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In vitro assessment of MRI issues at 3-Tesla for a breast tissue expander with a remote port.

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Title: In vitro assessment of MRI issues at 3-Tesla for a breast tissue expander with a remote port.
Authors: Linnemeyer, Hannah1 hlinneme@lion.lmu.edu, Shellock, Frank G.2 Frank.Shellock@gte.net, Ahn, Christina Y.3 cahnmd@gmail.com
Source: Magnetic Resonance Imaging (0730725X). Apr2014, Vol. 32 Issue 3, p297-302. 6p.
Subjects: In vitro studies, Magnetic resonance mammography, Breast disease diagnosis, Breast diseases, Medical artifacts, Magnetic fields, Patients
Abstract: Abstract: Objectives: A patient with a breast tissue expander may require a diagnostic assessment using magnetic resonance imaging (MRI). To ensure patient safety, this type of implant must undergo in vitro MRI testing using proper techniques. Therefore, this investigation evaluated MRI issues (i.e., magnetic field interactions, heating, and artifacts) at 3-Tesla for a breast tissue expander with a remote port. Methods: A breast tissue expander with a remote port (Integra Breast Tissue Expander, Model 3612-06 with Standard Remote Port, PMT Corporation, Chanhassen, MN) underwent evaluation for magnetic field interactions (translational attraction and torque), MRI-related heating, and artifacts using standardized techniques. Heating was evaluated by placing the implant in a gelled-saline-filled phantom and MRI was performed using a transmit/receive RF body coil at an MR system reported, whole body averaged specific absorption rate of 2.9-W/kg. Artifacts were characterized using T1-weighted and GRE pulse sequences. Results: Magnetic field interactions were not substantial and, thus, will not pose a hazard to a patient in a 3-Tesla or less MRI environment. The highest temperature rise was 1.7°C, which is physiologically inconsequential. Artifacts were large in relation to the remote port and metal connector of the implant but will only present problems if the MR imaging area of interest is where these components are located. Conclusions: A patient with this breast tissue expander with a remote port may safely undergo MRI at 3-Tesla or less under the conditions used for this investigation. These findings are the first reported at 3-Tesla for a tissue expander. [Copyright &y& Elsevier]
Copyright of Magnetic Resonance Imaging (0730725X) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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PubType: Academic Journal
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  Data: In vitro assessment of MRI issues at 3-Tesla for a breast tissue expander with a remote port.
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  Data: <searchLink fieldCode="AR" term="%22Linnemeyer%2C+Hannah%22">Linnemeyer, Hannah</searchLink><relatesTo>1</relatesTo><i> hlinneme@lion.lmu.edu</i><br /><searchLink fieldCode="AR" term="%22Shellock%2C+Frank+G%2E%22">Shellock, Frank G.</searchLink><relatesTo>2</relatesTo><i> Frank.Shellock@gte.net</i><br /><searchLink fieldCode="AR" term="%22Ahn%2C+Christina+Y%2E%22">Ahn, Christina Y.</searchLink><relatesTo>3</relatesTo><i> cahnmd@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Magnetic+Resonance+Imaging+%280730725X%29%22">Magnetic Resonance Imaging (0730725X)</searchLink>. Apr2014, Vol. 32 Issue 3, p297-302. 6p.
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  Data: <searchLink fieldCode="DE" term="%22In+vitro+studies%22">In vitro studies</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+resonance+mammography%22">Magnetic resonance mammography</searchLink><br /><searchLink fieldCode="DE" term="%22Breast+disease+diagnosis%22">Breast disease diagnosis</searchLink><br /><searchLink fieldCode="DE" term="%22Breast+diseases%22">Breast diseases</searchLink><br /><searchLink fieldCode="DE" term="%22Medical+artifacts%22">Medical artifacts</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Patients%22">Patients</searchLink>
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  Data: Abstract: Objectives: A patient with a breast tissue expander may require a diagnostic assessment using magnetic resonance imaging (MRI). To ensure patient safety, this type of implant must undergo in vitro MRI testing using proper techniques. Therefore, this investigation evaluated MRI issues (i.e., magnetic field interactions, heating, and artifacts) at 3-Tesla for a breast tissue expander with a remote port. Methods: A breast tissue expander with a remote port (Integra Breast Tissue Expander, Model 3612-06 with Standard Remote Port, PMT Corporation, Chanhassen, MN) underwent evaluation for magnetic field interactions (translational attraction and torque), MRI-related heating, and artifacts using standardized techniques. Heating was evaluated by placing the implant in a gelled-saline-filled phantom and MRI was performed using a transmit/receive RF body coil at an MR system reported, whole body averaged specific absorption rate of 2.9-W/kg. Artifacts were characterized using T1-weighted and GRE pulse sequences. Results: Magnetic field interactions were not substantial and, thus, will not pose a hazard to a patient in a 3-Tesla or less MRI environment. The highest temperature rise was 1.7°C, which is physiologically inconsequential. Artifacts were large in relation to the remote port and metal connector of the implant but will only present problems if the MR imaging area of interest is where these components are located. Conclusions: A patient with this breast tissue expander with a remote port may safely undergo MRI at 3-Tesla or less under the conditions used for this investigation. These findings are the first reported at 3-Tesla for a tissue expander. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Magnetic Resonance Imaging (0730725X) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Breast disease diagnosis
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      – TitleFull: In vitro assessment of MRI issues at 3-Tesla for a breast tissue expander with a remote port.
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              Text: Apr2014
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