Low dose pedal magnetic resonance angiography at 3 tesla with time-resolved imaging of contrast kinetics: A feasibility study

Suvranu Ganguli, Ivan Pedrosa, Martin P. Smith, Eric R. Niendorf, Scott Fredericks, Neil M. Rofsky

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Objectives: To assess the feasibility of low-dose time-resolved imaging of contrast kinetics (TRICKS) magnetic resonance (MR) angiography of the pedal vasculature at 3.0 Tesla (T) using a head coil. Materials and methods: Eleven healthy volunteers were imaged using TRICKS MR angiography at 3.0 T with both feet positioned in a head coil. A dose of 7 mL was used for each of 3 acquisitions: images were obtained of each foot in the sagittal plane, and then both feet were imaged simultaneously in the transverse plane. The following parameters were used for acquisition: (TR/TE 4.7 milliseconds/ 1.3 milliseconds, field of view ≤ 28 cm, Flip angle ≤ 30 degrees, 384 ×256 matrix, section thickness ≤ 1.6 mm, Bandwidth ≤ 19.23). The dorsalis pedis, plantar arch, distal posterior tibial, lateral tarsal, and medial plantar arteries were graded for visualization, artifact, and overall image quality on a 4-point scale (1 ≤ worst; 4 ≤ best). Results: Superior visualization trended towards separate sagittal acquisitions when compared with that of bilateral transverse acquisitions for most of the individual vessels of the foot. Overall, separate sagittal acquisitions (average score ≤ 2.9) were superior to bilateral transverse acquisitions (average score ≤ 2.6). The average image quality score reflecting the amount of artifact was 2.6 for studies obtained using bilateral transverse acquisitions and 3.1 for studies obtained using separate sagittal acquisitions. Conclusion: Low-dose gadolinium multi-injection TRICKS and bolus-chase MR angiography at 3.0 T provides an effective and easily reproducible technique for imaging of the pedal vasculature in volunteers and has great potential for clinical application.

Original languageEnglish (US)
Pages (from-to)650-655
Number of pages6
JournalInvestigative Radiology
Volume43
Issue number9
DOIs
StatePublished - Sep 1 2008

Keywords

  • 3 Tesla
  • MR angiography
  • Pedal angiographic imaging
  • Pedal vasculature
  • Time-resolved imaging of contrast kinetics (TRICKS)

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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