http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 01:46:22 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-6561 Thu, 16 Aug 2018 23:41:54 +0000 bencox 6561@http://www.k-wave.org/forum/ <p>Hi Mengxiao, </p> <p>There are two examples of non-iterative 3D time reversal in the toolbox, maybe start with those? Adapt them to be iterative by adding a forward simulation based on the latest estimate of the initial pressure distribution and then time reversing the difference between the measured and modelled time series, then iterating between the time reversal and forward modelling steps. Perhaps use the 2D code as a guide.</p> <p><a href="http://www.k-wave.org/documentation/example_pr_3D_tr_planar_sensor.php">http://www.k-wave.org/documentation/example_pr_3D_tr_planar_sensor.php</a><br /> <a href="http://www.k-wave.org/documentation/example_pr_3D_tr_spherical_sensor.php">http://www.k-wave.org/documentation/example_pr_3D_tr_spherical_sensor.php</a></p> <p>Best wishes,<br /> Ben </p> http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-6546 Thu, 09 Aug 2018 21:58:41 +0000 wang mengxiao 6546@http://www.k-wave.org/forum/ <p>I modified Iterative Image Improvement Using Time Reversal Example, i changed the kSpaceFirstOrder2D to kSpaceFirstOrder3D, but it shows the error: reference to non-existent field 'p'. Can someone explain why it shows the error. Thank you very much.</p> <p>Best,<br /> Mengxiao </p> http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-6545 Thu, 09 Aug 2018 21:46:52 +0000 wang mengxiao 6545@http://www.k-wave.org/forum/ <p>Why i can't simulate Iterative Image Improvement Using Time Reversal in 3D? And can you help me about this? </p> http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-5015 Sun, 22 Mar 2015 18:45:06 +0000 bencox 5015@http://www.k-wave.org/forum/ <p>asi, </p> <p>We're here to help with k-Wave, not anything that you could look up yourself! Try googling it as a start. Please post here only if you have a question related to k-Wave.</p> <p>Best wishes,<br /> Ben </p> http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-5010 Thu, 19 Mar 2015 08:29:53 +0000 asi 5010@http://www.k-wave.org/forum/ <p>Hi Ben,</p> <p>can you please direct me to some references regarding iterative image reconstruction, like papers or an educative book on imaging. </p> <p>thanks,</p> <p>asi. </p> http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-4927 Mon, 05 Jan 2015 11:24:40 +0000 bencox 4927@http://www.k-wave.org/forum/ <p>Hi asi, </p> <p>Is this a photoacoustic imaging question? Iterative image reconstruction is much too big a topic to cover here in any general sense. k-Wave doesn't have any built-in iterative photoacoustic reconstruction algorithms, but you could iterate them by using the reconstructed image as a <code>source.p0</code> in <code>kSpaceFirstOrder3D</code>, saving the output at the positions of the detectors and reconstructing again. If you are detecting over a limited area, ie. not all around the object, then this may improve your image as each time you run the forward model it reimposes the (physically true) condition that the initial particle velocity is zero. There is an example in the Toolbox that does this: <a href="http://www.k-wave.org/documentation/example_pr_2D_tr_iterative.php">Iterative Image Improvement Using Time Reversal Example</a><a>.</p> <p>Ben</a> </p> http://www.k-wave.org/forum/topic/iterative-algorithm-of-image-reconstruction#post-4913 Mon, 22 Dec 2014 13:05:49 +0000 asi 4913@http://www.k-wave.org/forum/ <p>Hi there,</p> <p>can someone explain how the iterative image reconstruction work ?</p> <p>Thanks,</p> <p>asi. </p>