Dual-velocity continuously moving table acquisition for contrast-enhanced peripheral magnetic resonance angiography

David G. Kruger, Stephen J. Riederer, Jason A. Polzin, Ananth J. Madhuranthakam, Houchun H. Hu, James F. Glockner

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Acquisition of MR angiographic data of the peripheral vasculature during continuous table motion offers certain advantages over fixed station approaches, such as the elimination of wasted time moving between stations and the ability to form a seamless image of the extended field of view. However, it has recently been demonstrated that there is an approximate two-fold reduction in contrast bolus velocity as it moves from the thighs to the calves. This can potentially cause a mismatch of the moving table with the contrast peak, resulting in the table outpacing the contrast bolus distally. In this work we describe a modification to the continuous table motion technique allowing two table velocities: a high (ca. 3.6 cm/sec) velocity from the abdomen to the thighs and a low (ca. 1.6 cm/sec) velocity distally. Implications of the nonconstant velocity on k-space sampling are described, and it is shown that lateral resolution is improved for the low-velocity region. Correction for table deceleration during the transition time between high and low velocities is demonstrated. Contrast-enhanced studies in 15 volunteers are free of table-motion-related artifact and suggest improved depiction of the contrast bolus distally.

Original languageEnglish (US)
Pages (from-to)110-117
Number of pages8
JournalMagnetic resonance in medicine
Volume53
Issue number1
DOIs
StatePublished - Jan 1 2005

Keywords

  • Contrast-enhanced MRA
  • Moving table MRI
  • Peripheral MR angiography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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