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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