Added dicom preamble to dicom pdf.

dicom_sr_to_pdf.py

@@ -1,6 +1,6 @@
 import pydicom
-from pydicom.dataset import Dataset
-from pydicom.dataset import FileMetaDataset
+from pydicom.dataset import Dataset, FileMetaDataset
+from pydicom.sequence import Sequence
 from pydicom.uid import MediaStorageDirectoryStorage, EncapsulatedPDFStorage, generate_uid
 import matplotlib
 matplotlib.use("Agg")  # Use non-GUI backend to avoid Tkinter issues
@@ -138,24 +138,30 @@ def create_dcm_pdf(sr, pdf_path, instance_uid):
     ds.AcquisitionDateTime = ""
     ds.InstanceNumber = 1
     ds.BurnedInAnnotation = "YES"
-    ds.DocumentTitle = ""
+    ds.ConceptNameCodeSequence = Sequence([])
+    ds.DocumentTitle = "Mammography Report"
     ds.EncapsulatedDocument = pdf_data
     ds.MIMETypeOfEncapsulatedDocument = "application/pdf"
 
     # Create a FileMetaDataset for DICOM file meta information
     file_meta = FileMetaDataset()
+    file_meta.FileMetaInformationVersion = b'\x00\x01'
     file_meta.MediaStorageSOPClassUID = EncapsulatedPDFStorage
     file_meta.MediaStorageSOPInstanceUID = ds.SOPInstanceUID
     file_meta.TransferSyntaxUID = pydicom.uid.ImplicitVRLittleEndian
+    file_meta.ImplementationClassUID = pydicom.uid.PYDICOM_IMPLEMENTATION_UID
+    file_meta.ImplementationVersionName = "pydicom-2.4.4"
     file_meta.FileMetaInformationGroupLength = 0
 
     # Assign the file meta information to the dataset
     ds.file_meta = file_meta
-
-    # Ensure preamble and "DICM" prefix is included
+    
     ds.is_implicit_VR = True  # Set to explicit VR
     ds.is_little_endian = True  # Set to little endian
     
+    # Ensure preamble and "DICM" prefix is included
+    ds.preamble = b'\x00' * 128  # 128 bytes of zero padding
+    
     return ds