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Dose reduction by field size trimming in rotational panoramic radiography

Identifieur interne : 000E10 ( Istex/Corpus ); précédent : 000E09; suivant : 000E11

Dose reduction by field size trimming in rotational panoramic radiography

Auteurs : Dagfinn B. Svanaes ; Tore A. Larheim ; Steinar Backe

Source :

RBID : ISTEX:1C6F80880327234644FEF40A9DBE87EA4B8A3DAC

Abstract

A substantial dose reduction may be obtained for patients in need of frequent retakes with rotational panoramic radiography by reducing the width and height of the film area irradiated. An electronic timer was connected to the circuit of an Orthopantomograph 5 (Siemens) whereby exposure limes could easily be selected in the range 5‐15 s. Vertical extracollimation was provided. With the field size reduced to encompass the developing dentition only, about 60% reduction in integral absorbed dose was obtained using standard (Siemens special) screens. With rare earth (Titan HS) screens a reduction of 85% was obtained in integral absorbed dose and absorbed doses to the thyroid gland and eye lens were reduced by 70‐79% and 80‐89%, respectively. The doses thus obtained were equal to or less than those reported with a single dental film in speed Group D.

Url:
DOI: 10.1111/j.1600-0722.1985.tb01310.x

Links to Exploration step

ISTEX:1C6F80880327234644FEF40A9DBE87EA4B8A3DAC

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<publisher>Blackwell Publishing Ltd</publisher>
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<placeTerm type="text">Oxford, UK</placeTerm>
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<dateIssued encoding="w3cdtf">1985-02</dateIssued>
<edition>Accepted for publication 14 July 1984.</edition>
<copyrightDate encoding="w3cdtf">1985</copyrightDate>
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<abstract lang="en">A substantial dose reduction may be obtained for patients in need of frequent retakes with rotational panoramic radiography by reducing the width and height of the film area irradiated. An electronic timer was connected to the circuit of an Orthopantomograph 5 (Siemens) whereby exposure limes could easily be selected in the range 5‐15 s. Vertical extracollimation was provided. With the field size reduced to encompass the developing dentition only, about 60% reduction in integral absorbed dose was obtained using standard (Siemens special) screens. With rare earth (Titan HS) screens a reduction of 85% was obtained in integral absorbed dose and absorbed doses to the thyroid gland and eye lens were reduced by 70‐79% and 80‐89%, respectively. The doses thus obtained were equal to or less than those reported with a single dental film in speed Group D.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>eye dose</topic>
<topic>field size reduction</topic>
<topic>integral absorbed dose</topic>
<topic>thermoluminescent dosimetry</topic>
<topic>thyroid dose</topic>
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<title>European Journal of Oral Sciences</title>
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<identifier type="ISSN">0909-8836</identifier>
<identifier type="eISSN">1600-0722</identifier>
<identifier type="DOI">10.1111/(ISSN)1600-0722</identifier>
<identifier type="PublisherID">EOS</identifier>
<part>
<date>1985</date>
<detail type="volume">
<caption>vol.</caption>
<number>93</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>1</number>
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<extent unit="pages">
<start>61</start>
<end>67</end>
<total>7</total>
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<identifier type="DOI">10.1111/j.1600-0722.1985.tb01310.x</identifier>
<identifier type="ArticleID">EOS61</identifier>
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<recordOrigin>Blackwell Publishing Ltd</recordOrigin>
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