Navigator gated high temporal resolution tissue phase mapping of myocardial motion

Bernd Jung*, Maxim Zaitsev, Jürgen Hennig, Michael Markl

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Data acquisition for phase contrast velocity mapping of myocardial motion is typically based on multiple breath-held 2D measurements with limited acquisition duration and consequently relatively poor temporal resolution. In order to overcome the limitations of breath-hold acquisitions, an improved navigator-guided technique was implemented based on 2 navigator signals within each cardiac cycle in combination with paired acceptance and rejection criteria of successive navigator signals. Respiratory gated phase contrast measurements with 3-directional velocity encoding were performed in 12 healthy volunteers in basal, midventricular, and apical locations of the left ventricle during free breathing with a temporal resolution of 13.8 ms. Results were compared to standard breath-hold measurements with a temporal resolution of 69 ms. Data from the high temporal resolution study revealed details in left ventricular motion patterns that were previously not seen in phase contrast measurements and are only known from echocardiography. The proposed navigator gated technique for high temporal resolution velocity mapping is, therefore, highly promising for the detection of local and global motion abnormalities in patients with disturbed left ventricular performance, such as diastolic dysfunction.

Original languageEnglish (US)
Pages (from-to)937-942
Number of pages6
JournalMagnetic resonance in medicine
Volume55
Issue number4
DOIs
StatePublished - Apr 2006

Keywords

  • Cardiac cine imaging
  • Cardiac function
  • Heart
  • Myocardial motion
  • Navigator echo phase contrast

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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