspaceFirstOrder3DG, I would get different results. The difference between the results is not simply roundoff error. There are significant delays between the signals simulated by kspaceFirstOrder3D vs kspaceFirstOrder3DG. I suspect the discrepancy might have to do with dispersion. Are there any known (or unknown?) dispersion-related issues with kspaceFirstOrder3DG? </p> <p>Please let me know if you would like me to share some sample code with the example that produces the discrepancy.</p> <p>Thank you,<br /> Rehman Ali </p>