Mason suffered a fractured skull and bleeding on the brain after a collision with Chelsea defender Gary Cahill in January.
The 26-year-old has recovered well from the serious injury but he will have to wait for a second CT scan before finding out when he can return to football.
Mason told 'Sky Sports': "I had a CT scan a month ago and it isn't quite there yet. We are going to repeat that scan in the near future and measure the rate of healing and go from there.
"Physically I am ready to go back in when it is safe and sensible.
"It's just a case of a bone healing now, there's no brain damage or anything like that. I am in a positive way."
The England international returned to non-contact training with his Hull team-mates during the summer but is not yet ready to take part in more physical training which could impede his recuperation.
When asked what the next stage of his recovery would be, Mason said: "Joining in with the boys, jumping for headers and being involved in that contact type of training.
"I feel fine, I wouldn't put myself in a position that could possibly be dangerous. I am just being patient, respecting my body and letting it heal.
"It was a dangerous collision but credit to the medical team that was there and acted so quickly that I am here now and in a physical condition to return to playing once the skull has healed."