Apparatus and method for measuring anatomical objects using coordinated fluoroscopy
First Claim
1. A computer-assisted method for determining a dimension of an anatomical feature using two or more fluoroscopic images, the method comprising:
- displaying a first fluoroscopic image taken of an anatomical feature taken from a first pose, the first image being registered to a common three-dimensional coordinate system;
receiving indication of position of at least a first point and a second point within first image corresponding respectively to at least two anatomical landmarks shown within first image;
displaying a second fluoroscopic image taken of the anatomical feature from a second angle, the second image being registered to the known three-dimensional coordinate system;
indicating with reference to the second image where the anatomical landmarks lie along each of two lines of sight defined by the first and second points within the three-dimensional coordinate system; and
determining a distance of a line specified by the first and second points.
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Abstract
Two fluoroscopic images taken from two different angles of the same anatomical feature are registered to a common three-dimensional coordinate system. A dimension of the anatomical feature is determined by specifying with reference to the two registered fluoroscopic images two constrained points within the three-dimensional coordinate system that correspond to the boundaries of the anatomical feature, and calculating a straight-line distance between the two. Additionally, a three-dimensional virtual model of an implant is projected into each of two, registered fluoroscopic image, and a surgeon manipulates the projections to adjust the size and shape of the virtual model, and thereby determine parameters for the implant.
98 Citations
6 Claims
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1. A computer-assisted method for determining a dimension of an anatomical feature using two or more fluoroscopic images, the method comprising:
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displaying a first fluoroscopic image taken of an anatomical feature taken from a first pose, the first image being registered to a common three-dimensional coordinate system; receiving indication of position of at least a first point and a second point within first image corresponding respectively to at least two anatomical landmarks shown within first image; displaying a second fluoroscopic image taken of the anatomical feature from a second angle, the second image being registered to the known three-dimensional coordinate system; indicating with reference to the second image where the anatomical landmarks lie along each of two lines of sight defined by the first and second points within the three-dimensional coordinate system; and determining a distance of a line specified by the first and second points. - View Dependent Claims (2, 3, 4)
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5. An apparatus for determining a dimension of an anatomical feature using two or more fluoroscopic images, comprising:
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means for displaying a first fluoroscopic image taken of an anatomical feature taken from a first pose, the first image being registered to a common three-dimensional coordinate system; means for receiving indication of position of at least a first point and a second point within first image corresponding respectively to at least two anatomical landmarks shown within first image; means for displaying a second fluoroscopic image taken of the anatomical feature from a second angle, the second image being registered to the known three-dimensional coordinate system; means for indicating with reference to the second image where the anatomical landmarks lie along each of two lines of sight defined by the first and second points within the three-dimensional coordinate system; and means for determining distance of a line specified by the first and second points.
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6. A non-transitory computer readable storage medium on which is recorded program instructions that, when read and executed by a computer, cause the computer to undertake the following steps:
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displaying a first fluoroscopic image taken of an anatomical feature taken from a first pose, the first image being registered to a common three-dimensional coordinate system; receiving indication of position of at least a first point and a second point within first image corresponding respectively to at least two anatomical landmarks shown within first image; displaying a second fluoroscopic image taken of the anatomical feature from a second angle, the second image being registered to the known three-dimensional coordinate system; indicating with reference to the second image where the anatomical landmarks lie along each of two lines of sight defined by the first and second points within the three-dimensional coordinate system; and determining distance of a line specified by the first and second points.
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Specification