Kelley Korbin, manager of media relations for the Canadian Freestyle Ski Association, said a CAT scan was normal but d'Artois continues to experience concussion symptoms. The Whistler, B.C., skier will remain in the hospital, likely overnight, until he feels better. D'Artois' father is with him at the hospital.
D'Artois fell near the top of the 22-foot superpipe and slid to the bottom unconscious.
Ski patrol immediately was on the scene and attended to him for about 20 minutes before taking him off in a sled. He was wearing a neck brace but flashed a "rock on" sign with his right hand as he left the venue.
Five of the 12 men in the finals fell Saturday. France's Benoit Valentin appeared to injure his left knee.
American David Wise won the event.
Canadian freestyle pioneer Sarah Burke crashed on the same halfpipe last year while training and died a week later from the injuries.
The dangers of winter action sports came into focus again this week when freestyle snowmobile rider Caleb Moore died after a crash at the Winter X Games.
Korbin said Burke's death likely was a big reason for the extra precaution.
"I'm sure that played a factor in taking it very seriously," Korbin said. "It wasn't overreaction but heroic measures. That's appreciated."
She said the team also had no problem with the Park City halfpipe.
"I heard the pipe was in fantastic condition today," Korbin said. "It wasn't anything to do with that. We have absolutely no concerns about the condition of the pipe or manner in which Park City treated his injury. It was commendable."
The skiers competing also had no complaints about the halfpipe, though they acknowledged the walls are more vertical than others.
"It's just the way it was cut," said American Torin Yater-Wallace, who finished second Saturday in the men's event behind teammate Wise. "They gave it a lot of vert, almost a little more than 90-degrees, so you've got to absorb when you go over the lip so you don't land too far in the flat."
He said he changed his second run after seeing the crash, downgrading to a double.
"Personally, I don't like to watch everybody's run, it kind of scares me," said Wallace. "Obviously, when you see something like that, when somebody hits their head pretty hard, it's pretty, like, mind-boggling, and makes you think. But then you have to go do your run and get into competitive mode."