http://www.k-wave.org/forum/topic/a-little-difference-between-matlab-function-kspacefirstorder3d-and-its-c-code Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:36:47 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/a-little-difference-between-matlab-function-kspacefirstorder3d-and-its-c-code#post-6345 Thu, 15 Mar 2018 12:24:43 +0000 biaojiang 6345@http://www.k-wave.org/forum/ <p>HI, Bradley,</p> <p>Thanks. Yes, I used Hanning transmit apodization, so the results are not correct, and I should set "Rectangular"? Why there were no warnings when I set "Hanning".</p> <p>Best<br /> Biao </p> http://www.k-wave.org/forum/topic/a-little-difference-between-matlab-function-kspacefirstorder3d-and-its-c-code#post-6321 Wed, 07 Mar 2018 22:24:34 +0000 Bradley Treeby 6321@http://www.k-wave.org/forum/ <p>Hi biaojiang,</p> <p>Are you using a transmit apodization? See <a href="http://www.k-wave.org/forum/topic/question-about-the-transducercombine_sensor_data-method#post-4769">here</a>.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/a-little-difference-between-matlab-function-kspacefirstorder3d-and-its-c-code#post-6301 Tue, 27 Feb 2018 10:36:06 +0000 biaojiang 6301@http://www.k-wave.org/forum/ <p>Hi, anyone noticed that there is a little difference with the output <code>sensordata</code> from the Matlab function kspaceFirstOrder3D and its C++ version kspaceFirstOrder3DC?</p> <p>It can be tested with <code>example_us_bmode_linear_transducer.m</code>. It can be found there is a time shift between the Matlab and C++ waveform, and the transmitting waveform ( the header of the receiving waveform) are not the same. Maybe due to the function of the <code>transducer.combine_sensor_data</code>?</p> <p>For the finial B-mode image, the background level of C++ is a little higher than that of Matlab's. </p>