QT dcmtk转换dicom多帧图的每一帧到QImage

您可以使用DCMTK库中的`DcmFileFormat`和`DcmPixelData`类来将DICOM多帧图像的每一帧转换为QImage。下面是一个示例代码：

#include <dcmfile.h>
#include <dcmimgle/dcmimage.h>
#include <QImage>

QImage convertDicomFrameToQImage(const char* dicomFilePath, int frameIndex)
{
    DcmFileFormat fileFormat;
    if (fileFormat.loadFile(dicomFilePath).good())
    {
        DcmDataset* dataset = fileFormat.getDataset();
        DcmPixelData* pixelData = NULL;
        if (dataset->findAndGetSequenceItem(DcmTagKey(0x7fe0, 0x0010), pixelData, frameIndex).good())
        {
            DcmPixelSequence* pixelSequence = NULL;
            if (pixelData->getEncapsulatedRepresentation(pixelSequence).good())
            {
                DcmPixelItem* pixelItem = NULL;
                if (pixelSequence->getItem(pixelItem, 0).good())
                {
                    Uint8* pixelDataArray = NULL;
                    if (pixelItem->getUint8Array(pixelDataArray).good())
                    {
                        DcmUnsignedShort imageWidth(DCM_Columns);
                        DcmUnsignedShort imageHeight(DCM_Rows);
                        dataset->findAndGetUint16(DCM_Columns, imageWidth);
                        dataset->findAndGetUint16(DCM_Rows, imageHeight);

                        DicomImage dicomImage(pixelData->getTransferredData(), pixelData->getOriginalByteOrder(), pixelData->getLength());
                        QImage image(dicomImage.getWidth(), dicomImage.getHeight(), QImage::Format_RGB32);

                        QRgb* imgPixels = (QRgb*)image.bits();
                        const DiPixel* diPixels = dicomImage.getInterData();
                        for (unsigned int y = 0; y < dicomImage.getHeight(); ++y)
                        {
                            for (unsigned int x = 0; x < dicomImage.getWidth(); ++x)
                            {
                                unsigned short pixelValue = diPixels->getPixel(x, y);
                                imgPixels[y * dicomImage.getWidth() + x] = qRgb(pixelValue, pixelValue, pixelValue);
                            }
                        }

                        return image;
                    }
                }
            }
        }
    }

    return QImage();
}

使用示例：

const char* dicomFilePath = "path/to/dicom.dcm";
int frameIndex = 0; // 要转换的帧索引，从0开始

QImage frameImage = convertDicomFrameToQImage(dicomFilePath, frameIndex);
if (!frameImage.isNull())
{
    // 在这里使用QImage对象
}
else
{
    // 转换失败，处理错误
}

请注意，此示例假设您已经正确设置了DCMTK库并将其与Qt项目一起使用。此外，还要根据DICOM文件中的实际标签和数据结构进行适当的调整。