A rapid 2D time-resolved variable-rate k-space sampling MR technique for passive catheter tracking during endovascular procedures

Magn Reson Med. 1998 Sep;40(3):356-62. doi: 10.1002/mrm.1910400304.


A new, fast, 2D MR imaging technique allowing passive catheter visualization adequate for use as a tool for guiding the movement of a catheter during endovascular procedures is described. This imaging technique samples low spatial frequencies more often than high spatial frequencies; it also uses both k-space view sharing and temporal interpolation. Unlike other techniques for passive visualization that exploit magnetic-susceptibility-induced artifacts, we have adopted a strategy that takes advantage of the T1-shortening effect of paramagnetic contrast agents, such as Gd-DTPA and a projection dephaser. This not only permits visualization of the entire catheter length but also minimizes the risk of intravascular heating. Using this method, a temporal frame rate of up to eight images per second and a tip localization accuracy of +/- 1mm (root mean square difference) can be achieved.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Angioplasty, Balloon / instrumentation*
  • Animals
  • Aorta / pathology
  • Carotid Arteries / pathology
  • Catheterization, Central Venous / instrumentation*
  • Catheterization, Peripheral / instrumentation*
  • Contrast Media
  • Dogs
  • Gadolinium DTPA
  • Humans
  • Image Enhancement
  • Magnetic Resonance Imaging* / instrumentation*
  • Phantoms, Imaging*


  • Contrast Media
  • Gadolinium DTPA