http://www.k-wave.org/forum/topic/black-area-on-the-top-of-ultrasound-b-mode-image Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 09:13:17 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/black-area-on-the-top-of-ultrasound-b-mode-image#post-7230 Wed, 12 Feb 2020 16:10:49 +0000 Bradley Treeby 7230@http://www.k-wave.org/forum/ <p>Hi Vasiliki,</p> <p>This appears because the first part of the received signal is windowed out (see the "Remove Input Signal" part of the code). This is to remove the signal that travels directly from element to element.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/black-area-on-the-top-of-ultrasound-b-mode-image#post-7204 Mon, 03 Feb 2020 16:59:10 +0000 vasl12 7204@http://www.k-wave.org/forum/ <p>Hi!</p> <p>By reading the documentation and running the example <code>example_us_bmode_linear_transducer</code> I noticed that there is a black area on the top of the bmode image.</p> <p>Examples of images that describe can be found: <a href="http://www.k-wave.org/documentation/example_us_bmode_phased_array.php">Here in the documentation for a phased array</a> and <a href="http://www.k-wave.org/documentation/example_us_bmode_linear_transducer.php">here for a linear array</a>. In the second link the bmode image is cropped.</p> <p> <img src="http://www.k-wave.org/documentation/images/example_us_bmode_phased_array_01.png" alt="Phased" /><br /> <img src="http://www.k-wave.org/documentation/images/example_us_bmode_linear_transducer_08.png" alt="Linear" /></p> <p>I was wondering why this area exist there and what significance it has.</p> <p>Thank you very much!</p> <p>Best,<br /> Vasiliki </p>