Dear Bradley Treeby
I am a student studying HIFU simulation .Rencently ,I use k-wave to simulate the two dimension
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 .
k-Wave
A MATLAB toolbox for the time-domain
simulation of acoustic wave fields
The difference between 2 dimension and 3dimension
(2 posts) (2 voices)-
Posted 3 years ago #
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Hi Kate,
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.
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).
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.
Note, the description above is not at all related to k-Wave, but to simulations in 2D vs 3D in general.
Hope that helps,
Brad.
Posted 2 years ago #
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