Medical image guidance marker
AssigneeKyoto Prefectural Public University Corporation
InventorsKoji Okihara, Osamu Ukimura
Life of this patent
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Abstract
A medical image guidance marker to be placed in a biological tissue for tomographic image guidance, wherein the medical image guidance marker is made of an alloy with a magnetic susceptibility of −13 ppm to −5 ppm and has a shape of a coil, the coil is formed of a wire with a wire diameter of not less than 0.15 mm and not more than 0.45 mm and has a coil diameter of not less than 0.55 mm and not more than 1.20 mm, and the pitch of the coil is not less than 0.3 mm and not more than 1.5 mm and is not less than 1.8 times and not more than 4 times the wire diameter.
Claims9
A medical image guidance marker to be placed in a biological tissue for tomographic image guidance, wherein the medical image guidance marker comprises:
- a coil made of an alloy with a magnetic susceptibility of −13 ppm to −5 ppm,
- the coil is formed of a wire with a wire diameter of not less than 0.15 mm and not more than 0.45 mm and has a coil diameter of not less than 0.55 mm and not more than 1.20 mm, and
- the pitch of the coil is not less than 0.3 mm and not more than 1.5 mm and is not less than 1.8 times and not more than 4 times the wire diameter;
- wherein the coil is configured such that adjacent wire turns are not in contact with each other and a gap is present between adjacent wire turns.
Dependencies are inferred from the claim text.