继续手搓DICOM文件解析 （2）

继续手搓DICOM文件解析 （2）
书接上回，我们使用了简单的函数进行了DICOM文件的解析，那么我们就继续吧。

// to be continued (part 2)
    std::cout<<std::string(25,'%')<<" Part 2 continued "<<std::string(25,'%')<<std::endl;
    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));```
    以上，就是重复使用读取TAG函数，读取VR函数，然后使用getShort函数来读取数据的长度。还好很多数据都是字符串形式，可以使用readString函数来读取，下面是读取的结果。
    
```cpp
%%%%%%%%%%%%%%%%%%%%%%%%% Part 2 continued %%%%%%%%%%%%%%%%%%%%%%%%%
[0008,0005] :  CS 10 # ISO_IR 100
[0008,0008] :  CS 24 # DERIVED\SECONDARY\AXIAL 
[0008,0012] :  DA 8 # 20180828
[0008,0013] :  TM 14 # 145109.969000 
[0008,0016] :  UI 26 # 1.2.840.10008.5.1.4.1.1.2
[0008,0018] :  UI 54 # 1.2.276.0.20.1.4.5.964244510648.1152.1535439069.968750
[0008,0020] :  DA 8 # 20160113
[0008,0023] :  DA 8 # 20180828
[0008,0030] :  TM 0 # 
[0008,0033] :  TM 14 # 145109.969000 
[0008,0050] :  SH 0 # 
[0008,0060] :  CS 2 # CT
[0008,0070] :  LO 8 # BrainLAB
[0008,ff90] :  PN 0 # 
[0008,1010] :  SH 14 # RTWORKSTATION2
[0008,1030] :  LO 20 # RT^1_RT_Head (Adult)
[0009,0010] :  LO 20 # BrainLAB_Conversion 
[0009,1001] :  LO 24 # ARIA/Varis/OBI-Platform 
[0010,0010] :  PN 14 # Zheng^Mingtang
[0010,0020] :  LO 10 # 0000246783
[0010,0030] :  DA 8 # 19410113
[0010,0040] :  CS 2 # F 
[0018,0050] :  DS 16 # 2.9925389620816 
[0018,0060] :  DS 0 # 
[0018,1020] :  LO 6 # 4.1.4 
[0018,5100] :  CS 4 # HFS 
[0020,000d] :  UI 54 # 1.2.276.0.20.1.2.5.964244510648.3588.1451978243.765625
[0020,000e] :  UI 54 # 1.2.276.0.20.1.3.5.964244510648.1152.1535439069.765625
[0020,0010] :  SH 2 # 1 
[0020,0011] :  IS 2 # 2 
[0020,0012] :  IS 0 # 
[0020,0013] :  IS 2 # 50
[0020,0032] :  DS 50 # -259.15500957601\-184.74776528391\87.274973824935 
[0020,0037] :  DS 16 # 1\-0\-0\-0\1\-0 
[0020,0052] :  UI 56 # 1.2.276.0.20.1.30.5.964244510648.1152.1535439069.781250
[0020,1040] :  LO 0 # 

接下来我们会发现VR的数值变成US类型，此时就需要使用getShort函数来读取数值了，因为该数值是unsigned short 类型。需要注意到是小端字节序，读取之后自己进行拼接。代码如下：

std::cout<<"-------------[0028,0002]------------ "<<std::endl;
    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    unsigned short usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    std::cout<<"-----------[0028,0100]----------"<<std::endl;
    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    usvar=getShort(file);
    std::cout<<usvar<<std::endl;
    //std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    length=getShort(file);
    std::cout<<length<<" # ";
    readString(file,str,length);
    std::cout<<std::string(str)<<std::endl;
    std::memset(str,0,sizeof(str));

    readTag(file);
    read2Byte(file);
    long len=getLong(file);
    std::cout<<len<<" # ";

然后输出的结果如下：

-------------[0028,0002]------------ 
[0028,0002] :  US 2 # 1
[0028,0004] :  CS 12 # MONOCHROME2 
[0028,0010] :  US 2 # 512
[0028,0011] :  US 2 # 512
[0028,0030] :  DS 20 # 0.9765625\0.9765625 
-----------[0028,0100]----------
[0028,0100] :  US 2 # 16
[0028,0101] :  US 2 # 16
[0028,0102] :  US 2 # 15
[0028,0103] :  US 2 # 0
[0028,1050] :  DS 2 # 35
[0028,1051] :  DS 2 # 80
[0028,1052] :  DS 6 # -1024 
[0028,1053] :  DS 2 # 1 
[ffe0,0010] :  OW 8 #

是不是差不多了，我们可以看到数据是的行和列都是512，数据是16位数据，但是大家看到没有，最后的图像数据，TAG是【ffe0，0010】，实际上，使用DCMTK解析应该是7fe0，0010我也不知道哪里出错了，而且我也没有解析出数据的长度。OW是对的，到nema主页去查询，这个与传输与法有关联。我还在摸索中，等待下一期的结果吧，谢谢大家！如果有哪位专业人士指导原因，也可以评论区或者私信指点一下，非常感谢！

原文地址：https://blog.csdn.net/kangdehua/article/details/142719496

免责声明：本站文章内容转载自网络资源，如本站内容侵犯了原著者的合法权益，可联系本站删除。更多内容请关注自学内容网（zxcms.com）！