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August 1, 1999Radiology

Submillimeter Three-dimensional Coronary MR Angiography with Real-time Navigator Correction: Comparison of Navigator Locations

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Why the study?

Does a diaphragmatic navigator improve vessel delineation compared to a left ventricular navigator during three-dimensional free-breathing coronary magnetic resonance angiography in healthy volunteers?

Population

8 healthy volunteers

Comparison

Three-dimensional free-breathing coronary… vs Real-time navigator localized at the left…

Design

Cross-sectional

Authors

MSMatthias StuberCardiac ImagingRBRené M. BotnarCardiac ImagingPDPeter G. DaniasTufts University

Discussion

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Implication

May support diaphragmatic navigator preference in coronary MRA; hypothesis-generating in healthy volunteers, requiring patient validation.

Key Points

  • To determine whether real-time navigator correction positioned at the right hemidiaphragm or the left ventricle yields superior image quality during submillimeter 3D free-breathing coronary magnetic resonance angiography.
  • Performed 3D free-breathing coronary MR angiography in N=8 healthy volunteers.
  • Implemented real-time navigator technology localized at two sites: the right hemidiaphragm and the left ventricle.
  • Objectively compared the resulting images to evaluate coronary vessel delineation.
  • Diaphragmatic navigator placement provided superior image quality and vessel delineation compared to left ventricular placement.
  • Visualization improvements with the diaphragmatic navigator were specifically pronounced in the middle to distal segments of the coronary arteries.

Structured PICO

Does a diaphragmatic navigator improve vessel delineation compared to a left ventricular navigator during three-dimensional free-breathing coronary magnetic resonance angiography in healthy volunteers?

P
Population
8 healthy volunteers
I
Intervention
Three-dimensional free-breathing coronary magnetic resonance angiography with real-time navigator localized at the right hemidiaphragm
C
Comparator
Real-time navigator localized at the left ventricle
O
Outcome
Vessel delineation of middle to distal portions of the coronary arteriessurrogate

In 3D free-breathing coronary MRA, placing the real-time navigator at the right hemidiaphragm provides superior vessel delineation compared to the left ventricle.

Cite This Study

Stuber et al. (1999) studied this question.

synapsesocial.com/papers/6a1bfd09bc71fb1015a92599https://doi.org/10.1148/radiology.212.2.r99au50579

Topics

Coronary CT angiography
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 13D MR angiography of pulmonary arteries using realtime navigator gating and magnetization preparation1996 · 55 citations
  2. 2Proximal coronary artery stenosis: Three‐dimensional MRI with fat saturation and navigator echo1997 · 133 citations
  3. 3A Preliminary Report Comparing Magnetic Resonance Coronary Angiography with Conventional Angiography1993 · 546 citations
  4. 4Prospective adaptive navigator correction for breath‐hold MR coronary angiography1997 · 214 citations
  5. 5Comparison of respiratory suppression methods and navigator locations for MR coronary angiography.1997 · 235 citations