Sydney Roosters players injured during home games will be able to get MRI and X-ray scans during a match to assess if they are fit to return to the field in a world-first sports medicine initiative.

In the past, players injured during the course of a match have had to wait hours or even days to assess the full extent of the damage.

But the opening of a new clinic at the SFS, The Stadium Orthopaedic and Sports Medicine Centre, will give club doctors all the facts before they decide whether to send a player back into the fray.

Never before have players been able to access MRI and X-ray facilities while a match was still in progress, said centre director Merv Cross, a leading orthopaedic surgeon.

"I don't know of anything like this and I've worked in the NFL and the [US]," Cross told The Sun-Herald.

"You can get it done straight away, you don't have to wait till some centre opens.

"That's why we put the clinic here."

MRI scan results can be available in about 25 minutes but X-rays take only five. It means that players injured early can go straight from the field to the clinic and then return to action, depending on the diagnosis.

The clinic is expected to be operational for the round-22 clash between the Roosters and Parramatta on Sunday.

"Opposition teams will be able to use it as well, but because it's our home ground we're rapt it will be available," Roosters doctor John Orchard said.

"If somebody gets injured they will be able to zoom on in and get their answer."