Three dimensional image reconstruction from single plane x-ray fluorograms
AssigneeCedara Software Corp.
InventorWido Menhardt
Life of this patent
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Abstract
A method is provided to reconstruct the three-dimensional image of an X-ray contrast agent-filled object having at least one plane of symmetry using a single plane two-dimensional X-ray projection. The projection is obtained by irradiating the object with X-rays substantially perpendicular to a selected plane of symmetry of the object. The absorbance value of each pixel in the projection, which is related to the distance travelled by the X-ray within the object, is then divided by 2 to define the z coordinates on each side of the x-y plane of symmetry of the object. The z coordinates together with the x,y coordinates of each pixel define the three-dimensional contour of the object.
Claims11
A method of constructing a three dimensional image from a two-dimensional X-ray projection of an object, the method comprising steps of:
- a) filling the object to be imaged with an X-ray agent, said X-ray agent attenuating X-rays;
- b) generating an X-ray absorbance profile by irradiating said agent-filled object with X-rays substantially perpendicularly to a selected plane of said object, said object is substantially symmetrical about said selected plane thereof, wherein said X-ray absorbance profile has an x, y coordinates on said selected plane and has an absorbance parameter (P) related to a distance (D) travelled by the X-ray;
- and
- c) producing a three-dimensional image of said object using said X-ray absorbance profile, by dividing the X-ray absorbance parameter by two and processing said divided absorbance parameter into a z-coordinate with respect to the x, y coordinate of the corresponding absorbance profile.
A method of constructing a three dimensional image from a two-dimensional X-ray image of an object, the method comprising steps of:
- a) filling the object to be imaged with an X-ray agent, said X-ray agent attenuating X-rays;
- b) generating a two-dimensional X-ray image with respect to a selected plane of said object by irradiating said agent-filled object with X-rays substantially perpendicularly to said selected plane of the object, said object is substantially symmetrical about said selected plane of the object, wherein said two-dimensional X-ray image includes a plurality of picture elements, each picture element having an x, y coordinates on said selected plane and having an X-ray absorbance parameter (P) indicating a distance D(x, y) travelled by the X-ray;
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- c) producing a three-dimensional image of said object using said two-dimensional X-ray image, by dividing the X-ray absorbance parameter of each picture element by two and processing said divided absorbance parameter into a z-coordinate with respect to each corresponding picture element, thereby to generate x, y and z coordinates presenting a three-dimensional image of said object.
An apparatus for constructing a three dimensional image from a two-dimensional X-ray projection of an object, the apparatus comprising:
- a) means for filling the object to be imaged with an X-ray agent, said X-ray agent attenuating X-rays;
- b) means for generating an X-ray absorbance profile by irradiating said agent-filled object with X-rays substantially perpendicularly to a selected plane of said object, said object is substantially symmetrical about said selected plane thereof, wherein said X-ray absorbance profile has an x, y coordinates on said selected plane and has an absorbance parameter (P) related to a distance (D) travelled by the X-ray;
- and
- c) means for producing a three-dimensional image of said object using said X-ray absorbance profile, by dividing the X-ray absorbance parameter by two and processing said divided absorbance parameter into a z-coordinate with respect to the x, y coordinate of the corresponding absorbance profile.
Dependencies are inferred from the claim text.