Positron emission tomography has been used in the treatment of Hodgkin's Disease for a while now, and it seems to be an effective treatment, or, at the very least, seems to be as effective as the comparable or similar treatments. The treatment is also a direct application of modern physics.
Positron emission tomography gives you a better look at and, therefore, a better understanding of all growths within the body, benign or otherwise. If you can get a better look at and understanding of a cancer, you have a much better chance at treating it. This is really a no brainer.
If there is a lot of research that shows this type of treatment is safe for people, and proves that the disease is cured by these treatments, then yes I do think that we should use the treatments. If we have found that it works, then why not use it.
Positron emission tomography should not be used as part of the treatment of Hodgkin's Disease unless alternative treatments have failed. The side effects associated with the treatment bring pause to the idea that it is the ideal cure/management tool. Doctors need to look into diet, supplements, and exercises to get a better grasp on perhaps even better cures.
According to Wikipedia Positron emission tomography is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body. In my opinion this is not a decision for the masses to make, it is a decision that should be left up to physicians familiar with Hodgkin's Disease.