Final answer:
The gold standard for the diagnosis of Avascular Necrosis (AVN) of bone is magnetic resonance imaging (MRI). It is the most reliable and sensitive method for detecting AVN.
Step-by-step explanation:
The gold standard for the diagnosis of Avascular Necrosis (AVN) of bone is magnetic resonance imaging (MRI).
AVN is a condition characterized by the death of bone tissue due to poor blood supply. MRI can accurately detect early signs of AVN, such as bone marrow edema or necrosis. It can provide detailed images of the affected bone and help in staging the severity of the disease.
In some cases, other diagnostic tools such as X-rays and bone scans may be used to support the diagnosis, but MRI is the most reliable and sensitive method for detecting AVN.