Ty Lawson scored a career-high 26 points, and Hansbrough had 20 points and 11 rebounds before leaving when he hit his head in North Carolina's 93-71 victory against Rutgers.
Hansbrough, the preseason national player of the year, tried to take a charge from Earl Pettis with 5:47 to play and the Tar Heels leading by 23 points.
Hansbrough went to the floor in a sitting position and then hit the back his head against the knee of a television cameraman and then the bottom of the basket support. He stayed down on the floor for a couple of minutes before being helped up by coach Roy Williams and the trainer and being taken to the locker room. Hansbrough didn't return.