See ICRP Pub 53, Annals of the ICRP, Radiation Dose to Patients from Radiopharmaceuticals. Bone scans are done with phosphonates. Effective dose equivalent (mSv/MBq) for patient with normal bone uptake and normally functioning kidneys is given as 8.0E-03 mSv/MBq). Tc-99m doses for bone scans are about 25 mCi.