Volume 74, Issue 5 pp. 1257-1265
Full paper

Doppler ultrasound compared with electrocardiogram and pulse oximetry cardiac triggering: A pilot study

Fabian Kording

Corresponding Author

Fabian Kording

University Medical Centre Hamburg-Eppendorf, Centre for Radiology and Endoscopy, Department of Diagnostic and Interventional Radiology, Germany

Correspondence to: Fabian Kording, Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany. E-mail: [email protected]Search for more papers by this author
Bjoern Schoennagel

Bjoern Schoennagel

University Medical Centre Hamburg-Eppendorf, Centre for Radiology and Endoscopy, Department of Diagnostic and Interventional Radiology, Germany

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Gunnar Lund

Gunnar Lund

University Medical Centre Hamburg-Eppendorf, Centre for Radiology and Endoscopy, Department of Diagnostic and Interventional Radiology, Germany

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Friedrich Ueberle

Friedrich Ueberle

Hamburg University of Applied Sciences, Hamburg, Germany

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Caroline Jung

Caroline Jung

University Medical Centre Hamburg-Eppendorf, Centre for Radiology and Endoscopy, Department of Diagnostic and Interventional Radiology, Germany

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Gerhard Adam

Gerhard Adam

University Medical Centre Hamburg-Eppendorf, Centre for Radiology and Endoscopy, Department of Diagnostic and Interventional Radiology, Germany

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Jin Yamamura

Jin Yamamura

University Medical Centre Hamburg-Eppendorf, Centre for Radiology and Endoscopy, Department of Diagnostic and Interventional Radiology, Germany

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First published: 30 October 2014
Citations: 31

Abstract

Purpose

Accurate triggering of the cardiac cycle is mandatory for optimal image acquisition and thus diagnostic quality in cardiac magnetic resonance imaging. The purpose of this work was to evaluate Doppler ultrasound as an alternative trigger method in cardiac MRI.

Methods

Steady-state free precession (SSFP) 2D cine CMR was performed in 11 healthy subjects at 1.5T. Doppler ultrasound (DUS), electrocardiogram (ECG) and pulse oximetry (POX) were used for cardiac triggering. DUS peak detection was verified in comparison to ECG. Quantitative analysis of image quality of each gating method was determined by calculating endocardial border sharpness (EBS) and left ventricular (LV) function parameters and compared with ECG.

Results

Mean difference between DUS and ECG in detected RR intervals was 0.04 ± 63 ms (r = 0.96). Trigger jitter was not different between ECG and DUS (P = 0.15) but significant different between ECG and POX (P = 0.01). EBS was similar between each method (3.1 ± 0.2 / 2.6 ± 0.2 / 2.9 ± 0.2 pixel). Mean differences in stroke volume were not significantly different with −1 ± 7 mL (ECG/DUS, P = 0.9) and 2 ± 10 mL (ECG/POX, P = 0.8).

Conclusion

Cine cardiac MRI using DUS was successfully demonstrated. DUS triggering is an alternative method for cardiac MRI and may be applied in a clinical setting. Magn Reson Med 74:1257–1265, 2015. © 2014 Wiley Periodicals, Inc.

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