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#include "vtkDICOMMetaData.h"
#include "vtkDICOMFileSorter.h"
#include "vtkDICOMReader.h"
#include "vtkDICOMTagPath.h"
#include "vtkDICOMSequence.h"
#include "vtkDICOMItem.h"
#include "vtkSmartPointer.h"
#include "vtkStringArray.h"
#include <sstream>
#include <string.h>
#include <stdlib.h>
#include <math.h>
// macro for performing tests
#define TestAssert(t) \
if (!(t)) \
{ \
cout << exename << ": Assertion Failed: " << #t << "\n"; \
cout << __FILE__ << ":" << __LINE__ << "\n"; \
cout.flush(); \
rval |= 1; \
}
int main(int argc, char *argv[])
{
int rval = 0;
const char *exename = argv[0];
// remove path portion of exename
const char *cp = exename + strlen(exename);
while (cp != exename && cp[-1] != '\\' && cp[-1] != '/') { --cp; }
exename = cp;
vtkSmartPointer<vtkDICOMFileSorter> sorter =
vtkSmartPointer<vtkDICOMFileSorter>::New();
vtkSmartPointer<vtkStringArray> files =
vtkSmartPointer<vtkStringArray>::New();
for (int i = 1; i < argc; i++)
{
files->InsertNextValue(argv[i]);
}
sorter->SetInputFileNames(files);
sorter->Update();
vtkSmartPointer<vtkDICOMMetaData> meta =
vtkSmartPointer<vtkDICOMMetaData>::New();
if (sorter->GetNumberOfSeries() > 0)
{
// read the meta data from the supplied image
vtkStringArray *a = sorter->GetFileNamesForSeries(0);
vtkSmartPointer<vtkDICOMReader> reader =
vtkSmartPointer<vtkDICOMReader>::New();
reader->SetFileNames(a);
reader->UpdateInformation();
meta = reader->GetMetaData();
}
else if (argc == 1)
{
// create a real world value mapping sequence by hand
// 1) use Unified Code for Units of Measure (UCUM), version 1.9
// 2) the CodeMeaning should be a copy of CodeValue unless:
// 2a) CodeValue=1, in which case use CodeMeaning=unity
vtkDICOMItem unitsItem;
unitsItem.Set(DC::CodeValue, "m2/s");
unitsItem.Set(DC::CodingSchemeDesignator, "UCUM");
unitsItem.Set(DC::CodingSchemeVersion, "1.9");
unitsItem.Set(DC::CodeMeaning, "m2/s");
vtkDICOMItem mappingItem;
mappingItem.Set(DC::LUTExplanation, "Hot Metal");
mappingItem.Set(DC::MeasurementUnitsCodeSequence,
vtkDICOMValue(vtkDICOMVR::SQ, unitsItem));
mappingItem.Set(DC::LUTLabel, "HOT_METAL");
// need to explicitly define the VR for these, because it depends
// on whether the PixelRepresentation is signed or unsigned
mappingItem.Set(DC::RealWorldValueFirstValueMapped,
vtkDICOMValue(vtkDICOMVR::US, 0));
mappingItem.Set(DC::RealWorldValueLastValueMapped,
vtkDICOMValue(vtkDICOMVR::US, 4095));
mappingItem.Set(DC::RealWorldValueIntercept, 0.234);
mappingItem.Set(DC::RealWorldValueSlope, 0.438);
meta->Set(DC::RealWorldValueMappingSequence,
vtkDICOMValue(vtkDICOMVR::SQ, mappingItem));
}
else
{
cout << "The provided file is not DICOM!" << endl;
}
if (meta->Has(DC::RealWorldValueMappingSequence))
{
const vtkDICOMItem& mappingItem =
meta->Get(DC::RealWorldValueMappingSequence).GetItem(0);
std::string lutName = mappingItem.Get(DC::LUTLabel).AsString();
std::string units = mappingItem.Get(vtkDICOMTagPath(
DC::MeasurementUnitsCodeSequence, 0, DC::CodeValue)).AsString();
double range[2];
range[0] = mappingItem.Get(DC::RealWorldValueFirstValueMapped).AsDouble();
range[1] = mappingItem.Get(DC::RealWorldValueLastValueMapped).AsDouble();
double slope = mappingItem.Get(DC::RealWorldValueSlope).AsDouble();
double inter = mappingItem.Get(DC::RealWorldValueIntercept).AsDouble();
cout << "Map pixel values in the range " << range[0] << ", " << range[1] << endl;
cout << "through the equation y = " << slope << " * x + " << inter << endl;
cout << "to real values with units of " << units << endl;
cout << "and display the result with color table " << lutName << endl;
if (argc == 1)
{
TestAssert(range[0] == 0);
TestAssert(range[1] == 4095);
TestAssert(fabs(slope - 0.438) < 1e-16);
TestAssert(fabs(inter - 0.234) < 1e-16);
TestAssert(units == "m2/s");
TestAssert(lutName == "HOT_METAL");
}
}
else
{
cout << "Image has no real world value mapping!" << endl;
}
return rval;
}
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