Is a bone scan advised with my symptoms?

Had prostatectomy 2 years ago. All PSA's since then < 0.1 inlcuding the one in Feb 07. Have had mild, dull hip pain for last 4 weeks (right side only). Only hurts when sitting. Have a new bicycle with narrow seat. Pain worse after riding so I quit riding. My doctor (GP) did a quick exam and is sending me for bone scan, supposedly suspecting a hairline crack in hip bone. Do the symptoms fit this preliminary diagnosis? By the way, had MRI bone scan before surgery in 2005 which was negative for bone cancer. Should I go ahead with the bone scan for the value of it finding other things?