Radionics (also called electromagnetic therapy (EMT)) is a form of alternative medicine that claims disease can be diagnosed and treated by applying electromagnetic radiation (EMR), such as radio waves, to the body from an electrically powered device. It is similar to magnet therapy which also applies EMR to the body, but using a magnet that generates a static electromagnetic field.An original Rife machine from 1922An 'Electro-metabograph', an apparatus which supposedly diagnosed and cured diseases by using radio waves Radionics (also called electromagnetic therapy (EMT)) is a form of alternative medicine that claims disease can be diagnosed and treated by applying electromagnetic radiation (EMR), such as radio waves, to the body from an electrically powered device. It is similar to magnet therapy which also applies EMR to the body, but using a magnet that generates a static electromagnetic field. The concept behind radionics originated in the early 1900s with Albert Abrams (1864–1924), who became a millionaire by leasing radionic machines which he designed himself. Radionics contradicts the principles of physics and biology and, as such, is widely considered pseudoscientific. The United States Food and Drug Administration does not recognize any legitimate medical uses for radionic devices. Several systematic reviews have shown radionics is no more effective than placebo and falls into the category of pseudoscience. In the 1900s, Albert Abrams (1864–1924) claimed to detect 'energy frequencies' in people's bodies. The idea was that a healthy person will have certain energy frequencies moving through their body that define health, while an unhealthy person will exhibit other, different energy frequencies that define disorders. He said he could cure people by 'balancing' their discordant frequencies, and claimed that his devices sensitive enough that he could tell someone's religion by looking at a drop of blood. He developed thirteen devices and became a millionaire leasing his devices, and the American Medical Association described him as the 'dean of gadget quacks.' His devices were definitively proven useless by an independent investigation commissioned by Scientific American in 1924. He used 'frequency' not in its standard meaning but to describe an imputed energy type, which does not correspond to any property of energy in the scientific sense. In one form of radionics popularised by Abrams, some blood on a bit of filter paper is attached to a device Abrams called a dynamizer, which is attached by wires to a string of other devices and then to the forehead of a healthy volunteer, facing west in a dim light. By tapping on his abdomen and searching for areas of 'dullness', disease in the donor of the blood is diagnosed by proxy. Handwriting analysis is also used to diagnose disease under this scheme. Having done this, the practitioner may use a special device known as an oscilloclast or any of a range of other devices to broadcast vibrations at the patient in order to attempt to heal them. Other notable quack devices in radionics have included the Ionaco and the Hieronymus machine. Some people claim to have the paranormal or parapsychological ability to detect 'radiation' within the human body, which they call radiesthesia. According to the theory, all human bodies give off unique or characteristic 'radiations' as do all other physical bodies or objects. Such radiations are often termed an 'aura'. Radiesthesia is cited as the explanation of such phenomena as dowsing by rods and pendulums in order to locate buried substances, diagnose illnesses, and the like. Radiesthesia has been described as a mixture of occultism and pseudoscience by critics. Modern practitioners conceptualize these devices merely as a focusing aid to the practitioner's proclaimed dowsing abilities, and claim that there is no longer any need for the device to have any demonstrable function. Indeed, Abrams' black boxes had no purpose of their own, being merely obfuscated collections of wires and electronic parts. Contemporary proponents of radionics or EMT claim that where there is an imbalance of electromagnetic fields or frequencies, within the body, that it causes diseases or other illnesses by disrupting the body's chemical makeup. These practitioners believe that applications of electromagnetic energy from outside the body can correct these imbalances. Like magnet therapy, electromagnetic therapy has been proposed by practitioners of alternative medicine for a variety of purposes, including, according to the American Cancer Society, 'ulcers, headaches, burns, chronic pain, nerve disorders, spinal cord injuries, diabetes, gum infections, asthma, bronchitis, arthritis, cerebral palsy, heart disease, and cancer.'