55 lines
2.3 KiB
Matlab
55 lines
2.3 KiB
Matlab
classdef RespiratoryPhase < Phase
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properties
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FullPhase = Phase;
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SelectedPhase = [];
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InspirationPositions = [];
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ExpirationPositions = [];
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end
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methods %constructor
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function obj=RespiratoryPhase(Phase)
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if nargin==0;return;end
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% gets properties of superclass
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obj.FullPhase = Phase.Values;
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obj.WorkLoad = Phase.WorkLoad;
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obj.Video = Phase.Video;
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end
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% Choose the correct IMF depending on the work load
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function SelectPhase(obj)
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if strcmp(obj.WorkLoad,'Rest')
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imf_number = 5;
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else if strcmp(obj.WorkLoad,'Exercise')
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imf_number = 4;
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else if strcmp(obj.WorkLoad,'Continuous Acquisition')
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imf_number = 5;
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end
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end
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end
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obj.SelectedPhase = obj.FullPhase(imf_number,:); %Phase corresponding to respiratory phase
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end
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% Detects the frame's positions of inspiration moments
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function Inspiration(obj)
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max_resp_phase = max(obj.SelectedPhase); % respiratory phase maxima
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treshold_insp = 0.8*max_resp_phase; % inspiration treshold
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index1 = obj.SelectedPhase > treshold_insp; % frames above inpiration treshold
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indexNumeric1 = find(index1);
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values1 = obj.SelectedPhase(indexNumeric1);
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[ordered_values1 oredered_index1] = sort(values1);
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obj.InspirationPositions = indexNumeric1(oredered_index1); % sorts the frames in ascending respiratory phase
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end
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% Detects the frame's positions of expiration moments
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function Expiration(obj)
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min_resp_phase = min(obj.SelectedPhase); % respiratory phase minima
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treshold_exp = 0.8*min_resp_phase; % systole treshold
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index2 = obj.SelectedPhase < treshold_exp; % frames below the systole treshold
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indexNumeric2 = find(index2);
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values2 = obj.SelectedPhase(indexNumeric2);
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[ordered_values2 oredered_index2] = sort(values2);
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obj.ExpirationPositions = indexNumeric2(oredered_index2); % sorts the frames in ascending respiratory phase
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end
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end
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end |