The penetration characteristic of radio wave frequencies from oral cavities.
Identifieur interne : 002E23 ( PubMed/Checkpoint ); précédent : 002E22; suivant : 002E24The penetration characteristic of radio wave frequencies from oral cavities.
Auteurs : T. Watanabe [Japon] ; K. Kobayashi ; M. NagaoSource :
- Frontiers of medical and biological engineering : the international journal of the Japan Society of Medical Electronics and Biological Engineering [ 0921-3775 ] ; 1999.
Descripteurs français
- KwdFr :
- MESH :
- physiologie : Bouche.
- physiopathologie : Mâchoire édentée.
- Femelle, Humains, Mâle, Ondes hertziennes, Prothèse dentaire complète, Sujet âgé, Sujet âgé de 80 ans ou plus, Télémesure.
English descriptors
- KwdEn :
- MESH :
- methods : Telemetry.
- physiology : Mouth.
- physiopathology : Jaw, Edentulous.
- Aged, Aged, 80 and over, Denture, Complete, Female, Humans, Male, Radio Waves.
Abstract
Recently many radio telemetry systems have been inserted into oral cavities and have been used to send data to receivers. Although various frequencies were used in those systems, there has been no report about the most effective penetrative frequency in the human body. In this study, we observed the penetration of radio waves from oral cavities and compared the efficiency of different frequencies. We selected 11 edentulous persons as subjects and the frequencies ranged from 1 to 150 MHz. Although the attenuation gradually increased with the increase of frequency in most cases, we observed that there were effective resonance-like frequencies in three subjects and the frequency differed from person to person. This phenomenon was only observed when receiving antennas were set beside the mouth and not observed when the antennas were set about 1 m away from subjects. Therefore, it is considered that this phenomenon was produced by the relationship between the transmitting antenna and the receiving antenna. This result suggested that there were effective resonance-like frequencies in the case of radiation from edentulous oral cavities.
PubMed: 10354906
Affiliations:
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Watanabe</name><affiliation wicri:level="1"><nlm:affiliation>Department of Geriatric Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Department of Geriatric Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University</wicri:regionArea><wicri:noRegion>Tokyo Medical and Dental University</wicri:noRegion></affiliation></author><author><name sortKey="Kobayashi, K" sort="Kobayashi, K" uniqKey="Kobayashi K" first="K" last="Kobayashi">K. Kobayashi</name></author><author><name sortKey="Nagao, M" sort="Nagao, M" uniqKey="Nagao M" first="M" last="Nagao">M. Nagao</name></author></analytic><series><title level="j">Frontiers of medical and biological engineering : the international journal of the Japan Society of Medical Electronics and Biological Engineering</title><idno type="ISSN">0921-3775</idno><imprint><date when="1999" type="published">1999</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aged</term><term>Aged, 80 and over</term><term>Denture, Complete</term><term>Female</term><term>Humans</term><term>Jaw, Edentulous (physiopathology)</term><term>Male</term><term>Mouth (physiology)</term><term>Radio Waves</term><term>Telemetry (methods)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Bouche (physiologie)</term><term>Femelle</term><term>Humains</term><term>Mâchoire édentée (physiopathologie)</term><term>Mâle</term><term>Ondes hertziennes</term><term>Prothèse dentaire complète</term><term>Sujet âgé</term><term>Sujet âgé de 80 ans ou plus</term><term>Télémesure ()</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Telemetry</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Bouche</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Mouth</term></keywords><keywords scheme="MESH" qualifier="physiopathologie" xml:lang="fr"><term>Mâchoire édentée</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Jaw, Edentulous</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Aged, 80 and over</term><term>Denture, Complete</term><term>Female</term><term>Humans</term><term>Male</term><term>Radio Waves</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Femelle</term><term>Humains</term><term>Mâle</term><term>Ondes hertziennes</term><term>Prothèse dentaire complète</term><term>Sujet âgé</term><term>Sujet âgé de 80 ans ou plus</term><term>Télémesure</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Recently many radio telemetry systems have been inserted into oral cavities and have been used to send data to receivers. Although various frequencies were used in those systems, there has been no report about the most effective penetrative frequency in the human body. In this study, we observed the penetration of radio waves from oral cavities and compared the efficiency of different frequencies. We selected 11 edentulous persons as subjects and the frequencies ranged from 1 to 150 MHz. Although the attenuation gradually increased with the increase of frequency in most cases, we observed that there were effective resonance-like frequencies in three subjects and the frequency differed from person to person. This phenomenon was only observed when receiving antennas were set beside the mouth and not observed when the antennas were set about 1 m away from subjects. Therefore, it is considered that this phenomenon was produced by the relationship between the transmitting antenna and the receiving antenna. This result suggested that there were effective resonance-like frequencies in the case of radiation from edentulous oral cavities.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">10354906</PMID><DateCompleted><Year>1999</Year><Month>07</Month><Day>20</Day></DateCompleted><DateRevised><Year>2004</Year><Month>11</Month><Day>17</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0921-3775</ISSN><JournalIssue CitedMedium="Print"><Volume>9</Volume><Issue>1</Issue><PubDate><Year>1999</Year></PubDate></JournalIssue><Title>Frontiers of medical and biological engineering : the international journal of the Japan Society of Medical Electronics and Biological Engineering</Title><ISOAbbreviation>Front Med Biol Eng</ISOAbbreviation></Journal><ArticleTitle>The penetration characteristic of radio wave frequencies from oral cavities.</ArticleTitle><Pagination><MedlinePgn>1-7</MedlinePgn></Pagination><Abstract><AbstractText>Recently many radio telemetry systems have been inserted into oral cavities and have been used to send data to receivers. Although various frequencies were used in those systems, there has been no report about the most effective penetrative frequency in the human body. In this study, we observed the penetration of radio waves from oral cavities and compared the efficiency of different frequencies. We selected 11 edentulous persons as subjects and the frequencies ranged from 1 to 150 MHz. Although the attenuation gradually increased with the increase of frequency in most cases, we observed that there were effective resonance-like frequencies in three subjects and the frequency differed from person to person. This phenomenon was only observed when receiving antennas were set beside the mouth and not observed when the antennas were set about 1 m away from subjects. Therefore, it is considered that this phenomenon was produced by the relationship between the transmitting antenna and the receiving antenna. This result suggested that there were effective resonance-like frequencies in the case of radiation from edentulous oral cavities.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Watanabe</LastName><ForeName>T</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>Department of Geriatric Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kobayashi</LastName><ForeName>K</ForeName><Initials>K</Initials></Author><Author ValidYN="Y"><LastName>Nagao</LastName><ForeName>M</ForeName><Initials>M</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016430">Clinical Trial</PublicationType><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Netherlands</Country><MedlineTA>Front Med Biol Eng</MedlineTA><NlmUniqueID>9011464</NlmUniqueID><ISSNLinking>0921-3775</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000368" MajorTopicYN="N">Aged</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D000369" MajorTopicYN="N">Aged, 80 and over</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D003824" MajorTopicYN="Y">Denture, Complete</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005260" MajorTopicYN="N">Female</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D007575" MajorTopicYN="N">Jaw, Edentulous</DescriptorName><QualifierName UI="Q000503" MajorTopicYN="Y">physiopathology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008297" MajorTopicYN="N">Male</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009055" MajorTopicYN="N">Mouth</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D011846" MajorTopicYN="Y">Radio Waves</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013686" MajorTopicYN="N">Telemetry</DescriptorName><QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>1999</Year><Month>6</Month><Day>4</Day></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1999</Year><Month>6</Month><Day>4</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>1999</Year><Month>6</Month><Day>4</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">10354906</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Japon</li></country></list><tree><noCountry><name sortKey="Kobayashi, K" sort="Kobayashi, K" uniqKey="Kobayashi K" first="K" last="Kobayashi">K. Kobayashi</name><name sortKey="Nagao, M" sort="Nagao, M" uniqKey="Nagao M" first="M" last="Nagao">M. Nagao</name></noCountry><country name="Japon"><noRegion><name sortKey="Watanabe, T" sort="Watanabe, T" uniqKey="Watanabe T" first="T" last="Watanabe">T. Watanabe</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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