I have the following problem: we conducted an event-related fMRI experiment using Presentation software to display the experiment. Usually each fMRI pulse/scan is logged in the presentation log file so the times for event-related analysis can be derived later on. Unfortunately, for about half of the subjects these triggers in the log files are missing, so I don't know when the experimental events occurred relative to the first scan.
Do you have any ideas how I might still try to analyze that part of the data? All suggestions are welcome.