Sicherheit von nicht-aktiven kardiovaskulären Implantaten bei MRT-Untersuchungen – Update 2021

Knobelsdorff, Florian von; Bauer, Wolfgang R.; Busch, Sonia; Eitel, Ingo; Jensen, Christoph J; Neizel-Wittke, Mirja; Radunski, Ulf K; Schuster, Antonius; Rolf, Andreas

doi:10.1007/s12181-021-00474-9

Cited by 3 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The PT is a coherent, continuous RF signal produced by a commercial RF-synthesizer (ESG 1000A; Hewlett Packard, Palo Alto, CA) connected to an inhouse-built non-resonant antenna and transmitted into the bore of the MR scanner [25]. The used power for the PT generation is in the order of magnitude of the spin signal, and 8 orders of magnitude smaller than the average power of MR transmit pulses, which are limited according to the standard MR safety guidelines to 2 W/kg body weight [33]. Because the coil load of the receiver coils changes due to underlying physiological motion [34][35][36][37], the received intensity of the PT signal varies.…”

Section: Pilot Tonementioning

confidence: 99%

Pilot tone-based prospective correction of respiratory motion for free-breathing myocardial T1 mapping

Ludwig

Kerkering

Speier

et al. 2022

Magn Reson Mater Phy

View full text Add to dashboard Cite

Objective To provide respiratory motion correction for free-breathing myocardial T1 mapping using a pilot tone (PT) and a continuous golden-angle radial acquisition. Materials and methods During a 45 s prescan the PT is acquired together with a dynamic sagittal image covering multiple respiratory cycles. From these images, the respiratory heart motion in head-feet and anterior–posterior direction is estimated and two linear models are derived between the PT and heart motion. In the following scan through-plane motion is corrected prospectively with slice tracking based on the PT. In-plane motion is corrected for retrospectively. Our method was evaluated on a motion phantom and 11 healthy subjects. Results Non-motion corrected measurements using a moving phantom showed T1 errors of 14 ± 4% (p < 0.05) compared to a reference measurement. The proposed motion correction approach reduced this error to 3 ± 4% (p < 0.05). In vivo the respiratory motion led to an overestimation of T1 values by 26 ± 31% compared to breathhold T1 maps, which was successfully corrected to an average difference of 3 ± 2% (p < 0.05) between our free-breathing approach and breathhold data. Discussion Our proposed PT-based motion correction approach allows for T1 mapping during free-breathing with the same accuracy as a corresponding breathhold T1 mapping scan.

show abstract

Section: Pilot Tonementioning

confidence: 99%

Pilot tone-based prospective correction of respiratory motion for free-breathing myocardial T1 mapping

Ludwig

Kerkering

Speier

et al. 2022

Magn Reson Mater Phy

View full text Add to dashboard Cite

show abstract

“…Gerade das ist eine Kernkompetenz des Facharztes für Innere Medizin und Kardiologie, der nicht nur die Notwendigkeit einer speziellen Programmierung von Schrittmacher-und Defibrillatoraggregaten erkennt, sondern diese auch selbst durchführen kann. Unter Federführung der DGK sind zu dieser komplexen Thematik 2 Publikationen entstanden, die dem Kliniker einen Leitfaden an die Hand geben [13,14].…”

Section: Präambelunclassified

“…Für die Diagnostik ist für die CMR nicht nur die Qualität des EKG wichtig zur Akquise aussagekräftiger Bilddaten, sondern auch die Erkennung von Herzrhythmusstörungen vor der CMR-Untersuchung und insbesondere auch während der Durchführung von Stress-MRT-Untersuchungen. Beides ist essenzieller Bestandteil einer kardiologischen Weiterbildung inklusive der Programmierung von Schrittmacher und ICD/CRT-Devices, die mittlerweile schon seit vielen Jahren auch unter den entsprechenden Bedingungen [13,14] keine absolute Kontraindikation mehr für eine CMR-Untersuchung darstellen. Die Gabe von gadoliniumhaltigen Kontrastmitteln wird derzeit in Studien [19] untersucht und zum Wohle des Patienten der Gebrauch auch deutlich reduziert, bzw.…”

Section: Sichere Durchführung Der Kardiovaskulären Mrtunclassified

Kompetenz und Innovation in der kardiovaskulären MRT: Stellungnahme der Deutschen Gesellschaft für Kardiologie – Herz- und Kreislaufforschung

et al. 2021

View full text Add to dashboard Cite

Competence and innovation in cardiovascular MRI: statement of the German Cardiac SocietyThis statement of the German Cardiac Society (DGK) focusses on required cardiological competence levels in cardiovascular magnetic resonance imaging (CMR) and their impact on clinical management including diagnostics, procedural planning and treatment of patients in cardiology. There is plenty of both basic technical and clinical innovation based on research by German and European cardiologists with high clinical impact that have been included in national, European and international guidelines. This statement provides guidance on safe and competent performance of CMR examinations including the various applications. It also defines competence levels, which enable a high-quality execution of the examination and utilization of the derived information in the clinical arena.

show abstract

Radiological imaging in cardiac surgery

Scholz,

Ehmig,

Jebran

et al. 2024

Z Herz- Thorax- Gefäßchir

View full text Add to dashboard Cite

Sicherheit von nicht-aktiven kardiovaskulären Implantaten bei MRT-Untersuchungen – Update 2021

Cited by 3 publications

References 43 publications

Pilot tone-based prospective correction of respiratory motion for free-breathing myocardial T1 mapping

Pilot tone-based prospective correction of respiratory motion for free-breathing myocardial T1 mapping

Kompetenz und Innovation in der kardiovaskulären MRT: Stellungnahme der Deutschen Gesellschaft für Kardiologie – Herz- und Kreislaufforschung

Radiological imaging in cardiac surgery

Contact Info

Product

Resources

About