Contents

% Read FI linear dataset from the Alpinion Research scanner
%
%   This examples shows how to load FI data recorded on the Alpinion
%   Research scanner with L3-8_OMHR_Focused.py example sequence the into a
%   channel_data object and beamform it with the USTB routines. The data
%   should be in the path /data/Alpinion/FI_linear/ from the root folder of
%   the USTB. The data can be downloaded from:
%   https://www.dropbox.com/sh/wv7sa88dvhfszcl/AABYgOJixkKvQM_Q3jJlvFVWa?dl=0
%
%   date : 11.07.2017
%   author: Ole Marius Hoel Rindal (olemarius@olemarius.net)

close all

local_path = [ustb_path(),'/data/']; % location of example data in this computer

tag = 'FI_hyperechoic_scatterers';  % Dataset 1
%tag = 'FI_hypoechoic';             % Dataset 2
data_folder  = [local_path,'Alpinion/FI_linear/',tag];

initiate Alpinion object pointing to files with data

alp = alpinion();
alp.data_folder = data_folder;

Create channel_data object

number_of_frames = 4;
start_frame = 2;
channel_data = alp.read_FI_linear(number_of_frames,start_frame);

Error using alpinion/read_FI_linear
Error: File: \\kant\ifi-ansatt-u08\omrindal\Repos\USTB_summer_student_2021\@alpinion\read_FI_linear.m Line: 29 Column: 47
Invalid syntax for calling function 'Parameter' on the path. Use a valid syntax or explicitly initialize 'Parameter' to make it a variable.

Error in L3_8_FI (line 28)
channel_data = alp.read_FI_linear(number_of_frames,start_frame);

Define image scan

z_axis=linspace(1e-3,55e-3,512).';
x_axis=zeros(channel_data.N_waves,1);
for n=1:channel_data.N_waves
    x_axis(n) = channel_data.sequence(n).source.x;
end

scan=uff.linear_scan('x_axis',x_axis,'z_axis',z_axis);

Define BEAMFORMER pipeline

midproc=midprocess.das();
midproc.channel_data=channel_data;
midproc.scan=scan;
midproc.dimension = dimension.both();
midproc.transmit_apodization.window=uff.window.scanline;
midproc.receive_apodization.window=uff.window.tukey25;
midproc.receive_apodization.f_number=1.7;

% Do beamforming
b_data=midproc.go();

Show image

b_data.plot(11,['Alpinion FI dataset'],60);

answer = questdlg('Do you want to save this dataset?');
if strcmp(answer,'Yes')

    if strfind(tag, 'scatterers')
        channel_data.name = {'FI dataset of hyperechoic cyst and points scatterers recorded on an Alpinion scanner with a L3-8 Probe from a CIRS General Purpose Ultrasound Phantom'};
    else
        channel_data.name = {'FI dataset of hypoechic cyst recorded on an Alpinion scanner with a L3-8 Probe from a CIRC General Purpose Ultrasound Phantom'};
    end
    channel_data.author = {'Ole Marius Hoel Rindal <olemarius@olemarius.net>','Muyinatu Lediju Bell <mledijubell@jhu.edu>'};
    channel_data.reference = {'www.ultrasoundtoolbox.com'};
    channel_data.version = {'1.0.2'};

    uff_filename = ['./Alpinion_L3-8_',tag,'.uff']
    channel_data.write(uff_filename,'channel_data');

end

Published with MATLAB® R2020b