http://www.k-wave.org/forum/topic/transcranial-focused-ultrasound Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:44:58 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/transcranial-focused-ultrasound#post-7779 Sun, 30 Aug 2020 00:51:16 +0000 anil 7779@http://www.k-wave.org/forum/ <p>Bradley,</p> <p>Thank you for your detailed explanation. It is really interesting to see this variety of numbers.</p> <p>Best,<br /> Prof. AK </p> http://www.k-wave.org/forum/topic/transcranial-focused-ultrasound#post-7742 Wed, 19 Aug 2020 14:39:34 +0000 Bradley Treeby 7742@http://www.k-wave.org/forum/ <p>Hi Prof. AK,</p> <p>There are a variety of different coefficients for the attenuation of bone. <a href="https://doi.org/10.1118/1.3668316">This paper</a> uses values quite a bit lower if you are only interested in the absorption, and are modelling the scattering by using a heterogeneous skull.</p> <p>The other equations look correct at first glance.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/transcranial-focused-ultrasound#post-7706 Mon, 27 Jul 2020 02:48:13 +0000 anil 7706@http://www.k-wave.org/forum/ <p>* Since the source is in the water.<br /> rho0 = water's density<br /> c0 = water's compressional wave speed </p> http://www.k-wave.org/forum/topic/transcranial-focused-ultrasound#post-7697 Sun, 12 Jul 2020 21:14:43 +0000 anil 7697@http://www.k-wave.org/forum/ <p>Hi Bradley,</p> <p>I am working on transcranial ultrasound simulations with the "pstdElastic2D" function at 0.5, 0.75, 1, and 1.25 MHz.<br /> I use 19.5 for shear wave attenuation and 8.83 for compressional wave attenuation.<br /> I define my source waveform and surface intensity with following part of the code:</p> <p>source_freq = 1e6; % [Hz]<br /> source_surface_intensity = 5; % [W/cm^2]<br /> source_strength = sqrt(2*source_surface_intensity*1e4*rho0*c0); % [Pa]<br /> source.sxx = -createCWSignals(kgrid.t_array, source_freq, source_strength, 0);<br /> source.syy = source.sxx;</p> <p>I was wondering if the definition above and the attenuation constants are valid for k-Wave.</p> <p>Best,<br /> Prof. AK </p>