Preliminary medical news on Mickael Pietrus looks great:

Celtics' Mickael Pietrus 'lucky man' - Chris Forsberg - ESPN Boston

Initial tests performed Friday night on Boston Celtics guard Mickael Pietrus suggest he escaped serious head injury.

Pietrus' agent, William McCandless, said Saturday that he was informed the X-ray and CT scans administered Friday night revealed no abnormalities, though Pietrus might have a concussion. Although Pietrus will undergo more tests and is still waiting for conclusive results from an MRI, there's optimism that he will indeed return to the court this season. ...

"He was a very lucky man," said McCandless, who spoke with Pietrus and said the player's first question to an assistant at McCandless' agency was who won the game.

Update: Pietrus: injury 'could have been worse' - A. Sherrod Blakely - Celtics Insider

In the interview with CSNNE.com, Pietrus says doctors have diagnosed him with a concussion.

That means he'll have to pass a battery of tests before he will be allowed to return to the court.

Pietrus isn't expected to play Sunday against Washington, and is doubtful for Monday's game at Charlotte.

"I still have some dizziness, and feel weak," he said. "But I know it could have been a lot worse."