High-resolution gadolinium-enhanced 3D MRA of the infrapopliteal arteries: Lessons for improving bolus-chase peripheral MRA

Maureen N. Hood, Vincent B. Ho, Thomas K F Foo, Hani B. Marcos, Sandra L. Hess, Peter L. Choyke

Research output: Contribution to journalArticle

Abstract

Peripheral magnetic resonance angiography (MRA) is growing in use. However, methods of performing peripheral MRA vary widely and continue to be optimized, especially for improvement in illustration of infrapopliteal arteries. The main purpose of this project was to identify imaging factors that can improve arterial visualization in the lower leg using bolus chase peripheral MRA. Eighteen healthy adults were imaged on a 1.5T MR scanner. The calf was imaged using conventional three-station bolus chase three-dimensional (3D) MRA, two dimensional (2D) time-of-flight (TOF) MRA and single-station Gadolinium (Gd)-enhanced 3D MRA. Observer comparisons of vessel visualization, signal to noise ratios (SNR), contrast to noise ratios (CNR) and spatial resolution comparisons were performed. Arterial SNR and CNR were similar for all three techniques. However, arterial visualization was dramatically improved on dedicated, arterial-phase Gd-enhanced 3D MRA compared with the multi-station bolus chase MRA and 2D TOF MRA. This improvement was related to optimization of Gd-enhanced 3D MRA parameters (fast injection rate of 2 mL/sec, high spatial resolution imaging, the use of dedicated phased array coils, elliptical centric k-space sampling and accurate arterial phase timing for image acquisition). The visualization of the infrapopliteal arteries can be substantially improved in bolus chase peripheral MRA if voxel size, contrast delivery, and central k-space data acquisition for arterial enhancement are optimized. Improvements in peripheral MRA should be directed at these parameters.

Original languageEnglish (US)
Pages (from-to)543-549
Number of pages7
JournalMagnetic Resonance Imaging
Volume20
Issue number7
DOIs
StatePublished - Sep 2002
Externally publishedYes

Keywords

  • Contrast media
  • Gadolinium
  • Magnetic resonance angiography
  • Magnetic resonance imaging
  • Peripheral arteries

ASJC Scopus subject areas

  • Biophysics
  • Clinical Biochemistry
  • Structural Biology
  • Radiology Nuclear Medicine and imaging
  • Condensed Matter Physics

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