Preoperative radiographic evaluation of implant sites by computed tomography. Radiation dose profiles.
Identifieur interne : 004523 ( PubMed/Corpus ); précédent : 004522; suivant : 004524Preoperative radiographic evaluation of implant sites by computed tomography. Radiation dose profiles.
Auteurs : U. Fredholm ; A. Bolin ; C O Henrikson ; T. CederlundSource :
- Swedish dental journal [ 0347-9994 ] ; 1994.
English descriptors
- KwdEn :
- MESH :
- chemical : Dental Implants.
- diagnostic imaging : Jaw, Edentulous.
- Absorptiometry, Photon, Humans, Models, Structural, Patient Care Planning, Preoperative Care, Radiation Dosage, Thermoluminescent Dosimetry, Tomography, X-Ray Computed.
Abstract
The purpose of the present study was to compare radiation dose profiles for one and two mm slice thicknesses typically used for preoperative computed tomographic examination of potential implant sites. A Siemens Somatom DRH CT-system was used. A single two mm slice absorbed only 29% of the integral dose and a single one mm slice, absorbed only 17% of the integral dose. This is because the radiation beam was unchanged between the two different examinations. The integral dose is therefore identical for a single one mm slice and for a single two mm slice. When 10 consecutively two mm thick slices were exposed, approximately 50% of the integral dose was absorbed within the examined region. When 20 one mm thick slices were exposed, slightly less of the integral dose was absorbed within the examined region. This difference may be explained by uncertaines in the measuring instruments. The integral dose is, with the 10 two mm thick slices, half the integral dose compared to a serie of 20 one mm slices. In spite of a well restricted beam, more than half of the integral dose is absorbed outside the examined part. Consequently, during examination the thyroid gland, the eyes lens and the pituitary gland will be exposed to some irradiation.
PubMed: 7725235
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Cederlund</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1994">1994</date><idno type="RBID">pubmed:7725235</idno><idno type="pmid">7725235</idno><idno type="wicri:Area/PubMed/Corpus">004523</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">004523</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Preoperative radiographic evaluation of implant sites by computed tomography. Radiation dose profiles.</title><author><name sortKey="Fredholm, U" sort="Fredholm, U" uniqKey="Fredholm U" first="U" last="Fredholm">U. Fredholm</name><affiliation><nlm:affiliation>Department of Oral Diagnostic Radiology, Karolinska Institutet, Huddinge, Sweden.</nlm:affiliation></affiliation></author><author><name sortKey="Bolin, A" sort="Bolin, A" uniqKey="Bolin A" first="A" last="Bolin">A. Bolin</name></author><author><name sortKey="Henrikson, C O" sort="Henrikson, C O" uniqKey="Henrikson C" first="C O" last="Henrikson">C O Henrikson</name></author><author><name sortKey="Cederlund, T" sort="Cederlund, T" uniqKey="Cederlund T" first="T" last="Cederlund">T. Cederlund</name></author></analytic><series><title level="j">Swedish dental journal</title><idno type="ISSN">0347-9994</idno><imprint><date when="1994" type="published">1994</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absorptiometry, Photon</term><term>Dental Implants</term><term>Humans</term><term>Jaw, Edentulous (diagnostic imaging)</term><term>Models, Structural</term><term>Patient Care Planning</term><term>Preoperative Care</term><term>Radiation Dosage</term><term>Thermoluminescent Dosimetry</term><term>Tomography, X-Ray Computed</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Dental Implants</term></keywords><keywords scheme="MESH" qualifier="diagnostic imaging" xml:lang="en"><term>Jaw, Edentulous</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Absorptiometry, Photon</term><term>Humans</term><term>Models, Structural</term><term>Patient Care Planning</term><term>Preoperative Care</term><term>Radiation Dosage</term><term>Thermoluminescent Dosimetry</term><term>Tomography, X-Ray Computed</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The purpose of the present study was to compare radiation dose profiles for one and two mm slice thicknesses typically used for preoperative computed tomographic examination of potential implant sites. A Siemens Somatom DRH CT-system was used. A single two mm slice absorbed only 29% of the integral dose and a single one mm slice, absorbed only 17% of the integral dose. This is because the radiation beam was unchanged between the two different examinations. The integral dose is therefore identical for a single one mm slice and for a single two mm slice. When 10 consecutively two mm thick slices were exposed, approximately 50% of the integral dose was absorbed within the examined region. When 20 one mm thick slices were exposed, slightly less of the integral dose was absorbed within the examined region. This difference may be explained by uncertaines in the measuring instruments. The integral dose is, with the 10 two mm thick slices, half the integral dose compared to a serie of 20 one mm slices. In spite of a well restricted beam, more than half of the integral dose is absorbed outside the examined part. Consequently, during examination the thyroid gland, the eyes lens and the pituitary gland will be exposed to some irradiation.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">7725235</PMID><DateCompleted><Year>1995</Year><Month>05</Month><Day>23</Day></DateCompleted><DateRevised><Year>2016</Year><Month>11</Month><Day>23</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0347-9994</ISSN><JournalIssue CitedMedium="Print"><Volume>18</Volume><Issue>6</Issue><PubDate><Year>1994</Year></PubDate></JournalIssue><Title>Swedish dental journal</Title><ISOAbbreviation>Swed Dent J</ISOAbbreviation></Journal><ArticleTitle>Preoperative radiographic evaluation of implant sites by computed tomography. Radiation dose profiles.</ArticleTitle><Pagination><MedlinePgn>213-9</MedlinePgn></Pagination><Abstract><AbstractText>The purpose of the present study was to compare radiation dose profiles for one and two mm slice thicknesses typically used for preoperative computed tomographic examination of potential implant sites. A Siemens Somatom DRH CT-system was used. A single two mm slice absorbed only 29% of the integral dose and a single one mm slice, absorbed only 17% of the integral dose. This is because the radiation beam was unchanged between the two different examinations. The integral dose is therefore identical for a single one mm slice and for a single two mm slice. When 10 consecutively two mm thick slices were exposed, approximately 50% of the integral dose was absorbed within the examined region. When 20 one mm thick slices were exposed, slightly less of the integral dose was absorbed within the examined region. This difference may be explained by uncertaines in the measuring instruments. The integral dose is, with the 10 two mm thick slices, half the integral dose compared to a serie of 20 one mm slices. In spite of a well restricted beam, more than half of the integral dose is absorbed outside the examined part. Consequently, during examination the thyroid gland, the eyes lens and the pituitary gland will be exposed to some irradiation.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Fredholm</LastName><ForeName>U</ForeName><Initials>U</Initials><AffiliationInfo><Affiliation>Department of Oral Diagnostic Radiology, Karolinska Institutet, Huddinge, Sweden.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Bolin</LastName><ForeName>A</ForeName><Initials>A</Initials></Author><Author ValidYN="Y"><LastName>Henrikson</LastName><ForeName>C O</ForeName><Initials>CO</Initials></Author><Author ValidYN="Y"><LastName>Cederlund</LastName><ForeName>T</ForeName><Initials>T</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Sweden</Country><MedlineTA>Swed Dent J</MedlineTA><NlmUniqueID>7706129</NlmUniqueID><ISSNLinking>0347-9994</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D015921">Dental Implants</NameOfSubstance></Chemical></ChemicalList><CitationSubset>D</CitationSubset><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D015502" MajorTopicYN="N">Absorptiometry, Photon</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D015921" MajorTopicYN="Y">Dental Implants</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D007575" MajorTopicYN="N">Jaw, Edentulous</DescriptorName><QualifierName UI="Q000000981" MajorTopicYN="Y">diagnostic imaging</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008961" MajorTopicYN="N">Models, Structural</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010347" MajorTopicYN="N">Patient Care Planning</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D011300" MajorTopicYN="N">Preoperative Care</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D011829" MajorTopicYN="N">Radiation Dosage</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013819" MajorTopicYN="N">Thermoluminescent Dosimetry</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014057" MajorTopicYN="N">Tomography, X-Ray Computed</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>1994</Year><Month>1</Month><Day>1</Day></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1994</Year><Month>1</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>1994</Year><Month>1</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">7725235</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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