MRI visible medical device
OwnerHaroun Fridinventor
Life of this patent
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Abstract
Cobalt in oxidized state for use as anti-artifact layer (4) covering a metallic substrate (1) of a medical device for reducing the production of artifacts in MRI caused by the magnetic property of the (1), wherein the anti-artifact layer (4) is present at outermost surface of the metallic substrate (1) and has at least 30% of cobalt ratio (at % Co) to the total amount of transition metallic atoms present therein, and at least 90% of cobalt atoms present within the anti-artifact layer (4) are converted into at least one of Co(II) oxidized state and Co(III) oxidized state.
Claims18
A medical device comprising a metallic bulk layer as a metallic substrate comprising at least one of chromium and iron, and a cobalt-rich composition layered on an outermost surface of the metallic bulk layer,
- wherein within 10 nm from the external surface of the cobalt-rich composition:
- the cobalt-atomic percent (at %) is at least 50 at % to the total amount of chromium and/or iron atoms present in the metallic substrate;
- at least 90 at % of the cobalt atoms are oxidized into at least one of Co(II) and Co(III) oxidized state to the total amount of cobalt atoms;
- and
- at least 55 at % of the cobalt atoms are at least one of cobalt monoxide (CoO) and cobalt (II,III) oxide (CoO.Co2O3) to the total amount of cobalt atoms in oxidized state.
A method of providing a magnetic resonance (MR) image comprising performing imaging with a medical device comprising a metallic bulk layer as a metallic substrate comprising at least one of chromium and iron and a cobalt-rich composition as an anti-artifact layer that continuously covers a least one surface of the metallic substrate,
- wherein within 10 nm from the external surface of the cobalt-rich composition:
- the cobalt-atomic ratio to the total amount of chromium and iron atoms present in the metallic substrate is at least 50 at %;
- at least 90 at % of the cobalt atoms are in at least one of Co(II) oxidized state and Co(III) oxidized state to the total amount of cobalt atoms;
- at least 55 at % of the cobalt atoms are at least one of cobalt monoxide (CoO) and cobalt (HMI) oxide (CoO.Co2O3) to the total amount of cobalt atoms in oxidized state;
- and
- a production of artifacts in the magnetic resonance imaging (MM) caused by a ferro- or ferri-magnetic property of the metallic substrate is reduced compared to an MR image provided by the same medical device without the cobalt-rich composition layer.
Dependencies are inferred from the claim text.