Contents

Read CPWC dataset from the Alpinion Research scanner

This examples shows how to load CPWC data recorded on the Alpinion
Research scanner into with L3-8_OMHR_CPWC.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

% Set up filepath to files with parameters and data from the Alpinion scanner

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

tag = 'CPWC_hyperechoic_scatterers';    % Dataset 1
tag = 'CPWC_hypoechoic'                 % Dataset 2
data_folder  = [local_path,'/Alpinion/CPWC/',tag];

tag =

    'CPWC_hypoechoic'

initiate Alpinion object pointing to files with data

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

Create channel_data object

number_of_planewaves = 21;
number_of_frames = 4;
channel_data = alp.read_CPWC(number_of_planewaves,number_of_frames);

Error using alpinion/read_CPWC
Error: File: \\kant\ifi-ansatt-u08\omrindal\Repos\USTB_summer_student_2021\@alpinion\read_CPWC.m Line: 33 Column: 35
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_CPWC (line 30)
channel_data = alp.read_CPWC(number_of_planewaves,number_of_frames);

SCAN

sca=uff.linear_scan();
sca.x_axis = linspace(channel_data.probe.x(1),channel_data.probe.x(end),512).'
sca.z_axis = linspace(1e-3,55e-3,512).'

BEAMFORMER pipeline

pipe=pipeline();
pipe.channel_data=channel_data;
pipe.scan=sca;

pipe.receive_apodization.window=uff.window.boxcar;
pipe.receive_apodization.f_number=1.7;
pipe.transmit_apodization.window=uff.window.boxcar;
pipe.transmit_apodization.f_number=1.7;

b_data = pipe.go({midprocess.das() postprocess.coherent_compounding()});

Display image

b_data.plot(1,['CPWC : ',num2str(size(channel_data.data,3)), ' angles'],50);

answer = questdlg('Do you want to save this dataset?');
if strcmp(answer,'Yes')
    if strfind(tag, 'scatterers')
        channel_data.name = {'CPWC 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 = {'CPWC 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 = {'1.0.1'};

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

Published with MATLAB® R2020b