http://www.k-wave.org/forum/topic/how-to-generate-a-cylindrical-transducer-in-3d-space Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:32:12 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/how-to-generate-a-cylindrical-transducer-in-3d-space#post-6659 Sat, 24 Nov 2018 15:33:48 +0000 peiliu 6659@http://www.k-wave.org/forum/ <p>oh,thank you very much!For some reason I didn't see your reply until now.I have solved the problem.But thank you all the same.Your suggestion has given me a lot of inspiration,thank you a lot~ </p> http://www.k-wave.org/forum/topic/how-to-generate-a-cylindrical-transducer-in-3d-space#post-6653 Fri, 16 Nov 2018 11:33:50 +0000 Anthony 6653@http://www.k-wave.org/forum/ <p>PS : By the way I made the code easy to read but, of course, the use of bsxfun() is much more elegant than repmat() ;-)</p> <pre><code>%% Axis permutation (I assume a main propagation axis along Z and a main cylinder axis along Y) arcMask = reshape(arcMask,[Nx,1,Nz]); extrusionVector = [zeros(1,(Ny-L)/2),ones(1,L),zeros(1,(Ny-L)/2)]; source.p_mask = bsxfun(@times,arcMask,extrusionVector);</code></pre> http://www.k-wave.org/forum/topic/how-to-generate-a-cylindrical-transducer-in-3d-space#post-6652 Fri, 16 Nov 2018 11:27:26 +0000 Anthony 6652@http://www.k-wave.org/forum/ <p>Hi, </p> <p>I am using k-Wave since a few years, so there might be quicker ways to do it now, but you can define transducers of arbitrary shape by making a binary mask. </p> <p>See the example entitled "Simulating Transducer Field Patterns Example".</p> <p>A simple way of making a cylinder is, for example, to use makeArc and then extrude the arc:</p> <pre><code>clearvars close all clc % Transducers parameters R = 11; % curvature radius (unit: grid points) L = 21; % cylinder length (unit: grid points) diameter = 15; % aperture diameter (length of line connecting arc endpoints) (unit: grid points) % Binary mask initialisation Nx = 25; % my example only works properly if it is odd Ny = 25; % my example only works properly if it is odd Nz = 35; %% Arc in 2D arcMask = makeArc([Nx, Nz], [ceil(Nx/2) 2], R, diameter, [ceil(Nx/2) Nz]); figure(1) clf imagesc(arcMask); axis image %% Axis permutation (I assume a main propagation axis along Z and a main cylinder axis along Y) arcMask = reshape(arcMask,[Nx,1,Nz]); source.p_mask = repmat(arcMask,[1 Ny 1]); % extrusion source.p_mask(:,1:(Ny-L)/2,:) = 0; % crop the left border source.p_mask(:,Ny-(Ny-L)/2+1:Ny,:) = 0; % crop the right border %% 3D display voxelPlot(source.p_mask); % just for fun</code></pre> http://www.k-wave.org/forum/topic/how-to-generate-a-cylindrical-transducer-in-3d-space#post-6649 Thu, 15 Nov 2018 15:48:17 +0000 peiliu 6649@http://www.k-wave.org/forum/ <p>Hello，<br /> Thank you for your toolbox.And I'm a student in high school.I'm confusing how to generate a cylinfrical in 3D Kgrid? Itry to refer the planar transducer but failed.Can you help me.<br /> Thanks in advance! </p>