http://www.k-wave.org/forum/topic/the-difference-between-2-dimension-and-3dimension Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 01:09:41 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/the-difference-between-2-dimension-and-3dimension#post-8370 Thu, 16 Dec 2021 10:52:15 +0000 Bradley Treeby 8370@http://www.k-wave.org/forum/ <p>Hi Kate,</p> <p>A simulation in 2D is equivalent to a simulation in 3D where the out-of-plane dimension is infinitely repeated. So a dot in 2D is actually a line in 3D, and an arc in 2D is actually a cylindrically focused transducer of infinite length in 3D. </p> <p>If you try and simulate a focused HIFU source, this means the focusing gain will be much less if you simulate an arc transducer in 2D (cylindrically focused) than if you simulate a bowl transducer in 3D (spherically focused). </p> <p>Similarly when you are simulating heat diffusion. In 2D, the heat from the focal region can only diffusive in x and y (remember the heat source is infinitely repeated in the out-of-plane direction). In 3D, it can diffusive in x, y, and z.</p> <p>Note, the description above is not at all related to k-Wave, but to simulations in 2D vs 3D in general.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/the-difference-between-2-dimension-and-3dimension#post-8338 Tue, 09 Nov 2021 07:16:17 +0000 kate1233 8338@http://www.k-wave.org/forum/ <p>Dear Bradley Treeby<br /> I am a student studying HIFU simulation .Rencently ,I use k-wave to simulate the two dimension<br /> and the three dimension of laminated tissue therapeutic process. Now ,I found the the temperature and heat dose with great differneces between 2 dimension and 3 dimension .I am confused about this result because thermal damage of three dimension is about 624.8mm^2 and two dimension is about 10.175mm^2（three periods with 1 second on time and 3 second off time ）at the same time the temperature of three is over 968°C only in one period and the temperature of two is over 73.68°C in one period.I also simulate in water between the two and three dimension and the difference of focus pressure is 15 times . </p>