We are happy to announce the 5th biennial CryoEM 3D Image Analysis Symposium to be held at Granlibakken in March 2024. As in the past, the symposium provides a GRC-like atmosphere with a strong focus on technical aspects of algorithms for image processing in CryoEM. Participants are encouraged to discuss issues in depth, and long discussion sessions are scheduled for each talk. We also have a significant poster-talk session for cutting edge developments and discussion for those bringing new concepts into CryoEM. The meeting has been very well attended in the past with ~150 participants, a large fraction of whom are active methods developers in the field. We have been very successful in attracting a range of people from students and postdocs to senior faculty, and have had very good and in depth discussions on algorithms and methodologies in this field.

The topics for this year's symposium are:

• 3D Heterogeneity
• Protocols for automation; from correlative LM to Aquilos and beyond
• AI Deep Learning
• Data Validation, model building and model quality
• Feature Annotation and Segmentation in-situ, and identifications of proteins from volume
• Round Table on data archiving and public data repository policies

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