The basics are as follows:
Human energy field/Aura/Reiki is a field of energy that surrounds and penetrates the body and also emits from every living thing (like the force, just less exciting). They even have a colour (if you are particularly aware) that depends on your base emotional state.
A healing touch practitioner is able to interact with this field and remove any blocks to the ‘vital flow of energy’ that a patient may have. This then allows the now considerably fiscally poorer patient to absorb more energy from the universe (I can only assume they mean background radiation) to speed up healing. All this without requiring any of that nasty medical equipment that would only clutter up the place, increase overheads and leave less space for fairy themed paraphernalia.