http://www.k-wave.org/forum/topic/back-projection-implementation Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:32:11 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/back-projection-implementation#post-8317 Mon, 27 Sep 2021 02:15:16 +0000 zengqw2021 8317@http://www.k-wave.org/forum/ <p>Hi everyone,<br /> I'm new to photoacoustic imaging. I want to know how to implement the backprojection algorithm. Could someone give me a reference program.My email is <a href="mailto:zengqingwei519@yahoo.com">zengqingwei519@yahoo.com</a>. m.files is the best.<br /> Thanks in advance. </p> http://www.k-wave.org/forum/topic/back-projection-implementation#post-6521 Fri, 13 Jul 2018 22:03:47 +0000 Bradley Treeby 6521@http://www.k-wave.org/forum/ <p>Hi Martin,</p> <p>Could you give a few more details of the problem?</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/back-projection-implementation#post-6514 Thu, 12 Jul 2018 08:41:19 +0000 happy martin 6514@http://www.k-wave.org/forum/ <p>Dear Dr. Treeby </p> <p>I got sensor_data_2D and sensor_data_3D from k-wave tool box,then I want to use these data to reconstruction by back projection algorithm in PAT.But,reconstruction amplitude is not correct.before this simulation,back projection algorithm has been tested with the theory n-sharp(from sphercial absorber)and no problem.</p> <p>Thank you and Regards</p> <p>martin </p> http://www.k-wave.org/forum/topic/back-projection-implementation#post-1324 Fri, 01 Mar 2013 15:21:36 +0000 Bradley Treeby 1324@http://www.k-wave.org/forum/ <p>Hi Tim,</p> <p>The <code>sensor_data</code> that is returned after a k-Wave simulation contains the time-varying pressure signal recorded at each of the sensor points specified by <code>sensor.mask</code>. It is indexed as <code>sensor_data(sensor_point_index, time_index)</code>. If you use a Cartesian sensor mask, the sensor points are returned in the same order as the list of Cartesian points. If you use a binary sensor mask, the sensor points are returned according to MATLAB’s column-wise linear matrix index ordering (there is some more information in k-Wave manual in Secs. 3.4 and 3.5). </p> <p>Given the numerical sensor data, you can then use this with your back-projection algorithm the same way as you would with experimental data.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/back-projection-implementation#post-1323 Fri, 01 Mar 2013 12:03:42 +0000 tim_man 1323@http://www.k-wave.org/forum/ <p>Dear Dr. Treeby and Dr. Cox,</p> <p>thanks for sharing this excellent and well documented toolbox. </p> <p>I would like to know the appropriate way to use the sensor_data or the sensor_data.p after some simulations, to implement a back projection algorithm in PAT.</p> <p>Kind regards,<br /> Tim </p>