Apparatus for imaging the anatomy

• US 5,097,839 A
• Filed: 02/13/1990
• Issued: 03/24/1992
• Est. Priority Date: 11/10/1987
• Status: Expired due to Fees

• Current Assignee: George S. Allen
• Original Assignee: George S. Allen
• Inventors: Allen, George S.
• Primary Examiner(s): Smith, Ruth S.
• Application Number:
  US07/479,262
• Time in Patent Office: 770 Days
• Field of Search: 128/653 R, 128/653 A, 128/653 SC, 128/659, 606/130, 364/413.16, 364/413.18, 364/413.22, 378/910, 382/6
• US Class Current: 600/426
• CPC Class Codes: A61B 2090/363 Use of fiducial points
• CPC Class Codes: A61B 2090/3954 magnetic, e.g. NMR or MRI
• CPC Class Codes: A61B 6/12 Arrangements for detecting or locating foreign bodies
• CPC Class Codes: A61B 90/10 for stereotaxic surgery, e.g. frame-based stereotaxis
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61N 5/1049 for verifying the position of the patient with respect to the radiation beam
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

The present invention pertains to a fiducial implant for the human body that is detectable by an imaging system. The invention is comprised of a first portion and a second portion. The first portion is configured to be detected by an imaging system when placed beneath the skin. The second portion is configured for fixed attachment to a bone beneath the skin without penetrating entirely through the bone and without fracturing the bone. The first portion is of detectable size and comprised of a material for detection by an imaging system, and sufficiently small to avoid the distortion of the skin when placed at an interface between the skin and the bone. The first portion also has at least a portion which is spherical and defines a surface for cooperating with a tool for securing the second portion to the bone. Additionally, the placement of n fiducial implants, where n≧4 and is an integer, into a portion of anatomy of the human body allows for the recreation of a particular image slice of the portion of the anatomy taken by an imaging system with respect to a first time period, at subsequent imaging sessions and also with different scan modalities. This provides a doctor with the ability to accurately follow the progress of the portion of the anatomy of interest. Moreover, the existence of n fiducial implants allows a target to be identified within the portion of anatomy relative to an external coordinate system. The portion of anatomy with the target may then be operated on, for instance, robotically, or precisely irradiated.

Claims

1. An apparatus for producing image slices of the human anatomy of a patient comprising:

a. an imaging means for producing sliced images of a desired cross-section of the anatomy;

b. a display means for displaying the images produced by said imaging means;

c. means for defining a coordinate system fixed in time with respect to the human anatomy identifiable by said imaging means, wherein said means for defining a coordinate system includes n implantable fiducial implants, where n≧

4 and is an integer, said means being hidden from the exterior of the anatomy but detectable by said imaging means;

d. programmable data processing means cooperating with imaging means to obtain image slices during a first scan and to obtain image slices during a second scan substantially identical to the image slices of the first scan.

2. The apparatus according to claim 1 wherein each fiducial implant includes a first portion and a second portion, said first portion being configured to be detected by said imaging means, said second portion configured for temporarily fixed attachment to a patient.