Microstrip-antenna design for hyperthermia treatment of superficial tumors
- University of Ancona (Italy)
Microstrip antennas have many different advantages over other RF/MW radiative applicators employed for superficial hyperthermia treatment. This is mainly due to their compact and body-conformable structure as well as to printed circuit board techniques, both of which allow a wide design flexibility for superficial tumor heating. Among the wide variety of radiator configurations, three microstrip antennas of increasing complexity with electromagnetic and heating characteristics potentially suitable as applicators for superficial hyperthermia have been designed, developed, and tested in different radiative condition: a microstrip disk, a microstrip annular-slot, and a microstrip spiral. Electromagnetic design criteria are presented together with the determinations of the applicator return loss versus frequency and thermograms of the near-field heating pattern in muscle-like phantom. The results are in good agreement with theory and indicated that: the operating frequency is either single or multiple according to the applicator-mode, 'resonant' or 'traveling-wave', and can be chosen in the useful frequency range for hyperthermia according to the tumor cross-section and depth; the heating pattern flexibility increases going form the simple geometry disk to the annular-slot and spiral applicators; a distilled-water bolus is required; the annular-slot applicator exhibits the highest efficiency, while the spiral applicator provides the best performance.
- OSTI ID:
- 6967851
- Journal Information:
- IEEE Transactions on Bio-Medical Engineering (Institute of Electrical and Electronics Engineers); (United States), Vol. 39:6; ISSN 0018-9294
- Country of Publication:
- United States
- Language:
- English
Similar Records
Body conformable 915 MHz microstrip array applicators for large surface area hyperthermia
1984 IEEE MTT-S international microwave symposium digest