Influence of the trigger technique on ventricular function measurements using 3-Tesla magnetic resonance imaging: comparison of ECG versus pulse wave triggering

Sievers, Burkhard; Wiesner, Marco; Kiria, Nana; Speiser, Uwe; Schoen, Steffen; Strasser, Ruth H.

doi:10.1258/ar.2011.100505

Cited by 17 publications

(24 citation statements)

References 34 publications

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“…Finally, the small number of examined volunteers may not allow drawing general conclusions. The reported influence of the MHD effect on ECG triggering by Sievers et al 5 could not be verified in this study. One reason may be the small study group with only healthy volunteers.…”

Section: Discussioncontrasting

confidence: 77%

“… 23 However, R-wave mis-registration with resulting cardiac motion artifacts was reported to occur in up to 30% at 7T 15 and even hampered CMR examination in 35% of patients at 3T. 5 Although the MHD effect was present in 72% of all examinations ( Fig. 1 ), the trigger quality of ECG was not significantly different compared to DUS and POX.…”

Section: Discussionmentioning

confidence: 95%

“…Although the POX trigger occurs only shortly (40–60 msec) after the DUS trigger, no decrease of diastolic EB was apparent. This may be due to the broad shape of the POX signal where the peak is more difficult to define 5 and thus revealed higher variations in cardiac cycle length and therefore increased EB compared to DUS.…”

Section: Discussionmentioning

confidence: 99%

“…However, ECG signal disturbances with incorrect trigger are reported to occur in up to 35% of patients undergoing high-field CMR. 5 With higher magnetic field strengths distortion of ECG signals with incorrect R-wave detection are mainly caused by gradients, radiofrequency (RF)-pulses, and also the magnetohydrodynamic (MHD) effect that occurs when a conductive fluid such as blood travels through a magnetic field. This flow-induced voltage is perpendicular to the magnetic field and blood flow direction and superimposes the ECG signal.…”

Section: Introductionmentioning

confidence: 99%

“…Strategies that are not affected by the MHD effect include techniques such as pulse oximetry (POX), self-gating, and acoustic phonocardiography. 5 , 12 – 17 …”

Section: Introductionmentioning

confidence: 99%

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Doppler Ultrasound Triggering for Cardiovascular MRI at 3T in a Healthy Volunteer Study

et al. 2017

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Purpose:Electrocardiogram (ECG) triggering for cardiac magnetic resonance (CMR) may be influenced by electromagnetic interferences with increasing magnetic field strength. The aim of this study was to evaluate the performance of Doppler ultrasound (DUS) as an alternative trigger technique for CMR in comparison to ECG and pulse oximetry (POX) at 3T and using different sequence types.Methods:Balanced turbo field echo two-dimensional (2D) short axis cine CMR and 2D phase-contrast angiography of the ascending aorta was performed in 11 healthy volunteers at 3T using ECG, DUS, and POX for cardiac triggering. DUS and POX triggering were compared to the reference standard of ECG in terms of trigger quality (trigger detection and temporal variability), image quality [endocardial blurring (EB)], and functional measurements [left ventricular (LV) volumetry and aortic blood flow velocimetry].Results:Trigger signal detection and temporal variability did not differ significantly between ECG/DUS (I = 0.6) and ECG/POX (P = 0.4). Averaged EB was similar for ECG, DUS, and POX (pECG/DUS = 0.4, pECG/POX = 0.9). Diastolic EB was significantly decreased for DUS in comparison to ECG (P = 0.02) and POX (P = 0.04). The LV function assessment and aortic blood flow were not significantly different.Conclusion:This study demonstrated the feasibility of DUS for gating human CMR at 3T. The magnetohydrodynamic effect did not significantly disturb ECG triggering in this small healthy volunteer study. DUS showed a significant improvement in diastolic EB but could not be identified as a superior trigger method. The potential benefit of DUS has to be evaluated in a larger clinical patient population.

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Section: Discussioncontrasting

confidence: 77%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Strategies that are not affected by the MHD effect include techniques such as pulse oximetry (POX), self-gating, and acoustic phonocardiography. 5 , 12 – 17 …”

Section: Introductionmentioning

confidence: 99%

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Doppler Ultrasound Triggering for Cardiovascular MRI at 3T in a Healthy Volunteer Study

et al. 2017

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Estimation of the timing of carotid artery flow using peripheral pulse wave‐gated MRI

Fushimi¹,

Okada²,

Yamamoto³

et al. 2012

Magnetic Resonance Imaging

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Free‐breathing, non‐ECG, simultaneous myocardial T₁, T₂, T₂*, and fat‐fraction mapping with motion‐resolved cardiovascular MR multitasking

Cao

Wang

Kwan

et al. 2022

Magnetic Resonance in Med

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Purpose To develop a free‐breathing, non‐electrocardiogram technique for simultaneous myocardial T1, T2, T2*, and fat‐fraction (FF) mapping in a single scan. Methods The MR Multitasking framework is adapted to quantify T1, T2, T2*, and FF simultaneously. A variable TR scheme is developed to preserve temporal resolution and imaging efficiency. The underlying high‐dimensional image is modeled as a low‐rank tensor, which allows accelerated acquisition and efficient reconstruction. The accuracy and/or repeatability of the technique were evaluated on static and motion phantoms, 12 healthy volunteers, and 3 patients by comparing to the reference techniques. Results In static and motion phantoms, T1/T2/T2*/FF measurements showed substantial consistency (R > 0.98) and excellent agreement (intraclass correlation coefficient > 0.93) with reference measurements. In human subjects, the proposed technique yielded repeatable T1, T2, T2*, and FF measurements that agreed with those from references. Conclusions The proposed free‐breathing, non‐electrocardiogram, motion‐resolved Multitasking technique allows simultaneous quantification of myocardial T1, T2, T2*, and FF in a single 2.5‐min scan.

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Influence of the trigger technique on ventricular function measurements using 3-Tesla magnetic resonance imaging: comparison of ECG versus pulse wave triggering

Abstract: Short-axis cine imaging for LV-function assessment can accurately be performed using PW triggering on 3T magnets, and may be used in clinical practice when ECG triggering is disturbed.

Cited by 17 publications

References 34 publications

Doppler Ultrasound Triggering for Cardiovascular MRI at 3T in a Healthy Volunteer Study

Doppler Ultrasound Triggering for Cardiovascular MRI at 3T in a Healthy Volunteer Study

Estimation of the timing of carotid artery flow using peripheral pulse wave‐gated MRI

Free‐breathing, non‐ECG, simultaneous myocardial T₁, T₂, T₂*, and fat‐fraction mapping with motion‐resolved cardiovascular MR multitasking

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Influence of the trigger technique on ventricular function measurements using 3-Tesla magnetic resonance imaging: comparison of ECG versus pulse wave triggering

Abstract: Short-axis cine imaging for LV-function assessment can accurately be performed using PW triggering on 3T magnets, and may be used in clinical practice when ECG triggering is disturbed.

Cited by 17 publications

References 34 publications

Doppler Ultrasound Triggering for Cardiovascular MRI at 3T in a Healthy Volunteer Study

Doppler Ultrasound Triggering for Cardiovascular MRI at 3T in a Healthy Volunteer Study

Estimation of the timing of carotid artery flow using peripheral pulse wave‐gated MRI

Free‐breathing, non‐ECG, simultaneous myocardial T1, T2, T2*, and fat‐fraction mapping with motion‐resolved cardiovascular MR multitasking

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Product

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Free‐breathing, non‐ECG, simultaneous myocardial T₁, T₂, T₂*, and fat‐fraction mapping with motion‐resolved cardiovascular MR multitasking