IP Library Granted Patent US 11,307,312
Granted Patent B2
US 11,307,312 · App. 16/978,855 · Granted Apr 19, 2022

Image acquisition

Inventors: Roger Steadman Booker (Aachen, DE); Roland Proksa (Neu Wulmstorf, DE)
Assignee: KONINKLIJKE PHILIPS N.V.
G01T1/17A61B6/4208G01T1/20184G01T1/2985A61B6/032A61B6/4035
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Quick Facts
Patent No.
US 11,307,312
App. No.
16/978,855
Granted
Apr 19, 2022
Kind
B2
Abstract

The present invention relates to a detection device for X-rays, an imaging system and a method for detecting electro-magnetic radiation using a detection device for X-rays, wherein an estimate of an incomplete measurement is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam or in an intensity of the electromagnetic radiation.

Claims (29)

1. A detection device for X-rays, comprising:

at least one sensor configured to provide a current in response to electromagnetic radiation exposure during at least one image acquisition frame;

at least one electronics board comprising at least one integrator providing a capacitor that is configured to discharge in response to the current provided by the sensor, wherein a discharge of the capacitor defines at least one cycle;

a capacitor discharge analyzer configured to analyze the discharge of the capacitor and to provide a full-discharge signal when the capacitor is fully discharged in response to the current provided by the sensor;

a counter configured to measure a cycle time, defined as a period between a start of a new cycle and a full discharge of the capacitor based on the full-discharge signal provided to the counter by the capacitor discharge analyzer; and

a processor configured to:

obtain the cycle time of the at least one cycle from the counter;

store the obtained cycle time of the at least one cycle;

compare the cycle time of the at least one cycle with one or more previously stored cycle times; and

provide an estimate of an incomplete cycle acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam of the electromagnetic radiation or in an intensity of the electromagnetic radiation.

2. A method for detecting electromagnetic radiation comprising:

sensing electromagnetic radiation exposure during at least one image acquisition frame;

providing a cycle time of at least one cycle, wherein the cycle time is defined as the period to fully discharge a capacitor of at least one integrator of an electronics board of the detection device;

storing the provided cycle time of the at least one cycle; and

comparing the cycle time of the at least one cycle with one or more previously stored cycle times; wherein an estimate of an incomplete cycle is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam of the electromagnetic radiation or in an intensity of the electromagnetic radiation.

3. The method according to claim 2 , wherein the cycle time of the at least one cycle replaces the stored cycle time of a last completed cycle; if the at least one cycle is complete.

4. The method according to claim 2 , wherein the estimate for the incomplete cycle is acquired for a cycle time which is less than the stored cycle time of the last completed cycle.

5. The method according to claim 2 , wherein the ratio of the provided cycle time and the cycle time for the last completed cycle represents an estimate of the incomplete cycle.

6. The method according to claim 2 , wherein the cycle times of all cycles during at least one image acquisition frame are provided and a variance of the cycle time is calculated.

7. The method according to claim 2 , wherein the discontinuity comprises at least one of a change of wavelength of the electromagnetic radiation, a blank period of the electromagnetic radiation, and a change.

8. The method according to claim 2 , wherein a discontinuity of the electromagnetic radiation is compensated by modifying a gain of the at least one cycle during the at least one image acquisition frame.

9. The method according to claim 8 , wherein the modification of the gain comprises adding a reference voltage which resets the capacitor when the signal reaches a certain threshold.

10. The method according to claim 8 , wherein the reference voltage is different for subsequent image acquisition frames.

11. A non-transitory computer-readable medium having executable instructions stored thereon which, when executed by at least one processor, cause the at least one processor to perform a method for detecting electromagnetic radiation, the method comprising:

sensing electromagnetic radiation exposure during at least one image acquisition frame;

providing a cycle time of at least one cycle, wherein the cycle time is defined as the period to fully discharge a capacitor of at least one integrator of an electronics board of the detection device;

storing the provided cycle time of the at least one cycle; and

comparing the cycle time of the at least one cycle with one or more previously stored cycle times;

wherein an estimate of an incomplete cycle is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam of the electromagnetic radiation or in an intensity of the electromagnetic radiation.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2020
From: STEADMAN BOOKER, ROGER; PROKSA, ROLAND
To: KONINKLIJKE PHILIPS N.V.
Reel/Frame 053710/0236 →
Priority Claims (1)
EP 18160442 · Mar 7, 2018 · regional
Continuity (1)
Related Publication 20210041580A1 · Feb 11, 2021