Voltage ripple reduction
View Patent ↗Among other things, one or more techniques and/or systems are described for reducing a voltage ripple in an electric signal. In this way, in radiographic imaging modalities, for example, undesired fluctuations in an output of a radiation source (e.g., undesirable fluctuations in an energy level of emitted photons) may be reduced. To reduce the voltage ripple, a (ripple reducing) electric signal is generated that comprises properties substantially similar to the voltage ripple, but opposite in phase. The (ripple reducing) electric signal is then combined with the original electric signal to generate a combined electric signal with a voltage ripple that is reduced relative to the voltage ripple of the electric signal as initially generated.
1. A system for reducing fluctuation in an output of a radiation source of an imaging modality, comprising:
a waveform control component configured to:
receive information regarding a desired voltage to be applied to the radiation source;
determine a desired property of a second electric signal, generated by a waveform generator component, based upon the information; and
notify the waveform generator component of the desired property; the waveform generator component configured to:
generate the second electric signal, the second electric signal having the desired property and combined with a first electric signal generated by a power supply component to yield a combined electric signal having a reduced voltage ripple relative to a voltage ripple of the first electric signal, the combined electric signal input into the radiation source; and
a transformer circuit configured to electrically isolate the waveform generator component from the first electric signal, the second electric signal transmitted through the transformer circuit prior to being combined with the first electric signal.
2. The system of claim 1 , the imaging modality comprising a CT scanner.
3. The system of claim 1 , the imaging modality comprising a dual-energy CT scanner.
4. The system of claim 1 , the waveform control component configured to compare the information to information comprised within a lookup table to determine the desired property.
5. The system of claim 4 , the waveform control component configured to generate at least some of the information comprised within the lookup table based upon radiation flux measured during a calibration procedure.
6. The system of claim 4 , the waveform generator component configured to generate at least some of the information comprised within the lookup table based upon a measured voltage ripple of an electrical signal, generated by the power supply component and having the desired voltage, during a calibration procedure.
7. The system of claim 1 , the waveform control component configured to:
measure the voltage ripple of the first electric signal; and
adjust the desired property of the second electric signal based upon the voltage ripple of the first electric signal to generate an adjusted property for the second electric signal.
8. The system of claim 1 , the power supply component configured to output a high voltage DC signal.
9. The system of claim 1 , the power supply component configured to alternate a voltage of the first electric signal between at least two different voltages.
10. The system of claim 1 , the waveform control component configured to:
measure the voltage ripple of the combined electric signal; and
adjust the desired property of the second electric signal based upon the voltage ripple of the combined electric signal to generate an adjusted property for the second electric signal.
11. The system of claim 1 , the radiation source comprising an ionizing radiation source.
12. A method for reducing voltage ripple, comprising:
receiving information regarding a desired voltage to be applied to a radiation source;
comparing the information to information comprised within a lookup table to determine a desired property of a second electric signal;
generating the second electric signal based upon the desired property;
combining the second electric signal with a first electric signal to yield a combined electric signal having a reduced voltage ripple relative to a voltage ripple of the first electric signal; and
inputting the combined electrical signal into the radiation source.
13. The method of claim 12 , comprising:
measuring the voltage ripple of the combined electric signal; and
adjusting the desired property of the second electric signal based upon the voltage ripple of the combined electric signal to generate an adjusted property for the second electric signal.
14. The method of claim 12 , comprising:
generating at least some of the information comprised within the lookup table based upon radiation flux measured during a calibration procedure.
15. The method of claim 12 , comprising:
generating at least some of the information comprised within the lookup table based upon a measured voltage ripple of an electric signal having the desired voltage and generated during a calibration procedure.
16. The method of claim 12 , comprising:
measuring the voltage ripple of the first electric signal; and
adjusting one or more properties of the second electric signal based upon the voltage ripple of the first electric signal.
17. The method of claim 12 , the second electric signal having a voltage ripple that is opposite in phase to the voltage ripple of the first electric signal.
18. The method of claim 16 , the adjusting comprising:
adjusting one or more properties of the second electric signal based upon the measuring if the voltage ripple of the first electrical signal exceeds a threshold.
19. A computer readable medium comprising computer executable instructions that when executed via a processing unit perform a method for reducing voltage ripple, the method comprising:
receiving information regarding a desired voltage to be applied to a radiation source;
comparing the information to information comprised within a lookup table to determine a desired property of a second electric signal;
generating the second electric signal based upon the desired property;
combining the second electrical signal with a first electric signal to yield a combined electric signal having a reduced voltage ripple relative to a voltage ripple of the first electric signal; and
inputting the combined electrical signal into the radiation source.
20. The system of claim 1 , wherein the voltage ripple of the first electric signal is at least 1 kV.