Method and apparatus for ultrasound guidance of needle biopsies
First Claim
1. A guide for a needle-like instrument comprising:
- an ultrasonic transducer that projects a planar ultrasound beam into an ultrasonic imaging plane beneath a surface;
a source of illumination, aligned with the ultrasonic transducer, the source of illumination projecting a light beam onto the surface, the light beam being coplanar with the imaging plane and forming a line of light on the surface that is coincident with the ultrasonic imaging plane; and
a viewing device, causing an image produced by the ultrasonic transducer to appear to be superimposed on the surface while the line of light is visible on the surface.
2 Assignments
0 Petitions
Accused Products
Abstract
An ultrasound scanning system having an ultrasound transducer (10) which provides ultrasound images (33), a computer to process the ultrasound information and to render the ultrasound image (33) correctly positioned and scaled for display on a flat panel monitor (29) which has a display size similar to the actual physical size of the ultrasound image (33). A half silvered mirror (30) redirects the image (33) so that the user (32) perceives the image (33) as if it occupied the actual physical location of the structures (34, 35) appearing in the image (33). An illumination (22) unit projects onto a patient (13) a line of light (3) that is within the imaging plane (4) projected by the ultrasound transducer (10) into the patient (13). Alternatively a video camera may be used to display a guide line (15) that is coplanar with the imaging plane (4). A mechanical mount (16) combines the transducer (10), monitor (29), mirror (30), and source of illumination (22) or video camera in a correct geometrical alignment.
135 Citations
20 Claims
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1. A guide for a needle-like instrument comprising:
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an ultrasonic transducer that projects a planar ultrasound beam into an ultrasonic imaging plane beneath a surface;
a source of illumination, aligned with the ultrasonic transducer, the source of illumination projecting a light beam onto the surface, the light beam being coplanar with the imaging plane and forming a line of light on the surface that is coincident with the ultrasonic imaging plane; and
a viewing device, causing an image produced by the ultrasonic transducer to appear to be superimposed on the surface while the line of light is visible on the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
a monitor, the monitor displaying the image produced by the ultrasonic transducer; and
a mirror, the mirror redirecting the image to coincide with a line of sight of the user when the user is viewing the surface.
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7. The guide of claim 6, wherein the mirror resides in a plane that bisects an angle formed between the imaging plane and a plane in which the monitor resides.
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8. The guide of claim 7, wherein the mirror resides in a plane that is equidistant from the imaging plane and the plane in which the monitor resides.
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9. The guide of claim 1, wherein the source of illumination is a laser.
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10. The guide of claim 9, wherein the laser is rotatable about a lateral axis.
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11. The guide of claim 1, wherein the source of illumination is formed as a series of light emitting diodes arranged so as to reside within the imaging plane.
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12. The guide of claim 11, wherein the light emitting diodes are arranged in two rows positioned on opposing sides of the ultrasonic transducer.
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13. An apparatus for video assisted guidance of a needle-like instrument comprising:
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means for projecting a planar ultrasound beam into an ultrasonic imaging plane beneath a surface;
means for creating a video image of the surface;
means for inserting graphic markers on the video image of the surface, the graphic markers being substantially coplanar and coincident with the ultrasonic imaging plane and indicating a line of potential entry points for a needle biopsy; and
means for simultaneously viewing an image produced by the ultrasonic transducer with the video image of the surface. - View Dependent Claims (14, 15)
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16. A method of inserting an instrument into a comprising the steps of:
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projecting a planar ultrasound beam into an ultrasonic imaging plane into the body;
projecting a linear beam of light onto a surface of the body such that a line of light is formed on the surface and is coincident with the ultrasonic imaging plane;
deriving image information from the ultrasound transducer;
superimposing derived ultrasonic image information onto a view of the line of light appearing on the surface of the body so as to create a composite image; and
viewing the composite image while inserting instrument into the body. - View Dependent Claims (17, 18, 19, 20)
moving the ultrasonic transducer on the surface of the body until a desired object is visible in the derived ultrasonic image; and
orienting the ultrasonic transducer such that the line of light appears at a desired location.
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18. The method of claim 16, further comprising the steps of:
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placing an insertable portion of the instrument on a point contained in the line of light appearing on the surface; and
aligning the insertable portion of the instrument with the line of light, thereby insuring that the insertable portion of the instrument is coplanar with the imaging plane.
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19. The method of claim 18, further comprising the steps of:
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tilting the insertable portion of the instrument so that the insertable portion is pointed at the desired object; and
advancing the insertable portion of the instrument toward the desired object.
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20. The method of claim 18 wherein said step of aligning the insertable portion of the instrument further comprises the step of:
aligning the instrument with the line of light such that the instrument is illuminated along its length by the linear beam of light.
Specification