we would like to invite you to participate in the Cardiac Delayed Enhancement MRI Segmentation (cDEMRIS) challenge workshop that will take place at ISBI 2012 in Barcelona, Spain. The challenge focuses on the segmentation of fibrosis/scar from left atrial DE-MRI of patients with atrial fibrillation. 60 clinical data sets are available for download. Full details are given in the PDF Call for participation. Dates: Data available - now Submission of results - March 16th 2012 Notification of acceptance - March 30th 2012 Submission of abstract - April 15th 2012 Workshop - May 2nd 2012 More information can be found at http://www.isd.kcl.ac.uk/cdemris/ Kawal Rhode & Rashed Karim, KCL, London, UK Rob MacLeod & Josh Cates, University of Utah, USA Dana Peters, Yale University, CT, USA