Respiratory self-gated four-dimensional coronary MR angiography

A feasibility study

Peng Lai, Andrew C. Larson, Jaeseok Park, James C. Carr, Debiao Li

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The four-dimensional (4D) coronary MR angiography (MRA) approach has been developed to eliminate the need for accurate determination of the acquisition window and trigger delay time. Diaphragm navigator (NAV) has been the conventional respiratory gating method for free-breathing coronary MRA. However, NAV echo acquisition interrupts the continuous radiofrequency pulse application required for 4D steady-state free precession coronary MRA. The objective of this work was to investigate the feasibility of a respiratory self-gating (RSG) technique for 4D coronary MRA and its effectiveness by comparing with retrospective NAV gating. Data were acquired continuously throughout the cardiac cycle and retrospectively remapped to cardiac phases based on the electrocardiogram signal simultaneously recorded. An RSG signal extracted from a direct measurement of the heart position was used for retrospective respiratory gating and motion correction. In seven healthy volunteers, 4D MRA images were reconstructed, allowing retrospective assessment of the cardiac motion of the coronary artery and selection of the images with the best vessel delineation. Statistical analysis shows that 4D RSG provides coronary artery delineation comparable to mid-diastole images acquired using NAV. Respiratory self-gating is an effective method for eliminating respiratory motion artifacts and allows 4D coronary MRA during free breathing.

Original languageEnglish
Pages (from-to)1378-1385
Number of pages8
JournalMagnetic Resonance in Medicine
Volume59
Issue number6
DOIs
Publication statusPublished - 2008 Jun 1
Externally publishedYes

Fingerprint

Feasibility Studies
Coronary Angiography
Coronary Vessels
Respiration
Diastole
Diaphragm
Artifacts
Healthy Volunteers
Angiography
Electrocardiography

Keywords

  • Coronary vessels
  • Motion correction
  • MR angiography
  • Respiratory gating

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Respiratory self-gated four-dimensional coronary MR angiography : A feasibility study. / Lai, Peng; Larson, Andrew C.; Park, Jaeseok; Carr, James C.; Li, Debiao.

In: Magnetic Resonance in Medicine, Vol. 59, No. 6, 01.06.2008, p. 1378-1385.

Research output: Contribution to journalArticle

Lai, Peng ; Larson, Andrew C. ; Park, Jaeseok ; Carr, James C. ; Li, Debiao. / Respiratory self-gated four-dimensional coronary MR angiography : A feasibility study. In: Magnetic Resonance in Medicine. 2008 ; Vol. 59, No. 6. pp. 1378-1385.
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