There are several advantages of the PET technique, which are common to PET imaging in general, including improved spatial resolution and more developed attenuation correction techniques. Patient experience is improved as imaging can be started much more quickly following radiopharmaceutical injection (30-45 minutes, compared to 2-3 hours for MDP/HDP).[26][27] [18F]NaF PET is hampered by high demand for scanners, and limited tracer availability.[28][29]