Does the DICOM file header gets lost when transferred over the network?


I am currently investigating the PEDICOM vulnerability CVE-2019-11687 where I am trying to reassemble the P-DATA DICOM fragments from a PCAP. Since the vulnerability takes advantage of writing bytes onto the header, I want to investigate this. When sniffing the network and trying to capture and reassemble the file, when sent over the network using the DICOM protocol does it loose its header and the only information is sent are the different data elements?