DCMTK简介三-dcmdata程序库

medimage

三、dcmdata程序库

-dcmdata:一个数据编码/解码库和可用的工具

这个模块包含了一些类来管理Dicom数据结构和文件。同时它也提供了对DICOMDIR文件的支持以满足Dicom storage media（存储介质）的需要。

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主要的接口类有：

--DcmFileFormat：a class handling the DICOM file format (with meta header) 。头文件在dcfilefo.h。***详情在单独的文档中分析***

--DcmDataset：a class handling the DICOM dataset format (files without meta header) 。头文件在dcdatset.h。***详情在单独的文档中分析***

--DcmItem：a class representing a collection of DICOM elements。头文件在dcitem.h。***详情在单独的文档中分析***

--DcmElement：abstract base class for all DICOM elements。头文件在dcelem.h。***详情在单独的文档中分析***。它的派生类包括：DcmAttributeTag\DcmByteString\DcmFloatingPointDouble\DcmFloatingPointSingle\DcmOtherByteOtherWord\DcmSequenceOfItems\DcmSignedLong\DcmSignedShort\DcmUnsignedLong\DcmUnsignedShort

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工具：这个模块包含了下面的命令行工具：

dcm2xml: Convert DICOM file and data set to XML

dcmconv: Convert DICOM file encoding

dcmcrle: Encode DICOM file to RLE transfer syntax

dcmdrle: Decode RLE-compressed DICOM file

dcmdump: Dump DICOM file and data set

dcmftest: Test if file uses DICOM part 10 format

dcmgpdir: Create a general purpose DICOMDIR

dcmodify: Modify DICOM files

dump2dcm: Convert ASCII dump to DICOM file

xml2dcm: Convert XML document to DICOM file or data set

***暂时不对命令行工具进行详细的分析***

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举例:

--调入一个DICOM文件，输出病人姓名

DcmFileFormat fileformat;

OFCondition status = fileformat.loadFile("test.dcm");

if (status.good())

{

OFString patientsName;

if (fileformat.getDataset()->findAndGetOFString(DCM_PatientsName, patientsName).good())

{

    cout << "Patient's Name: " << patientsName << endl;

} else

    cerr << "Error: cannot access Patient's Name!" << endl;

} else

cerr << "Error: cannot read DICOM file (" << status.text() << ")" << endl;

--创建一个DICOM dataset数据集，并保存为文件

char uid[100];

DcmFileFormat fileformat;

DcmDataset *dataset = fileformat.getDataset();

dataset->putAndInsertString(DCM_SOPClassUID, UID_SecondaryCaptureImageStorage);

dataset->putAndInsertString(DCM_SOPInstanceUID, dcmGenerateUniqueIdentifier(uid, SITE_INSTANCE_UID_ROOT));

dataset->putAndInsertString(DCM_PatientsName, "Doe^John");

/* ... */

dataset->putAndInsertUint8Array(DCM_PixelData, pixelData, pixelLength);

OFCondition status = fileformat.saveFile("test.dcm", EXS_LittleEndianExplicit);

if (status.bad())

cerr << "Error: cannot write DICOM file (" << status.text() << ")" << endl;

--如何为多个文件创建一般目的的DICOMDIR

DicomDirInterface dicomdir;

OFCondition status = dicomdir.createNewDicomDir();

if (status.good())

{

while ( /* there are files */ )

    dicomdir.addDicomFile( /* current filename */ );

status = dicomdir.writeDicomDir();

if (status.bad())

    cerr << "Error: cannot write DICOMDIR (" << status.text() << ")" << endl;

} else

cerr << "Error: cannot create DICOMDIR (" << status.text() << ")" << endl;

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