Methods and apparatus for dynamical helical scanned image production
First Claim
1. A method for producing images of an object comprising:
- dynamically helically scanning an object on a moving table utilizing a scanning imaging system;
acquiring and storing projection views of the object and corresponding table locations;
selecting a plane for reconstruction of an image of the object;
utilizing stored table locations to determine geometric variables applicable to the stored projection views; and
filtering and backprojecting the stored projection views utilizing the geometrical variables to reconstruct an image of the object at the reconstruction plane.
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Abstract
Some configurations of the present invention thus provide a method for producing images of an object. The method includes dynamically helically scanning an object on a moving table utilizing a scanning imaging system. During the scan, projection views of the object are acquired and stored together with corresponding table locations. A plane for reconstruction of an image of the object is selected. The stored table locations are used to determine geometric variables applicable to the stored projection views; and the stored projection views are filtered and backprojected utilizing the geometrical variables to reconstruct an image of the object at the reconstruction plane.
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Citations
28 Claims
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1. A method for producing images of an object comprising:
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dynamically helically scanning an object on a moving table utilizing a scanning imaging system;
acquiring and storing projection views of the object and corresponding table locations;
selecting a plane for reconstruction of an image of the object;
utilizing stored table locations to determine geometric variables applicable to the stored projection views; and
filtering and backprojecting the stored projection views utilizing the geometrical variables to reconstruct an image of the object at the reconstruction plane. - View Dependent Claims (2, 3, 4)
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5. A method for producing images of an object comprising:
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dynamically helically scanning an object on a moving table utilizing a scanning imaging system;
acquiring and storing projection views of the object and, for only some of the acquired projection views, corresponding determined or estimated table locations;
selecting a plane for reconstruction of an image of the object;
utilizing stored table locations to determine geometric variables applicable to the stored projection views; and
filtering and backprojecting the stored projection views utilizing the geometrical variables to reconstruct an image of the object at the reconstruction plane. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An imaging apparatus configured to:
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dynamically helically scan an object on a moving table;
acquire and store projection views of the object and corresponding table locations;
utilize stored table locations to determine geometric variables applicable to the stored projection views; and
filter and backproject the stored projection views utilizing the geometrical variables to reconstruct an image of the object at a selected reconstruction plane. - View Dependent Claims (16, 17, 18)
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19. An imaging apparatus configured to:
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dynamically helically scan an object on a moving table;
acquire and store projection views of the object and, for only some of the acquired projection views, corresponding determined or estimated table locations;
utilize stored table locations to determine geometric variables applicable to the stored projection views; and
filter and backproject the stored projection views utilizing the geometrical variables to reconstruct an image of the object at a selected reconstruction plane. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification