Title :
Variations in the design of a helical tip microwave antenna for hyperthermia
Author :
Ryan, T.P. ; Strohbehn, J.W.
Author_Institution :
Thayer Sch. of Eng., Dartmouth Coll., Hanover, NH, USA
Abstract :
Several design variations were tested in Guy muscle equivalent phantom. A phantom experiment was set up to measure power deposition at 221 or 425 points in the plane of a single antenna or pair of antennas. Antennas were constructed and tested with different helical designs. Antennas with helical-tip vs. helical-junction connections were compared. Oppositely wound pairs were tested and compared with identically wound helixes. The effect of a large junction gap was investigated. A dual-density winding antenna was tested to improve power deposition. All antennas were tested singly and in pairs to gauge interaction. The control antennas were Dartmouth dipoles used in clinical hyperthermia. Finally, actual human temperature data are shown and compared to power deposition patterns. Clinical implications for the antenna array data are discussed
Keywords :
biomedical equipment; biothermics; microwave antennas; radiation therapy; Dartmouth dipoles; Guy muscle equivalent phantom; control antennas; design variations; dual-density winding antenna; helical tip microwave antenna; helical-junction connection; human temperature data; hyperthermia; medical instrumentation; power deposition patterns; radiation therapy; Antenna measurements; Dipole antennas; Helical antennas; Hyperthermia; Imaging phantoms; Microwave antennas; Muscles; Power measurement; Testing; Wounds;
Conference_Titel :
Bioengineering Conference, 1988., Proceedings of the 1988 Fourteenth Annual Northeast
Conference_Location :
Durham, NH
DOI :
10.1109/NEBC.1988.19364
