Image Resampling

Example

global planC
indexS = planC{end};

% Specify scan & structure
scanNum = 1;
strNum = 3; 

% Get scan and mask 
scan3M = double(getScanArray(scanNum,planC));
CToffset = planC{indexS.scan}(scanNum).scanInfo(1).CTOffset;
scan3M = scan3M - double(CToffset);
mask3M = getStrMask(strNum,planC);

% Get input grid, origin & resolution
[xValsV, yValsV, zValsV] = getScanXYZVals(planC{indexS.scan}(scanNum));
if yValsV(1) > yValsV(2)
    yValsV = fliplr(yValsV);
end
originV = [xValsV(1),yValsV(1),zValsV(end)];


% Specify resampling parameters
outputResV =  [0.1 0.1 0.15]
resampleMethod = 'linear'; %select from: 'linear','cubic','nearest',
                           %'makima','spline','sinc'.
roiResampleMethod = 'linear';
gridAlignMethod = 'center';
extrapVal = 0;

[xResampleV,yResampleV,zResampleV] = ...
    getResampledGrid(outputResV,xValsV,yValsV,zValsV,originV,gridAlignMethod);

outScan3M = imgResample3d(double(scan3M),xValsV,yValsV,zValsV,...
    xResampleV,yResampleV,zResampleV,resampleMethod,extrapVal);

outMask3M = imgResample3d(single(mask3M),xValsV,yValsV,...
    zValsV,xResampleV,yResampleV,zResampleV,roiResampleMethod) >= 0.5;


% Add resampled scan to to planC
scanInfoS.horizontalGridInterval = outputResV(1);
scanInfoS.verticalGridInterval = outputResV(2);
scanInfoS.coord1OFFirstPoint = xResampleV(1);
scanInfoS.coord2OFFirstPoint = yResampleV(1);
scanInfoS.zValues = zResampleV;
sliceThicknessV = diff(zResampleV);
scanInfoS.sliceThickness = [sliceThicknessV,sliceThicknessV(end)];

% Add resampled mask to planC
planC = scan2CERR(outScan3M,'scan1_resampled','',scanInfoS,'',planC);
newScanNum = length(planC{indexS.scan});
strName = 'struct_resampled';
planC = maskToCERRStructure(outMask3M,0,newScanNum,strName,planC);