Twitter at RSNA 2010
The results for RSNA 2010 are in, and the level of Twitter activity was significantly higher than last year. There were 394 different users who used the #RSNA10 hash tag, up from 163 in 2009. Collectively, they sent out 1818 messages, which was easily double the amount of messages sent out during the previous year’s conference (2009: 857 tweets).
Interestingly, the level of social engagement was up this year over last. Using the number of retweets and replies as a measure of message amplification and person-to-person interaction, respectively, 2010 showed significant improvement. Retweets accounted for 24% of the total traffic versus 16% in 2009. Replies were up to 19% versus 11% in 2009.
These results suggest that the Twitter audience is growing at RSNA, and that audience is becoming more engaged in this form of social media.
Figure 1: Analysis of tweets containing the #RSNA10 hash tag, decomposed into tweets, re-tweets, and replies.
Figure 2: Top 15 tweeters (left), re-tweeters (middle) and repliers (right). Analysis of all tweets containing the #RSNA10 hash tag.

