Systems for correcting distortions in a medical image and methods of use thereof
AssigneeVolcano Corporation
InventorsElizabeth Begin, Nathaniel J. Kemp, Jason Sproul
Life of this patent
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Abstract
The invention relates generally systems for correcting distortion in a medical image and methods of use thereof. Methods and systems for displaying a medical image of a lumen of a biological structure, generally comprise obtaining image data of a lumen of a biological structure from an imaging device, correcting the image data for translational distortions, in which correcting is accomplished without reference to another data set, and displaying a corrected image.
Claims26
A method for displaying a medical image of a lumen of a biological structure, the method comprising providing at least one computer-readable medium having instructions stored thereon which, when executed by a computing device, cause the computing device to carry out operations comprising:
- obtaining image data of a lumen of a biological structure from an imaging device;
- correcting the image data for translational distortions, wherein correcting is accomplished without reference to another data set and wherein correcting comprises compensating for device angular distortion, wherein compensating comprises:
- aligning a reference position of a first frame with a catheter center position of a neighboring frame;
- determining a longitudinal distance between neighboring frames;
- evaluating an angle between two vectors, wherein a first vector is defined by a distance between a reference position in a first frame and a catheter center position in a neighboring frame, and a second vector is defined by a distance between a reference position in a first frame and a reference position in said neighboring frame;
- and
- rotating the neighboring frame about an axis through a value corresponding to the angle between the said two vectors, wherein said axis is located in a plane defined by the neighboring frame, intersecting the catheter center position of the neighboring frame, and oriented perpendicular to a plane in which said first vector and second vector are located;
- and
- displaying a corrected image.
A method for displaying a medical image of a lumen of a biological structure, the method comprising providing at least one computer-readable medium having instructions stored thereon which, when executed by a computing device, cause the computing device to carry out operations comprising:
- obtaining image data of a lumen of a biological structure from an imaging device;
- correcting the image data for translational distortions, wherein correcting is accomplished without reference to another data set and wherein correcting comprises compensating for helical offset distortion, wherein compensating comprises:
- evaluating the longitudinal displacement for a 360° set of image data points;
- and
- interpolating data points to lie in a plane perpendicular to the direction of longitudinal displacement, wherein said interpolation is proportional to an angular coordinate and corresponding longitudinal coordinate for each data point in a 360° image scan;
- and
- displaying a corrected image.
A system for displaying a medical image of a lumen of a biological structure, the system comprising a monitor to display an image of the lumen of the biological structure, a central processing unit (CPU), and storage coupled to the CPU for storing instructions that configure the CPU to:
- obtain image data of a lumen of a biological structure from an imaging device;
- correct the image data for translational distortions, wherein correcting is accomplished without reference to another data set and wherein to correct comprises compensating for device angular distortion, wherein compensating comprises:
- aligning a reference position of a first frame with a catheter center position of a neighboring frame;
- determining a longitudinal distance between neighboring frames;
- evaluating an angle between two vectors, wherein a first vector is defined by a distance between a reference position in a first frame and a catheter center position in a neighboring frame, and a second vector is defined by a distance between a reference position in a first frame and a reference position in said neighboring frame;
- and
- rotating the neighboring frame about an axis through a value corresponding to the angle between the said two vectors, wherein said axis is located in a plane defined by the neighboring frame, intersecting the catheter center position of the neighboring frame, and oriented perpendicular to a plane in which said first vector and second vector are located;
- and
- display a corrected image.
A system for displaying a medical image of a lumen of a biological structure, the system comprising a monitor to display an image of the lumen of the biological structure, a central processing unit (CPU), and storage coupled to the CPU for storing instructions that configure the CPU to:
- obtain image data of a lumen of a biological structure from an imaging device;
- correct the image data for translational distortions, wherein correcting is accomplished without reference to another data set and wherein to correct comprises compensating for device angular distortion and wherein to correct comprises compensating for helical offset distortion, wherein compensating comprises:
- evaluating the longitudinal displacement for a 360° set of image data points;
- and
- interpolating data points to lie in a plane perpendicular to the direction of longitudinal displacement, wherein said interpolation is proportional to an angular coordinate and corresponding longitudinal coordinate for each data point in a 360° image scan;
- and
- display a corrected image.
Dependencies are inferred from the claim text.