| Maintained functionality of an implantable radiotelemetric blood pressure and heart rate sensor after magnetic resonance imaging in rats. | |
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MedLine Citation:
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PMID: 22047995 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Radiotelemetric sensors for in vivo assessment of blood pressure and heart rate are widely used in animal research. MRI with implanted sensors is regarded as contraindicated as transmitter malfunction and injury of the animal may be caused. Moreover, artefacts are expected to compromise image evaluation. In vitro, the function of a radiotelemetric sensor (TA11PA-C10, Data Sciences International) after exposure to MRI up to 9.4 T was assessed. The magnetic force of the electromagnetic field on the sensor as well as radiofrequency (RF)-induced sensor heating was analysed. Finally, MRI with an implanted sensor was performed in a rat. Imaging artefacts were analysed at 3.0 and 9.4 T ex vivo and in vivo. Transmitted 24 h blood pressure and heart rate were compared before and after MRI to verify the integrity of the telemetric sensor. The function of the sensor was not altered by MRI up to 9.4 T. The maximum force exerted on the sensor was 273 ± 50 mN. RF-induced heating was ruled out. Artefacts impeded the assessment of the abdomen and thorax in a dead rat, but not of the head and neck. MRI with implanted radiotelemetric sensors is feasible in principal. The tested sensor maintains functionality up to 9.4 T. Artefacts hampered abdominal and throacic imaging in rats, while assessment of the head and neck is possible. |
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Authors:
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I Nölte; S Gorbey; H Boll; G Figueiredo; C Groden; B Lemmer; M A Brockmann |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-02 |
Journal Detail:
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Title: Physiological measurement Volume: 32 ISSN: 1361-6579 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9306921 Medline TA: Physiol Meas Country: - |
Other Details:
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Languages: ENG Pagination: 1941-1951 Citation Subset: - |
Affiliation:
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Department of Neuroradiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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