Method and apparatus for obtaining stereotactic mammographic guided needle breast biopsies
First Claim
Patent Images
1. An apparatus for performing stereotactic mammographic needle biopsies on a breast, the apparatus comprising:
- a base;
a pivot shaft having a first end attached to the base and a second end, the pivot shaft further defining a pivot axis;
an imaging arm having an X-ray source end and an X-ray receiving end, the imaging arm being attached to the second end of the pivot shaft at a point between the X-ray source end and the X-ray receiving end;
an X-ray tube having a focal spot, the X-ray tube being connected to the imaging arm at its X-ray source end;
an X-ray image receiver support affixed to the imaging arm at its X-ray receiving end;
an X-ray image receiver attached to the support; and
a removable needle biopsy apparatus further comprising;
a biopsy apparatus base having a first side, a second side and a compression plate engaging end,a compression plate attached to the biopsy apparatus base at the compression plate engaging end, the compression plate further defining a compression plate plane,a multi-dimensional positionable biopsy needle guiding stage attached to the biopsy apparatus base on its first side,a biopsy needle holder attached to the needle guiding stage,a compression paddle carriage slidably attached to the biopsy apparatus base on its first side between the biopsy needle guiding stage and the compression plate engaging end,a compression paddle, having an opening therein permitting a biopsy needle to be inserted into a breast, attached to the compression paddle carriage,a pivot member having first and second ends, wherein the first end of the pivot member is attached to the second side of the biopsy apparatus base near its compression plate engaging end, the pivot member allowing pivotal motion of the biopsy apparatus base relative to the imaging arm about the pivot axis defined by the pivot shaft; and
means for attaching the biopsy apparatus to the imaging arm, the means being affixed to the pivot member at its second end.
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Abstract
An add-on biopsy apparatus attached to a conventional mammography apparatus permits stereotactic imaging of a breast held in a mammographic position using an image receiver having a plane positioned perpendicular to the X-ray source. The perpendicularly positioned image plane allows the use of conventional moving scatter reducing grids to improve image contrast and quality of a stereotactic image made with an add-on biopsy apparatus. The biopsy apparatus also includes a control system for position a digital image receiver to compensate for image shifting during stereotactic imaging.
197 Citations
9 Claims
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1. An apparatus for performing stereotactic mammographic needle biopsies on a breast, the apparatus comprising:
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a base; a pivot shaft having a first end attached to the base and a second end, the pivot shaft further defining a pivot axis; an imaging arm having an X-ray source end and an X-ray receiving end, the imaging arm being attached to the second end of the pivot shaft at a point between the X-ray source end and the X-ray receiving end; an X-ray tube having a focal spot, the X-ray tube being connected to the imaging arm at its X-ray source end; an X-ray image receiver support affixed to the imaging arm at its X-ray receiving end; an X-ray image receiver attached to the support; and a removable needle biopsy apparatus further comprising; a biopsy apparatus base having a first side, a second side and a compression plate engaging end, a compression plate attached to the biopsy apparatus base at the compression plate engaging end, the compression plate further defining a compression plate plane, a multi-dimensional positionable biopsy needle guiding stage attached to the biopsy apparatus base on its first side, a biopsy needle holder attached to the needle guiding stage, a compression paddle carriage slidably attached to the biopsy apparatus base on its first side between the biopsy needle guiding stage and the compression plate engaging end, a compression paddle, having an opening therein permitting a biopsy needle to be inserted into a breast, attached to the compression paddle carriage, a pivot member having first and second ends, wherein the first end of the pivot member is attached to the second side of the biopsy apparatus base near its compression plate engaging end, the pivot member allowing pivotal motion of the biopsy apparatus base relative to the imaging arm about the pivot axis defined by the pivot shaft; and means for attaching the biopsy apparatus to the imaging arm, the means being affixed to the pivot member at its second end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A removable stereotactic needle biopsy apparatus for attachment to a mammography apparatus, the removable biopsy apparatus comprising:
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a biopsy apparatus base having a first side, a second side and a compression plate engaging end; a compression plate attached to the biopsy apparatus base at the compression plate engaging end; a biopsy needle guiding stage attached to the biopsy apparatus base on its first side; a biopsy needle holder attached to the needle guiding stage; a breast compression paddle carriage slidably attached to the biopsy apparatus base on its first side between the biopsy needle guiding stage and the compression paddle; a pivot member having a first and second end, wherein the first end of the pivot member is attached to the second side of the biopsy apparatus base near its compression plate engaging end, the pivot member allowing pivotal motion of the biopsy apparatus base relative to an imaging arm of a mammography apparatus about a pivot axis adjacent to the second end of the pivot member; and means for attaching the biopsy apparatus to an imaging arm of a mammography apparatus, the means being affixed to the pivot member at its second end.
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Specification