Users can also “reply” to others' posts to start a conversation on the topic. In large meetings where many tweets are posted, each session may be assigned a specific hashtag so that people can follow the streams related to their session of interest and post questions to presenters and moderators. These make it easy for attendees to have a glance at the latest posts during scheduled breaks or as they walk from one session to another. In many professional meetings currently, hallways and foyers are equipped with large screens displaying all meeting-related tweets posted from inside or outside the venue. Many specialty meeting organizers now publish a meeting-specific hashtag such as #ASNR14 used at the 52nd annual meeting of the American Society of Neuroradiology (ASNR). Given the 140-character limit for each tweet, brief or abbreviated hashtags are usually favored. Twitter users can embed metadata “tags” in their posts to make them searchable by using hashtags, a word or acronym preceded by the # character.
ASNR14 indicates American Society of Neuroradiology, May 17–22, 2014, Montréal, Quebec, Canada AUR14, Association of University Radiologists, April 1–4, 2014, Baltimore, Maryland ISMRM14, International Society for Magnetic Resonance in Medicine, May 10–16, 2014, Milan, Italy ECR2014, European Congress of Radiology, March 6–10, 2014, Vienna, Austria RSNA13, Radiological Society of North America, November 30–December 5, 2013, Chicago, Illinois. Of note, some of the tweets related to each meeting were posted by microbloggers who were not attending the venue. The difference in the number of tweets or microbloggers among different radiology societal meetings is at least in part related to the difference in the number of attendees. Average number of tweets per day and total number of microbloggers for the duration of conferences at some most recent societal conferences in radiology.
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