Correction for heart rate variability during 3D whole heart MR coronary angiography

Stijntje D. Roes, Grigorios Korosoglou, Michael Schär, Jos J. Westenberg, Matthias J.P. Van Osch, Albert De Roos, Matthias Stuber

Research output: Contribution to journalArticle

Abstract

Purpose: To evaluate the effect of a real-time adaptive trigger delay on image quality to correct for heart rate variability in 3D whole-heart coronary MR angiography (MRA). Materials and Methods: Twelve healthy adults underwent 3D whole-heart coronary MRA with and without the use of an adaptive trigger delay. The moment of minimal coronary artery motion was visually determined on a high temporal resolution MRI. Throughout the scan performed without adaptive trigger delay, trigger delay was kept constant, whereas during the scan performed with adaptive trigger delay, trigger delay was continuously updated after each RR-interval using physiological modeling. Signal-to-noise, contrast-to-noise, vessel length, vessel sharpness, and subjective image quality were compared in a blinded manner. Results: Vessel sharpness improved significantly for the middle segment of the right coronary artery (RCA) with the use of the adaptive trigger delay (52.3 ± 7.1% versus 48.9 ± 7.9%, P = 0.026). Subjective image quality was significantly better in the middle segments of the RCA and left anterior descending artery (LAD) when the scan was performed with adaptive trigger delay compared to constant trigger delay. Conclusion: Our results demonstrate that the use of an adaptive trigger delay to correct for heart rate variability improves image quality mainly in the middle segments of the RCA and LAD.

Original languageEnglish (US)
Pages (from-to)1046-1053
Number of pages8
JournalJournal of Magnetic Resonance Imaging
Volume27
Issue number5
DOIs
StatePublished - May 2008

Keywords

  • Coronary angiography
  • Coronary artery motion
  • Heart rate variability
  • Magnetic resonance imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Correction for heart rate variability during 3D whole heart MR coronary angiography'. Together they form a unique fingerprint.

Cite this