how to open image .mhd

DEAR ALL,

Anyone know how to open this image as attached.

Answer 1

[DGM]

I don't know about the format, but here's a start. That should give you a volumetric image. Note that the data range is very narrow for its class, so it may require scaling just for viewing. Beyond that , the contrast still seems odd, so I don't know if there is other scaling that needs to be done.

fbasename = 'doseMonteCarlo1HR-Dose';

% read the header file and tokenize it
hdrstr = splitlines(fileread([fbasename '.mhd']));
hdrtok = regexp(hdrstr,'^(\w+)\s?=\s?(.+)$','tokens');

% reformat/clean the extracted info and shove it in a cell array
% i'm assuming that the field names always have the same case
hdrinfo = cell(0,2);
for k = 1:numel(hdrtok)-1
    thisline = hdrtok{k}{:};
    
    hdrinfo{k,1} = thisline{1};
    switch hdrinfo{k,1}
        case 'NDims'
            hdrinfo{k,2} = str2double(thisline{2});
        case {'TransformMatrix','Offset','CenterOfRotation','ElementSpacing','DimSize'}
            hdrinfo{k,2} = str2num(thisline{2}); %#ok<ST2NM>
        case {'BinaryData','BinaryDataByteOrderMSB','CompressedData'}
            hdrinfo{k,2} = strcmpi(thisline{2},'True');
        otherwise
            hdrinfo{k,2} = thisline{2};
    end
end

% convert it to a struct
hdrinfo = cell2struct(hdrinfo(:,2),hdrinfo(:,1),1)

% get the machine format parameter for fread
if hdrinfo.BinaryDataByteOrderMSB
    machfmt = 'ieee-be';
else
    machfmt = 'ieee-le';
end

% read the file according to the header info
fid = fopen(hdrinfo.ElementDataFile);
switch hdrinfo.ElementType
    case 'MET_SHORT'
        inpict = fread(fid,'*int16',machfmt);
    case 'MET_FLOAT'
        inpict = fread(fid,'*float32',machfmt);
    otherwise
        % idk what other formats are supported
        % you'll have to figure that out
end
fclose(fid);

% reshape the data
inpict = reshape(inpict,hdrinfo.DimSize);

% view one slice rescaled
imshow(inpict(:,:,59),[]);

Answer 2

[Shivansh]

Hi mohd,

Please refer to the following related MATLAB Answers question: https://www.mathworks.com/matlabcentral/answers/1776645-read-medical-images-mhd-and-raw-format.

I hope it resolves your query!