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the mean dose objective has now the option to choose optimization of …
…a linear or quadratic difference to a reference value
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@@ -20,19 +20,17 @@ | |
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properties (Constant) | ||
name = 'Mean Dose'; | ||
parameterNames = {'d^{ref}'}; | ||
parameterTypes = {'dose'}; | ||
%parameterNames = {}; | ||
%parameterIsDose = []; | ||
parameterNames = {'d^{ref}','f_{diff}'}; %When optimizing to a reference, one might consider using a quadratic relationship with a non-linear optimizer | ||
parameterTypes = {'dose',{'Linear','Quadratic'}}; | ||
end | ||
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properties | ||
parameters = {0}; | ||
parameters = {0,1}; | ||
penalty = 1; | ||
end | ||
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methods | ||
function obj = matRad_MeanDose(penalty,dMeanRef) | ||
function obj = matRad_MeanDose(penalty,dMeanRef,fDiff) | ||
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% if we have a struct in first argument | ||
if nargin == 1 && isstruct(penalty) | ||
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@@ -47,7 +45,22 @@ | |
[email protected]_DoseObjective(inputStruct); | ||
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if ~initFromStruct | ||
if nargin == 2 && isscalar(dMeanRef) | ||
if nargin < 3 || ~ischar(fDiff) | ||
fDiff = 'Linear'; | ||
end | ||
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fDiffIx = find(strcmp(fDiff,obj.parameterTypes{2})); | ||
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if isempty(fDiffIx) || numel(fDiffIx) > 1 | ||
fDiffIx = 1; | ||
matRad_cfg = MatRad_Config.instance(); | ||
matRad_cfg.dispWarning('Mean dose difference function can only be %s! Using %s difference.', strjoin(obj.parameterTypes{2},' or '), obj.parameterTypes{2}{fDiffIx}); | ||
end | ||
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obj.parameters{2} = fDiffIx; | ||
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if nargin >= 2 && isscalar(dMeanRef) | ||
obj.parameters{1} = dMeanRef; | ||
end | ||
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@@ -60,14 +73,46 @@ | |
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%% Calculates the Objective Function value | ||
function fDose = computeDoseObjectiveFunction(obj,dose) | ||
%fDose = obj.penalty * abs(mean(dose(:)) - obj.parameters{1}); | ||
fDose = obj.penalty * (mean(dose(:)) - obj.parameters{1})^2; | ||
switch obj.parameters{2} | ||
case 1 | ||
fDose = obj.penalty * obj.objectiveLinearDiff(dose); | ||
case 2 | ||
fDose = obj.penalty * obj.objectiveQuadraticDiff(dose); | ||
otherwise | ||
matRad_cfg = MatRad_Config.instance(); | ||
matRad_cfg.dispError('Invalid setting for %s in Mean Dose Objective!',obj.parameterNames{2}); | ||
end | ||
end | ||
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%% Calculates the Objective Function gradient | ||
function fDoseGrad = computeDoseObjectiveGradient(obj,dose) | ||
%fDoseGrad = (obj.penalty/numel(dose))*sign(dose(:)-obj.parameters{1}); | ||
fDoseGrad = obj.penalty*2*(mean(dose(:))-obj.parameters{1}) * ones(size(dose(:)))/numel(dose); | ||
switch obj.parameters{2} | ||
case 1 | ||
fDoseGrad = obj.penalty * obj.gradientLinearDiff(dose); | ||
case 2 | ||
fDoseGrad = obj.penalty * obj.gradientQuadraticDiff(dose); | ||
otherwise | ||
matRad_cfg = MatRad_Config.instance(); | ||
matRad_cfg.dispError('Invalid setting for %s in Mean Dose Objective!',obj.parameterNames{2}); | ||
end | ||
end | ||
end | ||
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methods (Access = protected) | ||
function fDose = objectiveQuadraticDiff(obj,dose) | ||
fDose = (mean(dose(:)) - obj.parameters{1})^2; | ||
end | ||
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function fDoseGrad = gradientQuadraticDiff(obj,dose) | ||
fDoseGrad = 2*(mean(dose(:))-obj.parameters{1}) * ones(size(dose(:)))/numel(dose); | ||
end | ||
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function fDose = objectiveLinearDiff(obj,dose) | ||
fDose = abs(mean(dose(:)) - obj.parameters{1}); | ||
end | ||
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function fDoseGrad = gradientLinearDiff(obj,dose) | ||
fDoseGrad = (1/numel(dose))*sign(dose(:)-obj.parameters{1}); | ||
end | ||
end | ||
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