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1. dhchen
   

   Member
   Joined: Apr '18
   Posts: 4

   Hi,
   I have a CT volume and I want to simulate Ultrasound image from it. I have used hounsfield2density to get the speed and density, but I have no idea how to adjust the parameters in example_us_bmode_linear_transducer.m.

   % load volumeData from zraw
   Nx = size(volumeData,1); % [grid points]
   Ny = size(volumeData,2); % [grid points]
   Nz = size(volumeData,3); % [grid points]

   ...

   for scan_line_index = 1:number_scan_lines
   ...
   [ct_density, ct_sound_speed] = hounsfield2density(volumeData);
   medium.sound_speed = ct_sound_speed(:, medium_position:medium_position + Ny - 1, :);
   medium.density = ct_density(:, medium_position:medium_position + Ny - 1, :);
   % medium.sound_speed = sound_speed_map(:, medium_position:medium_position + Ny - 1, :);
   % medium.density = density_map(:, medium_position:medium_position + Ny - 1, :);
   ...

   Is it right? Can anyone give me some suggestions? Thanks.

   Posted 6 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi dhchen,

   That looks like the correct approach. You will likely also need to add some small scale scatterers (e.g., using random noise) to the background values so you can see contrast on the generated ultrasound image.

   Brad.

   Posted 6 years ago #

3. khoslaygr26
   

   Member
   Joined: Nov '18
   Posts: 2

   Hi
   In the above code what is exactly in the Volume data.
   where can one find this CT data for the feet (specifically the calcenous or heel bone).
   Are they images or simply matrices of HU values?
   I want to use the data to simulate ultrasound within the heel.
   Thanks
   Kunal

   Posted 5 years ago #

4. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Kunal,

   The volume data is the CT image in Hounsfield units. Although note an image is just a matrix of numbers. Unfortunately, I don't have any idea about CT data for the feet.

   Brad.

   Posted 5 years ago #

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