Adaptive frame scanning scheme for pulsed X-ray imaging
AssigneePerkinElmer Holdings, Inc.
InventorFarhad Ghelmansarai
Life of this patent
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Abstract
A method for adaptive frame scanning for pulsed x-ray imaging comprising the steps of: scanning lines on an image detector sequentially; receiving an indication that radiation is about to begin; waiting a fixed delay after the indication is received; suspending scanning after the fixed delay has lapsed; and resuming scanning of lines on the detector upon receiving an indication that radiation has stopped. By monitoring for completion of a frame a predetermined frame delay can be added before commencing the next line scan to accommodate jitter in the radiation pulse timing.
Claims16
A method for adaptive frame scanning for pulsed X-ray imaging of X-ray radiation delivered in a sequence of pulses having an X-ray pulsing period, the method comprising the steps of:
- scanning lines on an image detector sequentially, wherein the lines on the image detector are scanned in a frame scan time, and wherein the frame scan time is longer than the X-ray pulsing period;
- receiving an indication that the radiation is about to begin;
- waiting a fixed delay after the indication that the radiation is about to begin is received;
- suspending scanning lines on the image detector after the fixed delay has lapsed, wherein scanning lines on the image detector is suspended before the radiation begins;
- resuming scanning lines on the image detector upon receiving an indication that the radiation has stopped.
A system for control of an X-ray image detector comprising:
- an x-ray source;
- a signal generator connected to the X-ray source and capable of providing a first signal indicating that radiation is about to begin and a second signal that radiation has stopped;
- a detector frame scan signal generator capable of receiving the first and second signals from the signal generator, waiting a delay responsive to the first signal, providing a first control signal to suspend line scanning responsive to the delay, and providing a second control signal to activate line scanning responsive to the second signal from the signal generator.
A method of scanning an imaging array used to convert incident X-rays into electrical signals, wherein the X-rays are delivered in a sequence of pulses, and wherein a warning signal is generated at a first time interval prior to the delivery of each X-ray pulse, said method comprising the steps of:
- (a) initiating the scanning of the array at the end of an X-ray pulse;
- (b) upon detection of the warning signal, continuing the scanning of the array for a second time interval shorter than said first interval and then halting the scanning of the array;
- and
- (c) repeating steps (a) and (b).
Dependencies are inferred from the claim text.