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Table 2 Nitinol guidewire heating in vivo

From: Positive contrast spiral imaging for visualization of commercial nitinol guidewires with reduced heating

 

Wire + Catheter

Wire 10 cm distal to catheter

 

Sheath

Aorta

Arch

Sheath

Aorta

Arch

Cartesian bSSFP (flip = 60°, TR = 2.86 ms)

4.34 °C

0.18 °C

0.14 °C

0.22 °C

0.13 °C

0.05 °C

Cartesian bSSFP (flip = 45°, TR = 2.86 ms)

2.50 °C

0.08 °C

0.10 °C

0.17 °C

0.09 °C

0.04 °C

Spiral GRE (16 interleaves, flip = 10°, TR = 5.16 ms)

0.09 °C

−0.04 °C

0.01 °C

−0.02 °C

−0.02 °C

0.00 °C

Spiral GRE (8 interleaves, flip = 10°, TR = 8.60 ms)

0.06 °C

0.04 °C

0.06 °C

0.00 °C

0.03 °C

0.03 °C

  1. In vivo temperature increase from baseline observed during 2 minutes of continuous imaging measured at the tip of the nitinol guidewire. Temperature was measured with the guidewire tip in the introducer sheath, in the aorta and at the aortic arch in a 60 kg swine
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Journal of Cardiovascular Magnetic Resonance

ISSN: 1532-429X

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