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c++ - 如何从 dicom 文件中读取二进制数据？

问题描述

如何从未压缩的 DICOM 文件中读取原始图像数据并将其转储到文件中。我只是将以下代码用于压缩文件。使用 dcmtk 库

dataSet->findAndGetElement(DCM_PixelData, element);
pixDataElem = OFstatic_cast(DcmPixelData*, element);

DcmPixelSequence *pixelSequence = NULL;
E_TransferSyntax tran_Syntax = EXS_Unknown;
const DcmRepresentationParameter *representation = NULL;

// Find the key that is needed to access the right representation of the data within DCMTK
pixDataElem->getOriginalRepresentationKey(tran_Syntax, representation);
//pixDataElem->getCurrentRepresentationKey(tran_Syntax, representation);

// Access original data representation and get result within pixel sequence
pixDataElem->getEncapsulatedRepresentation(tran_Syntax, representation, pixelSequence);


    DcmPixelItem *pixelItem = NULL;
    //Access the First frame by skipping the offset table...
    pixelSequence->getItem(pixelItem, 1);

    Uint8 *pixels = NULL;
    pixDataElem = (DcmPixelData*)pixelItem;
    pixDataElem->getUint8Array(pixels);
    Uint8 *pixels = NULL;
    pixDataElem->getUint8Array(pixels);
    //Writing the Raw data to a file...
    FILE *file;
    file = fopen("D:\\DicomImage.jpeg", "wb");
    fwrite(pixels, sizeof(char), imageSize, file);
    cout << "File write Completed and the File is closed Successfully" << endl;

如何使用 dcmtk 库从 C++ 中具有许多帧的未压缩文件中获取原始图像数据.....？

标签： c++dicomdcmtk

解决方案

基本上，您可以使用相同的代码，但无需压缩（这实际上是更简单的情况......）

dataSet->findAndGetElement(DCM_PixelData, element);
pixDataElem = OFstatic_cast(DcmPixelData*, element);

Uint8 *pixels = NULL;
pixDataElem->getUint8Array(pixels);

//Writing the Raw data to a file...
FILE *file;
file = fopen("D:\\DicomImage.raw", "wb");
// frameSize is the size of a single frame
fwrite(pixels + frameSize * frameIndex, sizeof(char), frameSize, file);
cout << "File write Completed and the File is closed Successfully" << endl;

（这不是我的想法，所以不能保证完整性）
你得到的是原始二进制数据。如果要从中创建像 JPG 这样的图像文件，则需要相应的图像功能，尽管这与 dcmtk 无关。

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