Block E is reserved for the afternoon symposia. In general, Tracks 1 and 2 have been assigned to diagnostic, and Tracks 4 and 5 have been assigned to therapy sessions. Track 3 is used for overflow from other tracks, Track 6 has been assigned to ultrasound sessions and Track 7 has been assigned to nuclear medicine. An effort was made to keep the room the same for each track, but there is an occasional exception. Poster and Paper sessions are laid out spatially, not temporally like the oral presentations.
Poster have a PO instead of the day, and papers have a PA instead of the day.
Similarly, EP stands for Electronic Posters. A complete description for Posters and Papers layout is given in the exhibit hall in the designated poster area. The organization of the abstracts numbering was meant to improve the efficiency of finding one's way around the meeting. This will only be true if the attendees are aware of the rationale for and how to use the numbering scheme.