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R8218/CT/private/dicom_prep_MRMultiFrame.m
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dicom_prep_MRMultiFrame.m
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function metadata = dicom_prep_MRMultiFrame(metadata, X, txfr, dictionary)
%DICOM_PREP_MRMULTIFRAME Set multi-frame frame pointer, etc.
%
% See PS 3.3 Sec C.8.13.6
% Copyright 2010 The MathWorks, Inc.
% Make sure that the Shared Functional Groups Sequnece and
% Per-frame Functional Groups Sequence attributes are provided.
% We can't make these values out of whole cloth.
if (~isfield(metadata, dicom_name_lookup('5200','9229', dictionary)))
error(message('images:dicom_prep_MRMultiFrame:missingSharedSequence', dicom_name_lookup( '5200', '9229', dictionary )))
elseif (~isfield(metadata, dicom_name_lookup('5200','9230', dictionary)))
error(message('images:dicom_prep_MRMultiFrame:missingPerFrameSequence', dicom_name_lookup( '5200', '9230', dictionary )))
elseif (~isfield(metadata, dicom_name_lookup('0008','0008', dictionary)))
error(message('images:dicom_prep_MRMultiFrame:missingImageType', dicom_name_lookup( '0008', '0008', dictionary )))
end
numFrames = size(X,4);
% MultiFrame - C.7.6.6
if (numFrames > 1)
metadata.(dicom_name_lookup('0028', '0008', dictionary)) = size(X,4);
end
% Make sure that (0028,0009) has a value.
framePointerName = dicom_name_lookup('0028', '0009', dictionary);
if (~isfield(metadata, framePointerName))
% To Do. Fill this.
end
% Fill what values we can invent if they're missing.
if (~isfield(metadata, dicom_name_lookup('0020','0013', dictionary))) % Instance number
metadata.(dicom_name_lookup('0020','0013', dictionary)) = '1';
end
when = now;
if (~isfield(metadata, dicom_name_lookup('0008','0023', dictionary))) % Content date
metadata.(dicom_name_lookup('0008','0023', dictionary)) = datestr(when, 'yyyymmdd');
end
if (~isfield(metadata, dicom_name_lookup('0008','0033', dictionary))) % Content time
metadata.(dicom_name_lookup('0008','0033', dictionary)) = datestr(when, 'HHMMSS');
end
details = dicom_uid_decode(txfr);
if (hasLossyCompression(details, metadata, dictionary))
metadata.(dicom_name_lookup('0028','2110', dictionary)) = '01';
metadata.(dicom_name_lookup('0028','2114', dictionary)) = details.CompressionType;
else
metadata.(dicom_name_lookup('0028','2110', dictionary)) = '00';
end
if (isequal(metadata.(dicom_name_lookup('0028','0004', dictionary)), ...
'MONOCHROME2'))
metadata.(dicom_name_lookup('2050', '0020', dictionary)) = 'IDENTITY';
end
function tf = hasLossyCompression(details, metadata, dictionary)
lossyAttrName = dicom_name_lookup('0028','2110', dictionary);
if (details.LossyCompression)
% This compression will be lossy.
tf = true;
elseif (isfield(metadata, lossyAttrName))
% Lossy-ness can't be shaken. It has to be passed along.
tf = isequal(metadata.(lossyAttrName), '01');
else
tf = false;
end
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