US 4,722,336 A · Placement guide

Abstract

A guide for locating a target object within a visually opaque but x-ray transparent object has a base creating a first reference plane. A vertical post extends upward from the base perpendicular to the first reference plane. First target sighting members, which are at least partially opaque to x-ray are mounted for movement relative to the vertical support member and provide for creating a line parallel to the reference plane through the target. A system is provided for aligning x-ray fluoroscope with the first target. A second target has two target sighting members, one on an arm above the target object and the other on an arm below the target object. The x-ray fluoroscope is aligned with these such that when the x-ray fluoroscope is projecting in a line parallel to the upright support and perpendicular to the reference plane, it extends through opaque sights and through the target. The distance from the second target to the upright support is measured, and the probe is mounted at a predetermined angle, the line of which extends through a point on the vertical post equal to the distance from the post to the second sight divided by the tangent of the predetermined angle.

Claims10

Dependent claims

A guide for locating a target object within a visually opaque but X-ray transparent object comprising:

a. base means for creating a first reference plane positionable under the opaque object;
b. a first support member attached to the base and extending perpendicular to the first reference plane;
c. a first and second target sighting means attached to the first support member;
each target sighting means having a portion opaque to X-ray first target mounting means on the first target sighting means for attaching the first target sighting means to the first support member for movement along the first support member such that the opaque portion of the first target sighting means, the axis of the projection of an X-ray generator and receiver and the target object are in a first reference line that is parallel to the first reference plane;
the second sighting means being positionable relative to the first support member such that the opaque portion of the second target sighting means, and the axis of projection of the X-ray generator and receiver and the target object are in a second reference line, which is perpendicular to the first reference plane;
d. a probe support positionable along the first support member at a predetermined angle to the first support member at a distance above the first reference line equal to the distance from the first support member to the second reference line divided by the tangent of the predetermined angle.

3 more elements

Dependencies are inferred from the claim text.

Placement guide

Life of this patent

Placement guide

Life of this patent

Abstract

Claims10