Two-dimensional coronary MR angiography without breath holding

John N. Oshinski, Lennart Hofland, Srinivasan Mukundan, W. Thomas Dixon, W. James Parks, Roderic I. Pettigrew

Research output: Contribution to journalArticle

145 Scopus citations

Abstract

PURPOSE: To determine whether breath holding can be eliminated in two- dimensional magnetic resonance (MR) imaging of the coronary arteries by using real-time respiratory gating. MATERIALS AND METHODS: Thirty-one subjects (20 healthy volunteers, 11 patients) underwent MR imaging. In 13 subjects, a respiratory monitoring belt was used, and in 18 subjects, a navigator echo was used. MR imaging was performed with breath holding, respiratory gating, and respiratory gating with two signals acquired. Three reviewers conducted a blinded review of the images, and overall image quality was rated on a scale from 1 (poor) to 5 (excellent). RESULTS: Respiratory gating with two signals acquired provided image quality superior to that with breath-hold imaging (3.7 vs 3.0, respectively; P < .05). Measurements of signal-to-noise ratio (14.5 for respiratory gating with two signals acquired and 11.9 for breath holding) supported the results of the image review. Navigator-echo gating provided better image quality than the monitoring belt (3.7 vs 3.1, respectively; P < .05). CONCLUSION: Breath holding may be eliminated by gating image acquisition to a real-time monitor of respiratory position. Respiratory gating enables improved resolution by means of acquisition of multiple signals, provides aligned sections of coronary arteries, and improves patient tolerance.

Original languageEnglish (US)
Pages (from-to)737-743
Number of pages7
JournalRadiology
Volume201
Issue number3
DOIs
StatePublished - Jan 1 1996

Keywords

  • Coronary vessels, MR
  • Magnetic resonance (MR), motion correction
  • Magnetic resonance (MR), vascular studies

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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