System and method for accessing the three-dimensional geometry of large objects using X-ray based method subject to limitations on radiation doses

• US 5,946,370 A
• Filed: 04/15/1998
• Issued: 08/31/1999
• Est. Priority Date: 04/15/1998
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: International Business Machines Corporation
• Inventors: Tresser, Charles P., Margulies, Joseph Y., Kalvin, Alan David, Haramati, Nogah, Adler, Roy Lee, Wu, Chai Wah
• Primary Examiner(s): Bruce, David Vernon
• Application Number:
  US09/062,276
• Time in Patent Office: 503 Days
• Field of Search: 378/4, 378/8, 378/901, 382/131, 382/132
• US Class Current: 378/4
• CPC Class Codes: G06T 11/006 Inverse problem, transformation from projection-space into object-space, e.g. transform methods, back-projection, algebraic methods
• CPC Class Codes: G06T 17/00 Three dimensional [3D] modelling, e.g. data description of 3D objects
• CPC Class Codes: G06T 2211/436 Limited angle
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

A computer system and method solve the problem of getting a useful three dimensional representation of an object like the spine using a small amount of data. This is done by gathering and combining three dimensional data in the form of computer tomography (CT) scans of a patient'"'"'s bones with two dimensional data consisting of CT scout images (or scouts), which are digital two dimensional X-ray images that can be produced by a CT scanner. The main features of spinal deformation are captured by combining the two dimensional data from CT scouts and the three-dimensional information from the CT scans using simple modeling of vertebrae. Scouts are usually used to monitor CT scan acquisition. Here, they are also used as an essential source of data.

Claims

1. A computer-implemented method of three-dimensional modeling of objects comprising the steps of:

collecting a limited amount of two-dimensional data of an object and collecting a limited amount of three-dimensional data of the object, where the amount of two-dimensional data alone and the amount of three-dimensional data alone are not sufficient to give a good three-dimensional reconstruction; and

combining the collected small amount of two-dimensional data and the collected small amount of three-dimensional data to generate a three-dimensional model of the object.

2. The computer-implemented method in claim 1 used for three-dimensional reconstruction of the vertebral bodies of the spine by using computer tomography (CT) scans as the limited amount of three-dimensional data of the object and CT scout scans as the limited amount of two-dimensional data, the CT scans and the CT scout scans obtained using a sustainable amount of radiation.

3. A computer system used to improve three-dimensional reconstruction of objects by utilizing two-dimensional data to complement three-dimensional data comprising:

a computer with a memory, a central processing unit (CPU), and a display monitor;

a data structure resident in said memory and containing a limited amount of two-dimensional data of an object, where the amount of two-dimensional data alone is not sufficient to give a good three-dimensional reconstruction;

a data structure resident in said memory and containing a limited amount of three-dimensional data of the object, where the amount of three-dimensional data alone is not sufficient to give a good three-dimensional reconstruction; and

a process executed by the CPU, to construct a three-dimensional model of the object using the two-dimensional data and the three-dimensional data.

4. The computer system in claim 3 used for three-dimensional reconstruction of the vertebral bodies of the spine by using computer tomography (CT) scans as the limited amount of three-dimensional date of the object and CT scout scans as the limited amount of two-dimensional data, the CT scans and the CT scout scans obtained using a sustainable amount of radiation.