FULL SYSTEM VIEW

Harold Swartz and his colleagues at the Dartmouth Biodosimetry Center for Medical Countermeasures against Radiation are developing electron paramagnetic resonance (EPR) dosimetry that can measure electromagnetic signals, or wave forms, given off by teeth (as well as by fingernails and toenails) of people exposed to radiation....[More]

FULL SYSTEM VIEW

Harold Swartz and his colleagues at the Dartmouth Biodosimetry Center for Medical Countermeasures against Radiation are developing electron paramagnetic resonance (EPR) dosimetry that can measure electromagnetic signals, or wave forms, given off by teeth (as well as by fingernails and toenails) of people exposed to radiation.  [Less] [Link to this slide]

HOLD STILL

Of the dosimeters Swartz and his team are developing, the one that measures exposure to ionizing radiation via the teeth is the furthest along. It consists of a magnet, a source of (harmless) microwave radiation, and a device that senses the reflected microwaves....[More]

HOLD STILL

Of the dosimeters Swartz and his team are developing, the one that measures exposure to ionizing radiation via the teeth is the furthest along. It consists of a magnet, a source of (harmless) microwave radiation, and a device that senses the reflected microwaves. The person examined places his head between the poles of the magnet and rests his mouth on a bar.  [Less] [Link to this slide]

SENSING LOOP

The tip of a resonator is placed against a tooth, which it scans about a dozen times over a period of three minutes. Free radicals in that tooth will absorb some portion of this microwave radiation....[More]

SENSING LOOP

The tip of a resonator is placed against a tooth, which it scans about a dozen times over a period of three minutes. Free radicals in that tooth will absorb some portion of this microwave radiation. The dosimeter can determine the level of free radicals by comparing the amount of microwave radiation emitted with the amount that is reflected. The less reflected radiation, the more free radicals in the tooth.  [Less] [Link to this slide]

Swartz and his team are looking to make their dosimeters more sensitive and smaller so they can easily deployed in the field.