Heating Induced near Deep Brain Stimulation Lead Electrodes during Magnetic Resonance Imaging with a 3T Transceive Volume Head Coil
Identifieur interne : 000598 ( Ncbi/Checkpoint ); précédent : 000597; suivant : 000599Heating Induced near Deep Brain Stimulation Lead Electrodes during Magnetic Resonance Imaging with a 3T Transceive Volume Head Coil
Auteurs : Devashish Shrivastava ; Aviva Abosch ; John Hughes ; Ute Goerke ; Lance Delabarre ; Rachana Visaria ; Noam Harel ; J. Thomas VaughanSource :
- Physics in medicine and biology [ 0031-9155 ] ; 2012.
Abstract
Heating induced near deep brain stimulation (DBS) lead electrodes during MRI with a 3T transceive head coil was measured, modeled, and imaged in three cadaveric porcine heads (mean body weight = 85.47±3.19 kg, mean head weight = 5.78±0.32 kg). The effect of the placement of the extra-cranial portion of the DBS lead on the heating was investigated by looping the extra-cranial lead on the top, side, and back of the head; and placing it parallel to the coil’s longitudinal axial direction. The heating was induced using a 641 s long turbo spin echo sequence with the mean whole head average SAR of 3.16 W/kg. Temperatures were measured using fluoroptic probes at the scalp, first and second electrodes from the distal lead tip, and 6 mm distal from electrode 1 (T6mm). The heating was modeled using the maximum T6mm and imaged using a proton resonance frequency shift based MR thermometry method. Results showed that the heating was significantly reduced when the extra-cranial lead was placed in the longitudinal direction compared to the other placements (peak temperature change = 1.5–3.2 °C vs 5.1–24.7 °C). Thermal modeling and MR thermometry may be used together to determine the heating and improve patient safety online.
Url:
DOI: 10.1088/0031-9155/57/17/5651
PubMed: 22892760
PubMed Central: 3469254
Affiliations:
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Thomas" last="Vaughan">J. Thomas Vaughan</name></author></analytic><series><title level="j">Physics in medicine and biology</title><idno type="ISSN">0031-9155</idno><idno type="eISSN">1361-6560</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p id="P1">Heating induced near deep brain stimulation (DBS) lead electrodes during MRI with a 3T transceive head coil was measured, modeled, and imaged in three cadaveric porcine heads (mean body weight = 85.47±3.19 kg, mean head weight = 5.78±0.32 kg). The effect of the placement of the extra-cranial portion of the DBS lead on the heating was investigated by looping the extra-cranial lead on the top, side, and back of the head; and placing it parallel to the coil’s longitudinal axial direction. The heating was induced using a 641 s long turbo spin echo sequence with the mean whole head average SAR of 3.16 W/kg. Temperatures were measured using fluoroptic probes at the scalp, first and second electrodes from the distal lead tip, and 6 mm distal from electrode 1 (T<sub>6mm</sub>). The heating was modeled using the maximum T<sub>6mm</sub> and imaged using a proton resonance frequency shift based MR thermometry method. Results showed that the heating was significantly reduced when the extra-cranial lead was placed in the longitudinal direction compared to the other placements (peak temperature change = 1.5–3.2 °C vs 5.1–24.7 °C). Thermal modeling and MR thermometry may be used together to determine the heating and improve patient safety online.</p></div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Abosch, Aviva" sort="Abosch, Aviva" uniqKey="Abosch A" first="Aviva" last="Abosch">Aviva Abosch</name><name sortKey="Delabarre, Lance" sort="Delabarre, Lance" uniqKey="Delabarre L" first="Lance" last="Delabarre">Lance Delabarre</name><name sortKey="Goerke, Ute" sort="Goerke, Ute" uniqKey="Goerke U" first="Ute" last="Goerke">Ute Goerke</name><name sortKey="Harel, Noam" sort="Harel, Noam" uniqKey="Harel N" first="Noam" last="Harel">Noam Harel</name><name sortKey="Hughes, John" sort="Hughes, John" uniqKey="Hughes J" first="John" last="Hughes">John Hughes</name><name sortKey="Shrivastava, Devashish" sort="Shrivastava, Devashish" uniqKey="Shrivastava D" first="Devashish" last="Shrivastava">Devashish Shrivastava</name><name sortKey="Vaughan, J Thomas" sort="Vaughan, J Thomas" uniqKey="Vaughan J" first="J. Thomas" last="Vaughan">J. Thomas Vaughan</name><name sortKey="Visaria, Rachana" sort="Visaria, Rachana" uniqKey="Visaria R" first="Rachana" last="Visaria">Rachana Visaria</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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