Control of the SAR Pattern Within an Interstitial Microwave Array through Variation of Antenna Driving Phase
The interstitial microwave antenna-array hyperthermia (IMAAH) system produces a pattern of specific absorption rate (SAR) that is nonuniform within a 2-cm square array driven in phase at 915 MHz. Theory and experiment show that the point of phase coherence (maximum SAR) can be shifted to a point whe...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 1986-05, Vol.34 (5), p.568-571 |
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| container_end_page | 571 |
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| container_issue | 5 |
| container_start_page | 568 |
| container_title | IEEE transactions on microwave theory and techniques |
| container_volume | 34 |
| creator | Trembly, B.S. Wilson, A.H. Sullivan, M.J. Stein, A.D. Wong, T.Z. Strohbehn, J.W. |
| description | The interstitial microwave antenna-array hyperthermia (IMAAH) system produces a pattern of specific absorption rate (SAR) that is nonuniform within a 2-cm square array driven in phase at 915 MHz. Theory and experiment show that the point of phase coherence (maximum SAR) can be shifted to a point where the SAR is small by changing the antenna driving phases. Rapid shifting makes the time-average SAR more uniform in the direction perpendicular to the antennas. In 95 percent of the antenna junction plane, the time-average SAR is constant within 10 percent. |
| doi_str_mv | 10.1109/TMTT.1986.1133393 |
| format | Article |
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Theory and experiment show that the point of phase coherence (maximum SAR) can be shifted to a point where the SAR is small by changing the antenna driving phases. Rapid shifting makes the time-average SAR more uniform in the direction perpendicular to the antennas. In 95 percent of the antenna junction plane, the time-average SAR is constant within 10 percent.</description><identifier>ISSN: 0018-9480</identifier><identifier>EISSN: 1557-9670</identifier><identifier>DOI: 10.1109/TMTT.1986.1133393</identifier><identifier>CODEN: IETMAB</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Antenna arrays ; Antenna feeds ; Biological and medical sciences ; Catheters ; Conductors ; Control systems ; Dipole antennas ; Electromagnetic heating ; Medical sciences ; Microwave antenna arrays ; Neoplasms ; Phased arrays ; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. 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Theory and experiment show that the point of phase coherence (maximum SAR) can be shifted to a point where the SAR is small by changing the antenna driving phases. Rapid shifting makes the time-average SAR more uniform in the direction perpendicular to the antennas. In 95 percent of the antenna junction plane, the time-average SAR is constant within 10 percent.</description><subject>Antenna arrays</subject><subject>Antenna feeds</subject><subject>Biological and medical sciences</subject><subject>Catheters</subject><subject>Conductors</subject><subject>Control systems</subject><subject>Dipole antennas</subject><subject>Electromagnetic heating</subject><subject>Medical sciences</subject><subject>Microwave antenna arrays</subject><subject>Neoplasms</subject><subject>Phased arrays</subject><subject>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. 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Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</topic><topic>Technology. Biomaterials. Equipments. Material. Instrumentation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Trembly, B.S.</creatorcontrib><creatorcontrib>Wilson, A.H.</creatorcontrib><creatorcontrib>Sullivan, M.J.</creatorcontrib><creatorcontrib>Stein, A.D.</creatorcontrib><creatorcontrib>Wong, T.Z.</creatorcontrib><creatorcontrib>Strohbehn, J.W.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Aerospace Database</collection><jtitle>IEEE transactions on microwave theory and techniques</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Trembly, B.S.</au><au>Wilson, A.H.</au><au>Sullivan, M.J.</au><au>Stein, A.D.</au><au>Wong, T.Z.</au><au>Strohbehn, J.W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Control of the SAR Pattern Within an Interstitial Microwave Array through Variation of Antenna Driving Phase</atitle><jtitle>IEEE transactions on microwave theory and techniques</jtitle><stitle>TMTT</stitle><date>1986-05-01</date><risdate>1986</risdate><volume>34</volume><issue>5</issue><spage>568</spage><epage>571</epage><pages>568-571</pages><issn>0018-9480</issn><eissn>1557-9670</eissn><coden>IETMAB</coden><abstract>The interstitial microwave antenna-array hyperthermia (IMAAH) system produces a pattern of specific absorption rate (SAR) that is nonuniform within a 2-cm square array driven in phase at 915 MHz. Theory and experiment show that the point of phase coherence (maximum SAR) can be shifted to a point where the SAR is small by changing the antenna driving phases. Rapid shifting makes the time-average SAR more uniform in the direction perpendicular to the antennas. In 95 percent of the antenna junction plane, the time-average SAR is constant within 10 percent.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMTT.1986.1133393</doi><tpages>4</tpages></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Antenna arrays Antenna feeds Biological and medical sciences Catheters Conductors Control systems Dipole antennas Electromagnetic heating Medical sciences Microwave antenna arrays Neoplasms Phased arrays Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) Technology. Biomaterials. Equipments. Material. Instrumentation |
| title | Control of the SAR Pattern Within an Interstitial Microwave Array through Variation of Antenna Driving Phase |
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