ArticleJournal of magnetic resonance imaging : JMRI2012
Active delivery cable tuned to device deployment state: enhanced visibility of nitinol occluders during preclinical interventional MRI.
Article in Journal of magnetic resonance imaging : JMRI, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 6 citations in OpenAlex.
- Improved passive catheter tracking with positive contrast for CMR-guided cardiac catheterization using partial saturation (pSAT).Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance · 2017Article
- MRI catheterization in cardiopulmonary disease.Chest · 2014Article
- Transthoracic delivery of large devices into the left ventricle through the right ventricle and interventricular septum: preclinical feasibility.Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance · 2013Article
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Authors and funding
10 authors at 3 institutions in 1 country.
Funding
Abstract
purposeTo develop an active delivery system that enhances visualization of nitinol cardiac occluder devices during deployment under real-time magnetic resonance imaging (MRI). MATERIALS AND
methodsWe constructed an active delivery cable incorporating a loopless antenna and a custom titanium microscrew to secure the occluder devices. The delivery cable was tuned and matched to 50Ω at 64 MHz with the occluder device attached. We used real-time balanced steady state free precession in a wide-bore 1.5T scanner. Device-related images were reconstructed separately and combined with surface-coil images. The delivery cable was tested in vitro in a phantom and in vivo in swine using a variety of nitinol cardiac occluder devices.
resultsIn vitro, the active delivery cable provided little signal when the occluder device was detached and maximal signal with the device attached. In vivo, signal from the active delivery cable enabled clear visualization of occluder device during positioning and deployment. Device release resulted in decreased signal from the active cable. Postmortem examination confirmed proper device placement.
conclusionThe active delivery cable enhanced the MRI depiction of nitinol cardiac occluder devices during positioning and deployment, both in conventional and novel applications. We expect enhanced visibility to contribute to the effectiveness and safety of new and emerging MRI-guided treatments.
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