MRI safety aspects and artifacts of atrial septal defect and patent foramen ovale occluders at 1.5 tesla: a phantom study

RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
M BockW Semmler

Abstract

To investigate the magnetic resonance safety and magnetic resonance artifact intensities of patent foramen ovale and atrial septal occluders in a phantom study. Seven different commercial occluder models (Amplatzer ASD, Angel Wing ASD, Helex Septal Occluder, Cardia PFO-Star Generation I & III, Sideris Buttoned Device, Starflex ASD) were tested in a 1.5 Tesla whole-body MR scanner. Following a deflection test, the non-magnetic devices were imaged using different MRI pulse sequences including conventional spin echo, spoiled gradient echo as well as fast refocused steady-state pulse sequences (trueFISP) commonly used for cardiac MRI. Additionally, device temperatures were measured in the MR scanner during two imaging protocols (trueFISP, HASTE) with an MR-compatible fiber-optical thermometer. One ferromagnetic device (Sideris Buttoned Device) did not pass the deflection test and was excluded from further experiments. For typical cardiac imaging protocols, the remaining non-ferromagnetic devices showed only minor image artifacts with artifact sizes not exceeding 2 mm next to a strut. Heating was not observed in the devices. Non-ferromagnetic occluder models used in this study can safely be imaged with typical cardiac MRI protocols ...Continue Reading

Citations

May 19, 2010·Circulation·UNKNOWN American College of Cardiology Foundation Task Force on Expert Consensus DocumentsPamela K Woodard
Jul 6, 2011·Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance·Oliver K MohrsHans-Ulrich Kauczor
Mar 17, 2007·Current Cardiology Reports·Edward T Martin, David A Sandler
Jun 21, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Simon ReissMichael Bock

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