"I had an X-ray on Tuesday and it is positive. The bone is starting to calcify over and that is all I need to see - that we are moving forward," Cahill told the club's website.
"It is pretty much up to Baz (head physio Mick Rathbone) to give me the all clear, but on Thursday afternoon I will be running and for me it is amazing because I feel like I have come a long way.
"In my head I am ready and set. I have done everything possible to be fit but realistically it is not possible. It is about keeping myself positive and keeping myself training every day."