System information

434 DICOM Extension
Evaluating Data in Observer’s DICOM Extension
In order to be able to represent and evaluate a DICOM communication, the data must be
captured in Observer DICOM.
After you have captured the data, you will see either the DICOM Upper Layer Protocol
View or the DICOM Message View. You can toggle between these two views at any time
either in
Mode Commands or by using the button bar on the left edge of the screen.
Both of the views have a button bar (Mode Commands) on the left, a combined
navigation/information bar at the top, and three superimposed output windows with a
freely definable size.
You can toggle between the two views (DICOM Upper Layer Protocol View and DICOM
Message View) by clicking on the appropriate buttons in the button bar, which also
contains buttons for the other functions in the Mode Commands (see description of the
functions in the Observer DICOM window above).
The left part of the combined navigation/information bar contains icons for navigating
between the different packets (first packet, last packet, up/down 100 packets, up/down one
screen, up/down one packet). The right part shows the total number of packets available
for decoding, the IP source address, the IP destination address and the TCP ports used for
DICOM in your communication. Your current position in the communication packet
relative to the start (start = 0) is indicated on the far right.
The top output window contains a list of your communication packets, with details of the
packet number (Pkt), the communication direction (Direction), the packet type (Type),
additional information (Information) and the packet size in bytes (Size). The packet,
which is selected in the top output window (shown on a colored background), is displayed
in its decoded form in the middle window. Lines marked with a + can be expanded
(position the mouse pointer on the + and press the left mouse button), while lines marked
with a - cannot. The bottom output window contains a hexadecimal view of the packet,
which is selected in the top window. The bytes corresponding to the line that is selected in
the middle output window (colored background) are also highlighted in the bottom
window. The three output windows thus offer the following information for evaluation
(from top to bottom):
(top) DICOM packets
(middle) decoded DICOM information
(bottom) raw DICOM data
DICOM Data Dictionary Extensions
To extend the Data Dictionary, simply open the file <Observer-program-folder>\Data.dic
using any text editor, e.g., Notepad.exe.
Then enter your extensions in accordance with the following syntax:
TAG;DESCRIPTION;VALUE REPRESENTATION;VALUE Multiplicity