Two of them were negative, on 2/25 and 2/27. Code Blue Blog discussed this at length, with Doc CBB concluding that the head trauma, whatever it was, necessarily occurred after she got to the hospital. Another CT, ?March 30?, turned sharply abnormal. Clearly we have another mystery! (My comments from memory so don't hold me to the exact dates. Read the doc's own account.)
This by no means rules out other trauma at the time of Terri's "incident" 2/25.
"turned sharply abnormal. Clearly we have another mystery!"
Another commentor, a doc if I recall correctly, stated that her scans made sense. When a brain is starved for oxygen it doesn't show up immediately...the cells aren't just poof gone, but over a period of time as the cells begin to die off they begin to show.
There needs to be sufficient numbers to show on the scan.
Made sense to me. :-)