ubuntu20.04 Qt6引用dcmtk库实现dicom文件读取和字符集转换

1 环境问题

安装完Qt6，新建Qt/QtQuick CMake工程编译出现如下错误:

Found package configuration file: Qt6Config.cmake but it set Qt6 FOUND to FALSE so package "Qt6" is considered to be NOT FOUND.

原因：

这是因为系统中缺少OpenGL库，可以安装libgl1-mesa-dev

解决方法：

sudo apt install libgl1-mesa-dev

项目编译成功后运行，如果出现如下错误：

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even through it was found.

sudo apt install libxcb-cursor*

2 引用dcmtk

由于作者使用cmake编译，所以需要使用CMakeLists添加第三方库的方式，来引用dcmtk库。

set(DCMTK_INC_DIR "/home/charles/workdir/software/dcmtk-3.6.8/dcmtk-3.6.8-release/include")
set(DCMTK_LIB_DIR "/home/charles/workdir/software/dcmtk-3.6.8/dcmtk-3.6.8-release/lib")
include_directories(${DCMTK_INC_DIR})
link_directories(${DCMTK_LIB_DIR})

target_link_libraries(dcmtk-test PUBLIC
    Qt${QT_VERSION_MAJOR}::Widgets
    ${DCMTK_LIB_DIR}/libdcmtk.so
)

3 测试程序

实现对dicom tag值的读取，以及字符集的转换。以支持中文或其他字符的显示

#include "mainwindow.h"
#include "./ui_mainwindow.h"
#include <dcmtk/dcmdata/dctk.h>
#include <dcmtk/ofstd/ofchrenc.h>

bool strEqual(const string s, const string s1)
{
    return (strcmp(s.c_str(), s1.c_str()) == 0);
}

//参考https://dicom.nema.org/medical/dicom/current/output/chtml/part18/chapter_D.html
string getCodeName(const string &Ch)
{
        if (strEqual(Ch, "GB18030"))
            return "GB18030";
        else if (strEqual(Ch, "ISO_IR 192"))
            return "UTF-8";
        else if (strEqual(Ch, "ISO_IR 100"))
            return "ISO-8859-1";
        else if (strEqual(Ch, "ISO_IR 101"))
            return "ISO-8859-2";
        else if (strEqual(Ch, "ISO_IR 109"))
            return "ISO-8859-3";
        else if (strEqual(Ch, "ISO_IR 110"))
            return "ISO-8859-4";
        else if (strEqual(Ch, "ISO_IR 144"))
            return "ISO-8859-5";
        else if (strEqual(Ch, "ISO_IR 127"))
            return "ISO-8859-6";
        else if (strEqual(Ch, "ISO_IR 126"))
             return "ISO-8859-7";
        else if (strEqual(Ch, "ISO_IR 138"))
           return "ISO-8859-8";
        else if (strEqual(Ch, "ISO_IR 148"))
           return "ISO-8859-9";
        else if (strEqual(Ch, "ISO_IR 203"))
            return "ISO-8859-15";
        else if (strEqual(Ch, "ISO_IR 166"))
            return "TIS-620";
        else if (strEqual(Ch, "ISO 2022 IR 13") || strEqual(Ch, "ISO 2022 IR 87"))
            return "ISO-2022-JP";
        else if (strEqual(Ch, "ISO 2022 IR 6")|| strEqual(Ch, "ISO 2022 IR 149"))
            return "ISO-2022-KR";
        else if (strEqual(Ch, "ISO 2022 IR 6")|| strEqual(Ch, "ISO 2022 IR 58"))
            return "ISO-2022-CN";
        else if (strEqual(Ch, "GBK"))
            return "GBK";
        else
            return "";
}

OFString toUTF8(OFString &curEncoding,OFString &valStr)
{
    OFCharacterEncoding encoding;
    OFCondition res = encoding.selectEncoding(getCodeName(curEncoding.c_str()).c_str(), OFString("UTF-8"));
    OFString toString("");
    res = encoding.convertString(valStr, toString);
    return toString;
}

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    loadDcm();

}

MainWindow::~MainWindow()
{
    delete ui;
}


void MainWindow::loadDcm()
{
    DcmFileFormat fileformat;
    OFCondition status = fileformat.loadFile("./test.dcm");
    if (status.good())
    {
        OFString str;
        OFString charset("GB18030");
        if (fileformat.getDataset()->findAndGetOFString(DCM_SpecificCharacterSet, str).good())
        {
            charset = str;
            ui->textEdit->append(QString::fromStdString(str.c_str()));
        }
        if (fileformat.getDataset()->findAndGetOFString(DCM_PatientName, str).good())
            ui->textEdit->append(QString::fromUtf8(toUTF8(charset,str).c_str()));
        if (fileformat.getDataset()->findAndGetOFString(DCM_PatientID, str).good())
            ui->textEdit->append(QString::fromUtf8(toUTF8(charset,str).c_str()));
        if (fileformat.getDataset()->findAndGetOFString(DCM_BodyPartExamined, str).good())
            ui->textEdit->append(QString::fromUtf8(toUTF8(charset,str).c_str()));
        if (fileformat.getDataset()->findAndGetOFString(DCM_PatientPosition, str).good())
            ui->textEdit->append(QString::fromUtf8(toUTF8(charset,str).c_str()));
    }
    else
        ui->textEdit->append("Bad file!");
}

执行效果如图：