如何压缩DICOM文件

DicomEngine.Startup();
using (DicomDataSet ds = new DicomDataSet())
{
   //Load DICOM File 
   ds.Load(input, DicomDataSetLoadFlags.None);

   //Initialize J2K Options
   DicomJpeg2000Options options = ds.DefaultJpeg2000Options;

   //Set Options
   options.CompressionControl = DicomJpeg2000CompressionControl.Ratio;
   options.CompressionRatio = 50;

   //Add options to the dataset
   ds.Jpeg2000Options = options;

   //Change the transfer syntax to J22K
   ds.ChangeTransferSyntax(DicomUidType.JPEG2000, 2, ChangeTransferSyntaxFlags.MinimizeJpegSize);

   //Save Dicom file
   ds.Save(dest, DicomDataSetSaveFlags.None);

   //Shut down the DICOM engine
   DicomEngine.Shutdown();
}