Granted Patent
B2
US 12,257,083 · App. 17/666,129 · Granted Mar 25, 2025
Methods for saturation correction and dynamic gain configuration and apparatuses for performing the same
Inventors:
Zhicong Yu (Highland Hts., OH); Amit Jain (Solon, OH); Daniel Gagnon (Twinsburg, OH); Chuanyong Bai (Solon, OH); Marc Chappo (Elyria, OH)
Assignee:
Accuray Inc.
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Abstract
Saturation in at least one saturated ray is in a method including identifying a saturated ray corresponding to a first ray of a radiation source received at a radiation detector after passing through a reference point during a current view of the radiation detector, identifying at least one non-saturated ray corresponding to a second ray of the radiation source received at the radiation detector, and responsive to the identifying, adjusting a value for the saturated ray based on a value of the at least one non-saturated ray. The non-saturated ray can be a ray from an adjacent view of a current rotation, an adjacent view of a previous or subsequent rotation, or a conjugate ray. Methods of selecting a gain level to avoid saturation are also disclosed.
Claims (20)
1. A method for correcting saturation in at least one saturated ray comprising:
identifying a saturated ray corresponding to a first ray of a radiation source received at a radiation detector after passing through a reference point during a current view of the radiation detector and saturates a pixel of the radiation detector;
identifying at least one non-saturated ray corresponding to a second ray of the radiation source received at the radiation detector after passing through the reference point during a previous view of the radiation detector and does not saturate a pixel of the radiation detector or a third ray of the radiation source received at the radiation detector after passing through the reference point during a next view of the radiation detector and does not saturate a pixel of the radiation detector, wherein:
each of the previous view of the radiation detector and the next view of the radiation detector is adjacent to the current view; and
the radiation source has a first energy for the current view and a second energy for the previous view and the next view, the second energy being different than the first energy; and
responsive to the identifying, adjusting a value for the saturated ray based on a value of the at least one non-saturated ray.
2. The method according to claim 1 , wherein the non-saturated ray is emitted during a current rotation of the radiation source.
3. The method according to claim 1 , wherein the non-saturated ray is emitted during a rotation of the radiation source that is different from than a rotation of the radiation source during which the saturated ray is emitted.
4. The method according to claim 1 , wherein the non-saturated ray corresponds to the second ray.
5. The method according to claim 1 , wherein the non-saturated ray corresponds to the third ray.
6. The method according to claim 1 , wherein the value of the saturated ray is adjusted based on a value of a non-saturated ray corresponding to the second ray and a value of a non-saturated ray corresponding to the third ray.
7. The method according to claim 1 , wherein the adjusting the value of the saturated ray comprises adjusting the value of the saturated ray based on a value of the non-saturated ray and a value of a non-saturated ray adjacent to the saturated ray from the current view of the radiation detector.
8. A method for correcting saturation in at least one saturated ray comprising:
identifying a saturated ray corresponding to a first ray of a radiation source received at a radiation detector after passing through a reference point during a current view of the radiation detector and saturates a pixel of the radiation detector;
identifying at least one non-saturated ray corresponding to a second ray of the radiation source received at the radiation detector after passing through the reference point during a conjugate view and does not saturate a pixel of the radiation detector, wherein:
the second ray is adjacent to a third ray, the third ray being rotated 180° with respect to the first ray; and
responsive to the identifying, adjusting a value for the saturated ray based on a value of the at least one non-saturated ray.
9. The method according to claim 8 , wherein the radiation source has a first energy for the current view and a second energy for the conjugate view, the second energy being different than the first energy.
10. The method according to claim 8 , wherein the value of the saturated ray is adjusted based on a value of a non-saturated ray corresponding to the second ray and a value of a non-saturated ray in a frame of the saturated ray.
11. The method according to claim 8 , wherein the value of the saturated ray is adjusted based on a value of a non-saturated ray corresponding to the second ray and a value of a non-saturated ray having a similar azimuth angle in a previous or next rotation as a rotation of the saturated ray.
Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Sep 30, 2025
From: ACCURAY, INC.
To: ACCURAY LLC
Reel/Frame 072427/0928 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 7, 2022
From: YU, ZHICONG; JAIN, AMIT; GAGNON, DANIEL; BAI, CHUANYONG; CHAPPO, MARC
To: ACCURAY INC.
Reel/Frame 058913/0452 →
Continuity (1)
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