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US 6,333,971 B2Granted
Fiducial marker
AssigneeGeorge S. Allen
InventorsJennifer J. McCrory, J. Michael Fitzpatrick, M. Robert Willcott, Robert J. Maciunas, Calvin R. Maurer, Jr., George S. Allen
Life of this patent
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Abstract
An implantable fiducial marker having a sealed cavity for the introduction of an imaging agent that provides imaging capability in several modes, including Computed Tomographic imaging (CT) and Magnetic Resonance Imaging (MRI) is disclosed. The marker may be permanent, or it may be temporary and readily detachable from its anchor site. Combinations or agents imageable under CT scanning are combined with agents imageable under MRI scanning.
Claims23
A fiducial marker system, comprising:
- a) a base adapted to be affixed to the anatomy;
- and
- b) a fiducial marker adapted to be releasably attached to the base, the fiducial marker further comprising an imaging agent imageable in both X-ray computed tomography (CT) images and magnetic resonance (MR) images;
- c) wherein the imaging agent does not cause image distortion or artifacts in CT images;
- and
- d) wherein the imaging agent does not cause image distortion or artifacts in MR images.
3 more elements
A fiducial marker, comprising:
- a) a housing adapted to contain an imaging agent;
- and
- b) an imaging agent contained within the housing, wherein the imaging agent is imageable in both X-ray computed tomography (CT) images and magnetic resonance (MR) images;
- c) wherein the imaging agent does not cause image distortion or artifacts in CT images;
- and
- d) wherein the imaging agent does not cause image distortion or artifacts in MR images.
3 more elements
Dependencies are inferred from the claim text.