76 lines
3.1 KiB
Matlab
76 lines
3.1 KiB
Matlab
classdef RespiratoryPhase < Phase
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properties
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FullPhase = Phase;
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IMF = uint32(0);
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InspirationPositions = [];
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ExpirationPositions = [];
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end
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properties % (GetAccess = private) should become private
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InspirationTreshold = double(0);
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ExpirationTreshold = double(0);
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MaxRespPhase = double(0);
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MinRespPhase = double(0);
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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.ModePhases;
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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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prompt = {'Choose the IMF representing respiratory phase:'};
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dlgtitle = 'Respiratory Phase';
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dims = [1 60];
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definput = {'5'};
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opts.Interpreter = 'tex';
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answer = inputdlg(prompt,dlgtitle,dims,definput,opts);
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obj.IMF = str2num(answer{1})
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% SHOULD TRY TO USE GETPHASE FUNCTION
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% obj.IMF = imf_number;
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% GetPhase@Phase(obj.FullPhase,obj.IMF);
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obj.Values = obj.FullPhase(obj.IMF,:); %Phase corresponding to respiratory phase
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end
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function GetFrequency(obj,time)
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resp_inst_freq = (abs(diff(obj.Values))./diff(time))/(2*pi());
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obj.InstantaneousFreq = medfilt1(resp_inst_freq,3);
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figure
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scatter(time,[obj.InstantaneousFreq,0],8);
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mean_freq1 = mean(obj.InstantaneousFreq);
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hline = refline([0 mean_freq1]); % Reference line for maximum phase
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hline.Color = 'm';
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title('Respiratory Instantaneous Frequency');
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xlabel('Time (sec)')
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ylabel('Frequency (Hz)');
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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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obj.MaxRespPhase = max(obj.Values); % respiratory phase maxima
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obj.InspirationTreshold = 0.8*obj.MaxRespPhase; % inspiration treshold
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index1 = obj.Values > obj.InspirationTreshold; % frames above inpiration treshold
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indexNumeric1 = find(index1);
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values1 = obj.Values(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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obj.MinRespPhase = min(obj.Values); % respiratory phase minima
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obj.ExpirationTreshold = 0.8*obj.MinRespPhase; % systole treshold
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index2 = obj.Values < obj.ExpirationTreshold; % frames below the systole treshold
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indexNumeric2 = find(index2);
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values2 = obj.Values(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 |