SKELETAL SYSTEM IMAGING
Regarding skeletal diagnostic nuclear medicine methods, Bone Scan and Densitometry have been included. The first one is probably the procedure employed the most of all nuclear medicine armamentarium, bearing excellent sensitivity and the capabilitiy to aid reaching an early diagnosis of bone diseases.
Bone Densitometry is selected due to the fact that it is currently carried out in many nuclear medicine laboratories. Though it is a procedure based on x-rays, it is important to comment that at the begginings of this technique, it was done using a 153-Gadolinium source, which emits two gammas, a low and a high energy gamma, with a half life of 240 days. Later on an x-ray tube replaced the radionuclide source.