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Abstract #1662

Variable Echotimes in Radial Acquisitions to Achieve a Uniform Artifact for Passive MR Guidewires

Axel Joachim Krafft 1,2 , Simon Rei 1 , Klaus Duering 3 , and Michael Bock 1

1 Radiology - Medical Physics, University Medical Center Freiburg, Freiburg, Germany, 2 German Cancer Consortium (DKTK), Heidelberg, Germany, 3 MaRVis Medical GmbH, Hannover, Germany

Recently, dedicated passive MR-compatible guidewires were introduced that employ embedded iron particles to generate a local artifact for device visualization. The generated artifact depends in particular on the echo time (TE) and on the orientation of the guidewire marker relatively to the main magnetic field. In conventional gradient-echo imaging, the guidewire exhibits a wide artifact for orientations perpendicular to the main magnetic field and a narrow one parallel to it. Here, we present a radial acquisition scheme to realize a uniform, orientation-independent artifact for improved guidewire visualization.

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