Electromagnetic tracking system with reduced distortion using quadratic excitation
Identifieur interne : 000446 ( Main/Curation ); précédent : 000445; suivant : 000447Electromagnetic tracking system with reduced distortion using quadratic excitation
Auteurs : Tomasz Bien [Allemagne] ; Mengfei Li [Allemagne] ; Zein Salah [Allemagne] ; Georg Rose [Allemagne]Source :
- International Journal of Computer Assisted Radiology and Surgery [ 1861-6410 ] ; 2013.
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Abstract
Electromagnetic tracking systems, frequently used in minimally invasive surgery, are affected by conductive distorters. The influence of conductive distorters on electromagnetic tracking system accuracy can be reduced through magnetic field modifications. This approach was developed and tested.
The voltage induced directly by the emitting coil in the sensing coil without additional influence by the conductive distorter depends on the first derivative of the voltage on the emitting coil. The voltage which is induced indirectly by the emitting coil across the conductive distorter in the sensing coil, however, depends on the second derivative of the voltage on the emitting coil. The electromagnetic tracking system takes advantage of this difference by supplying the emitting coil with a quadratic excitation voltage. The method is adaptive relative to the amount of distortion cause by the conductive distorters. This approach is evaluated with an experimental setup of the electromagnetic tracking system.
In vitro testing showed that the maximal error decreased from 10.9 to 3.8 mm when the quadratic voltage was used to excite the emitting coil instead of the sinusoidal voltage. Furthermore, the root mean square error in the proximity of the aluminum disk used as a conductive distorter was reduced from 3.5 to 1.6 mm when the electromagnetic tracking system used the quadratic instead of sinusoidal excitation.
Electromagnetic tracking with quadratic excitation is immune to the effects of a conductive distorter, especially compared with sinusoidal excitation of the emitting coil. Quadratic excitation of electromagnetic tracking for computer-assisted surgery is promising for clinical applications.
Url:
DOI: 10.1007/s11548-013-0925-4
PubMed: 23918006
PubMed Central: 3955490
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T:electromagnetic:tracking:system</idno><idno type="wicri:Area/Main/Merge">000446</idno><idno type="wicri:Area/Main/Curation">000446</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Electromagnetic tracking system with reduced distortion using quadratic excitation</title><author><name sortKey="Bien, Tomasz" sort="Bien, Tomasz" uniqKey="Bien T" first="Tomasz" last="Bien">Tomasz Bien</name><affiliation wicri:level="3"><nlm:aff id="Aff1">Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg, Germany</nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea>Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg</wicri:regionArea><placeName><region type="land" nuts="2">Saxe-Anhalt</region><settlement type="city">Magdebourg</settlement></placeName></affiliation></author><author><name sortKey="Li, Mengfei" sort="Li, Mengfei" uniqKey="Li M" first="Mengfei" last="Li">Mengfei Li</name><affiliation wicri:level="3"><nlm:aff id="Aff1">Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg, Germany</nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea>Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg</wicri:regionArea><placeName><region type="land" nuts="2">Saxe-Anhalt</region><settlement type="city">Magdebourg</settlement></placeName></affiliation></author><author><name sortKey="Salah, Zein" sort="Salah, Zein" uniqKey="Salah Z" first="Zein" last="Salah">Zein Salah</name><affiliation wicri:level="3"><nlm:aff id="Aff1">Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg, Germany</nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea>Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg</wicri:regionArea><placeName><region type="land" nuts="2">Saxe-Anhalt</region><settlement type="city">Magdebourg</settlement></placeName></affiliation></author><author><name sortKey="Rose, Georg" sort="Rose, Georg" uniqKey="Rose G" first="Georg" last="Rose">Georg Rose</name><affiliation wicri:level="3"><nlm:aff id="Aff1">Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg, Germany</nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea>Chair for Healthcare Telematics and Medical Engineering, Otto-von-Guericke University, Magdeburg</wicri:regionArea><placeName><region type="land" nuts="2">Saxe-Anhalt</region><settlement type="city">Magdebourg</settlement></placeName></affiliation></author></analytic><series><title level="j">International Journal of Computer Assisted Radiology and Surgery</title><idno type="ISSN">1861-6410</idno><idno type="eISSN">1861-6429</idno><imprint><date when="2013">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Computer Simulation</term><term>Electromagnetic Phenomena</term><term>Humans</term><term>Phantoms, Imaging</term><term>Surgery, Computer-Assisted (methods)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Chirurgie assistée par ordinateur ()</term><term>Fantômes en imagerie</term><term>Humains</term><term>Phénomènes électromagnétiques</term><term>Simulation numérique</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Surgery, Computer-Assisted</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Computer Simulation</term><term>Electromagnetic Phenomena</term><term>Humans</term><term>Phantoms, Imaging</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Chirurgie assistée par ordinateur</term><term>Fantômes en imagerie</term><term>Humains</term><term>Phénomènes électromagnétiques</term><term>Simulation numérique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Purpose</title><p> Electromagnetic tracking systems, frequently used in minimally invasive surgery, are affected by conductive distorters. The influence of conductive distorters on electromagnetic tracking system accuracy can be reduced through magnetic field modifications. This approach was developed and tested.</p></sec><sec><title>Methods</title><p> The voltage induced directly by the emitting coil in the sensing coil without additional influence by the conductive distorter depends on the first derivative of the voltage on the emitting coil. The voltage which is induced indirectly by the emitting coil across the conductive distorter in the sensing coil, however, depends on the second derivative of the voltage on the emitting coil. The electromagnetic tracking system takes advantage of this difference by supplying the emitting coil with a quadratic excitation voltage. The method is adaptive relative to the amount of distortion cause by the conductive distorters. This approach is evaluated with an experimental setup of the electromagnetic tracking system.</p></sec><sec><title>Results</title><p> In vitro testing showed that the maximal error decreased from 10.9 to 3.8 mm when the quadratic voltage was used to excite the emitting coil instead of the sinusoidal voltage. Furthermore, the root mean square error in the proximity of the aluminum disk used as a conductive distorter was reduced from 3.5 to 1.6 mm when the electromagnetic tracking system used the quadratic instead of sinusoidal excitation.</p></sec><sec><title>Conclusions</title><p> Electromagnetic tracking with quadratic excitation is immune to the effects of a conductive distorter, especially compared with sinusoidal excitation of the emitting coil. Quadratic excitation of electromagnetic tracking for computer-assisted surgery is promising for clinical applications.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Birkfellner, W" uniqKey="Birkfellner W">W Birkfellner</name></author><author><name sortKey="Hummel, J" uniqKey="Hummel J">J Hummel</name></author><author><name sortKey="Wilson, E" uniqKey="Wilson E">E Wilson</name></author><author><name sortKey="Cleary, K" uniqKey="Cleary K">K Cleary</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Weiser, T" uniqKey="Weiser T">T Weiser</name></author><author><name sortKey="Hyman, K" uniqKey="Hyman K">K Hyman</name></author><author><name sortKey="Yun, J" uniqKey="Yun J">J Yun</name></author><author><name sortKey="Litle, V" uniqKey="Litle V">V Litle</name></author><author><name sortKey="Chin, C" uniqKey="Chin C">C Chin</name></author><author><name sortKey="Swanson, S" uniqKey="Swanson S">S Swanson</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Lascalza, S" uniqKey="Lascalza S">S LaScalza</name></author><author><name sortKey="Arico, J" uniqKey="Arico J">J Arico</name></author><author><name sortKey="Hughes, R" uniqKey="Hughes R">R Hughes</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Birkfellner, W" uniqKey="Birkfellner W">W Birkfellner</name></author><author><name sortKey="Watzinger, F" uniqKey="Watzinger F">F Watzinger</name></author><author><name sortKey="Wanschitz, F" uniqKey="Wanschitz F">F Wanschitz</name></author><author><name sortKey="Ewers, R" uniqKey="Ewers R">R Ewers</name></author><author><name sortKey="Bergmann, H" uniqKey="Bergmann H">H Bergmann</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Schuler, N" uniqKey="Schuler N">N Schuler</name></author><author><name sortKey="Bey, M" uniqKey="Bey M">M Bey</name></author><author><name sortKey="Shearn, J" uniqKey="Shearn J">J Shearn</name></author><author><name sortKey="Butler, D" uniqKey="Butler D">D Butler</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Poulin, F" uniqKey="Poulin F">F Poulin</name></author><author><name sortKey="Amiot, L" uniqKey="Amiot L">L Amiot</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hummel, J" uniqKey="Hummel J">J Hummel</name></author><author><name sortKey="Figl, M" uniqKey="Figl M">M Figl</name></author><author><name sortKey="Birkfellner, W" uniqKey="Birkfellner W">W Birkfellner</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Kindratenko, V" uniqKey="Kindratenko V">V Kindratenko</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Plotkin, A" uniqKey="Plotkin A">A Plotkin</name></author><author><name sortKey="Kucher, V" uniqKey="Kucher V">V Kucher</name></author><author><name sortKey="Horen, Y" uniqKey="Horen Y">Y Horen</name></author><author><name sortKey="Paperno, E" uniqKey="Paperno E">E Paperno</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Fitzpatrick, Jm" uniqKey="Fitzpatrick J">JM Fitzpatrick</name></author><author><name sortKey="Hill, Dl" uniqKey="Hill D">DL Hill</name></author></analytic></biblStruct></listBibl></div1></back></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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