tutorials.6

Tutorial - Receive Setup

Python

from helpers import makeLinearArrayUac, makeReceiveSetupUac


# Receive parameters
sampling_frequency = 33.3e6  # sampling frequency of the backscattered signal [Hz]
modulation_frequency = 8.33e6  # modulation frequency of the backscattered signal [Hz]
n_samples = 800  # number of received samples for each transmit event
rx_time_offset = 1.2e-6  # time before the sampling of the received signal [s]

# Probe parameters
probe_description = "SL10-2 192 elements"  # description or name of the probe
n_elements = 192  # number of transducers in the ultrasound probe
pitch = 300e-6  # pitch (spatial step) of the array [m]
width = 280e-6  # width of a single transducer [m]
height = 6e-3  # height of a single transducer [m]
# kerf = pitch - width  # space between adjacent transducer elements [m]
channel_mapping = [
    [i] for i in range(n_elements)
]  # order of channels in the interface (start at 0)

# Probe
probe = makeLinearArrayUac(
    n_elements, pitch, width, height, probe_description
)  # build the probe

# Receive
# receive_setup =
makeReceiveSetupUac(
    n_samples, rx_time_offset, sampling_frequency, modulation_frequency, channel_mapping, probe
)  # build the receive setup

Matlab

%% Receive parameters 
SamplingFrequency = 33.3e6;                 % sampling frequency of the backscattered signal [Hz]
ModulationFrequency = 8.33e6;               % modulation frequency of the backscattered signal [Hz]
NSamples = 800;                             % number of received samples for each transmit event
RxTimeOffset = 1.2e-6;                      % time before the sampling of the received signal [s]

%% Probe parameters
ProbeDescription = 'SL10-2 192 elements';   % description or name of the probe
NElements = 192;                            % number of transducers in the ultrasound probe
Pitch = 300e-6;                             % pitch (spatial step) of the array [m]
Width = 280e-6;                             % width of a single transducer [m]
Height = 6e-3;                              % height of a single transducer [m]
Kerf = Pitch - Width;                       % space between adjacent transducer elements [m]
ChannelMapping = 0:NElements-1;             % order of channels in the interface (start at 0)

%% Probe
Probe = makeLinearArrayUac(NElements, Pitch, Width, Height, ProbeDescription);         % build the probe

%% Receive
ReceiveSetup = makeReceiveSetupUac(NSamples, RxTimeOffset, SamplingFrequency, ModulationFrequency, ChannelMapping, Probe);        % build the receive setup

disp(ReceiveSetup)

C++

#include "helpers.h"

#include <cstdint>
#include <memory>
#include <string>
#include <utility>
#include <vector>

int main() {
  // Receive parameters
  const double sampling_frequency = 33.3e6;  // sampling frequency of the backscattered signal [Hz]
  const double modulation_frequency =
      8.33e6;                            // modulation frequency of the backscattered signal [Hz]
  const int n_samples = 800;             // number of received samples for each transmit event
  const double rx_time_offset = 1.2e-6;  // time before the sampling of the received signal [s]

  // Probe parameters
  const std::string probe_description = "SL10-2 192 elements";  // description or name of the probe
  const int n_elements = 192;         // number of transducers in the ultrasound probe
  const double pitch = 300e-6;        // pitch (spatial step) of the array [m]
  const double width = 280e-6;        // width of a single transducer [m]
  const double height = 6e-3;         // height of a single transducer [m]
  const double kerf = pitch - width;  // space between adjacent transducer elements [m]

  // Create channel mapping vector (equivalent to range(NElements))
  std::vector<std::vector<uint32_t>> channel_mapping(n_elements);
  for (uint32_t i = 0; i < n_elements; ++i) {
    channel_mapping[i] = {i};
  }

  // Probe
  auto probe =
      makeLinearArrayUac(n_elements, pitch, width, height, probe_description);  // build the probe

  // Receive
  auto receive_setup =
      makeReceiveSetupUac(n_samples, rx_time_offset, sampling_frequency, modulation_frequency,
                          channel_mapping, probe);  // build the receive setup
  return 0;
}