Optical tomography of small objects using parallel ray illumination and post-specimen optical magnification
First Claim
Patent Images
1. A shadowgram optical tomography system for imaging an object of interest comprising:
- a parallel ray light source for illuminating the object of interest with a plurality of parallel radiation beams;
an object containing tube, wherein the object of interest is held within the object containing tube such that it is illuminated by the plurality of parallel radiation beams to produce emerging radiation from the object containing tube;
a detector array located to receive the emerging radiation; and
means for tracking an image of the object of interest.
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Abstract
A shadowgram optical tomography system for imaging an object of interest. The shadowgram optical tomography system includes a parallel ray light source for illuminating the object of interest with a plurality of parallel radiation beams, an object containing tube, where the object of interest is held within the object containing tube such that it is illuminated by the plurality of parallel radiation beams to produce emerging radiation from the object containing tube, a detector array located to receive the emerging radiation, and a system and mehtod for tracking an image of the object of interest.
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Citations
12 Claims
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1. A shadowgram optical tomography system for imaging an object of interest comprising:
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a parallel ray light source for illuminating the object of interest with a plurality of parallel radiation beams;
an object containing tube, wherein the object of interest is held within the object containing tube such that it is illuminated by the plurality of parallel radiation beams to produce emerging radiation from the object containing tube;
a detector array located to receive the emerging radiation; and
means for tracking an image of the object of interest. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for tracking a focal plane during rotation of an object of interest undergoing optical tomography comprising the steps of:
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collecting a set of k pseudoprojection images pp1-ppk of the object of interest with an initial estimate for a radius from the tube center to the object center (R);
finding a set of center of mass values Xm1, Xm2, Xm3 . . . Xmk for the pseudoprojection images pp1-ppk;
recording a time of collection t1, t2, t3, . . . , tk for each of the set of pseudoprojection images pp1-ppk;
computing R and the value of Θ
at time k by calculating a minimum RMS error over the set of pseudoprojection images pp1-ppk;
estimating a real time value of Θ
based the set of center of mass values, the time of collection t1, t2, t3, . . . , tk and the clock for PP collection, and testing the real time value of Θ
for proximity to the value 0; and
when Θ
is anticipated to be 0 on the next clock cycle the trigger for capture of the set of pseudoprojection images is enabled. - View Dependent Claims (8, 9, 10, 11)
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12. A shadowgram optical tomography system for imaging an object of interest comprising:
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a light source for illuminating the object of interest with a plurality of radiation beams;
an object containing tube, wherein the object of interest is held within the object containing tube such that it is illuminated by the plurality of radiation beams to produce emerging radiation from the object containing tube;
a detector array located to receive the emerging radiation; and
means for tracking an image of the object of interest.
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Specification