http://www.k-wave.org/forum/topic/modelling-a-multi-element-annular-focused-transducer Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 03:09:42 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/modelling-a-multi-element-annular-focused-transducer#post-8230 Thu, 01 Jul 2021 11:06:52 +0000 sitiyaakub 8230@http://www.k-wave.org/forum/ <p>Hi Brad,</p> <p>Thanks! I will check it out.</p> <p>Siti </p> http://www.k-wave.org/forum/topic/modelling-a-multi-element-annular-focused-transducer#post-8176 Tue, 08 Jun 2021 14:49:58 +0000 Bradley Treeby 8176@http://www.k-wave.org/forum/ <p>Hi Siti,</p> <p>I've just uploaded a new version of kWaveArray (alpha 0.3) that includes support for annular arrays. Unfortunately, this won't solve the memory issues, as internally you still need a time series for each grid point in the source mask. We've got a solution in the works, hopefully with the next release.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/modelling-a-multi-element-annular-focused-transducer#post-8134 Wed, 21 Apr 2021 10:31:59 +0000 sitiyaakub 8134@http://www.k-wave.org/forum/ <p>Hi there,</p> <p>I'm trying to model a multi-element focused ultrasound transducer made up of a central bowl element and subsequent elements in the shape of annular rings. There is a small gap between each element. I have managed to model it using the makeBowl function for the inner bowl, and each subsequent annular ring I made by subtracting a bowl with the inner diameter from a bowl with the outer diameter of each ring. This works fine if I use the same time-varying source for all elements of the transducer, but I run into memory issues if I try to give different elements different source.p values, for a 3D grid of size 256x256x256.</p> <p>I tried looking at the new kWaveArray toolbox, but I cannot figure out how to model non-overlapping bowls (and the small gap between elements) using the addBowlElement functionality. Is there some other functionality I should be using?</p> <p>Alternatively is there a more memory-efficient way to assign different time-varying pressure sources for each element within the kWave toolbox (without using kWaveArray)? Perhaps my grid size is too large to begin with? I was trying to fit a full head image into the simulation. </p> <p>Thank you,<br /> Siti </p>