[英]How to replace the Pixel Data of DICOM file using fo-DICOM?
I want to replace the pixel data of a DICOM file with another one.我想用另一个替换 DICOM 文件的像素数据。 I used this code:我使用了这个代码:
public bool ImportImage(string imageFile, string newFilePah, string oldDicomFile)
{
try
{
Bitmap bitmap = new Bitmap(imageFile);
bitmap = GetValidImage(bitmap);
int rows, columns;
byte[] pixels = GetPixels(bitmap, out rows, out columns);
MemoryByteBuffer buffer = new MemoryByteBuffer(pixels);
DicomDataset dataset = new DicomDataset();
var df = DicomFile.Open(oldDicomFile);
FillDataset(ref dataset, df);
DicomTransferSyntax dicomTransfer = df.Dataset.Get<DicomTransferSyntax>(DicomTag.TransferSyntaxUID, DicomTransferSyntax.JPEGProcess14);
dataset.AddOrUpdate(DicomTag.PhotometricInterpretation, PhotometricInterpretation.Rgb.Value);
dataset.AddOrUpdate(DicomTag.Rows, (ushort)rows);
dataset.AddOrUpdate(DicomTag.Columns, (ushort)columns);
dataset.AddOrUpdate(DicomTag.BitsAllocated, (ushort)8);
DicomPixelData pixelData = DicomPixelData.Create(dataset, true);
pixelData.BitsStored = 8;
pixelData.SamplesPerPixel = 3;
pixelData.HighBit = 7;
pixelData.PixelRepresentation = 0;
pixelData.PlanarConfiguration = 0;
pixelData.AddFrame(buffer);
DicomFile dicomfile = new DicomFile(dataset.Clone(dicomTransfer));
dicomfile.Save(newFilePah);
return true;
}
catch(Exception ddd) { return false; }
}
private void FillDataset(ref DicomDataset dataset, DicomFile df)
{
foreach(var item in df.Dataset)
{
if(!item.Tag.Group.ToString().Equals("7FE0") && !item.Tag.Group.ToString().Equals("40"))
dataset.Add(item);
}
}
The output DICOM file loses many tags which affect image display.输出 DICOM 文件丢失了许多影响图像显示的标签。
I referred to this answer.我参考了这个答案。 But the AddOrUpdatePixelData
method used in that answer is deprecated in version v4.0.0-rc1 that I am using.但是在我使用的版本 v4.0.0-rc1 中不推荐使用该答案中使用的AddOrUpdatePixelData
方法。 So that answer does not help me.所以这个答案对我没有帮助。
Is there any other way to change the pixel data of a DICOM file using fo-DICOM?有没有其他方法可以使用 fo-DICOM 更改 DICOM 文件的像素数据?
Following code does replace the pixel data correctly.以下代码确实正确替换了像素数据。
public static bool ImportImage(string imageFile, string newFilePah, string oldDicomFile)
{
Bitmap bitmap = new Bitmap(imageFile);
int rows, columns;
byte[] pixels = GetPixels(bitmap, out rows, out columns);
MemoryByteBuffer buffer = new MemoryByteBuffer(pixels);
DicomDataset dataset = new DicomDataset();
var dicomfile = DicomFile.Open(oldDicomFile);
dataset = dicomfile.Dataset.Clone();
dataset.AddOrUpdate(DicomTag.PhotometricInterpretation, PhotometricInterpretation.Rgb.Value);
dataset.AddOrUpdate(DicomTag.Rows, (ushort)rows);
dataset.AddOrUpdate(DicomTag.Columns, (ushort)columns);
dataset.AddOrUpdate(DicomTag.BitsAllocated, (ushort)8);
DicomPixelData pixelData = DicomPixelData.Create(dataset, true);
pixelData.BitsStored = 8;
pixelData.SamplesPerPixel = 3;
pixelData.HighBit = 7;
pixelData.PhotometricInterpretation = PhotometricInterpretation.Rgb;
pixelData.PixelRepresentation = 0;
pixelData.PlanarConfiguration = 0;
pixelData.Height = (ushort)rows;
pixelData.Width = (ushort)columns;
pixelData.AddFrame(buffer);
dicomfile = new DicomFile(dataset);
dicomfile.Save(newFilePah);
return true;
}
private static byte[] GetPixels(Bitmap bitmap, out int rows, out int columns)
{
using(var stream = new MemoryStream())
{
bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
rows = bitmap.Height;
columns = bitmap.Width;
return stream.ToArray();
}
}
You can see I have cleaned up your code much.你可以看到我已经清理了很多你的代码。
But the major change is using System.Drawing.Imaging.ImageFormat.Bmp
instead of other formats.但主要的变化是使用System.Drawing.Imaging.ImageFormat.Bmp
而不是其他格式。 This depends on actual input image format.这取决于实际的输入图像格式。 Use the format as that of input image.使用格式作为输入图像的格式。
For detailed insight, please refer to this source code on github.更详细的见解,请参考github上的这个源代码。
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