Development of a non-invasive intracranial three dimensional thermography system


  1. Uzunoglu, N.
  2. Ventouras, E.
  3. Karanasiou, I.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Microwave and Fiber Optics Lab, Athens (Greece) Inst of Communication and Computer Systems
During the past 30 years, many researchers have proposed and used to some extend the microwave radiometry technology to measure non-invasively the temperature distribution within the human body. The reasoning in this suggestion is the fact that microwaves at the frequency region 1-5 GHz have sufficient penetration into human tissues, while they can also provide satisfactory directivity. Another reason in putting forward this idea is the failure of infrared (IR) thermography techniques to provide useful information for the temperature distribution within the human body. Indeed, despite the fact that the human body emits maximum radiation at the IR wavelengths, the very high attenuation of this radiation passing through tissues makes the IR thermography techniques only a limited value. Although the amount of energy emitted by human tissues at microwave wavelengths is realtively small, temperature distribution inside the human body can be measured at least up to 5-7 cm depths. Furthermore the technology defined in this report can lead into measurement ability up to 10 cm. However, there is a practical problem in sensing the radiated intracranial thermal energy in the microwave frequency regime. TRUNCATED
Heat stroke;Brain core temperature;Non-invasive measurement;Intracranial thermography system;Ellipsodial cavity;Microwave antennas
Report Number
DCIEM-CR-2000-088 — Contractor Report
Date of publication
01 May 2000
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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