High-voltage power supply and regulator circuit for an X-ray tube with closed-loop feedback for controlling X-ray exposure
First Claim
1. Apparatus for supplying operating power to an X-ray generating source, wherein the source projects X-ray radiation toward a patient, a portion of the radiation passing through the patient and being utilized to produce an image of the patient, the apparatus comprising:
- a power supply means for receiving a low-voltage input signal and producing a high-voltage output signal, said power supply means comprising;
first control means for receiving the low-voltage input signal of one or more phases, the first control means separately controlling the one or more phases of the input signal to produce one or more single-phase input signals;
voltage transforming and combining means for receiving selective portions of the single-phase input signals from the first control means and producing a high-voltage supply signal; and
means for monitoring the high-voltage supply signal and generating a first control signal which is sent to the first control means for controlling which selective portions of each of the single-phase input signals that are applied to the transforming means to cause the high-voltage supply signal to approach a predetermined magnitude, the first control means including solid-state switching devices which are selectively activated by the first control signal;
second control means for receiving the high-voltage supply signal and regulating at least one of the duration and amplitude of the high-voltage supply signal to produce a high-voltage output signal for operating the X-ray generating source, said second control means including a plurality of solid-state switching means arranged in series, and feedback control means for controlling each of the switching means to produce the high-voltage output signal;
means for receiving X-ray radiation which has passed through a patient and generating a feedback signal representative thereof, wherein the feedback control means is responsive to the feedback signal for controlling at least one of the magnitude and duration of the output signal and thus controlling the amount of X-ray radiation received by the patient.
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Accused Products
Abstract
Apparatus for supplying operating power to an X-ray generating source, wherein the source sends a radiation signal to a patient and a portion of the signal which passes through the patient is utilized to produce an image of the patient, the apparatus comprising a power supply which includes a mechanism for receiving a low-voltage input signal and a voltage transforming and combining mechanism for producing a high voltage signal; and a mechanism for monitoring the high-voltage supply signal, a mechanism for receiving the supply signal and regulating the duration or amplitude of the supply signal to produce a high-voltage regulated output signal for operating the X-ray generating source, and a mechanism for receiving X-ray radiation which has passed through a patient and generating a feedback signal representative thereof which enables automatic control of the amount of X-ray radiation received by the patient.
67 Citations
18 Claims
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1. Apparatus for supplying operating power to an X-ray generating source, wherein the source projects X-ray radiation toward a patient, a portion of the radiation passing through the patient and being utilized to produce an image of the patient, the apparatus comprising:
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a power supply means for receiving a low-voltage input signal and producing a high-voltage output signal, said power supply means comprising; first control means for receiving the low-voltage input signal of one or more phases, the first control means separately controlling the one or more phases of the input signal to produce one or more single-phase input signals; voltage transforming and combining means for receiving selective portions of the single-phase input signals from the first control means and producing a high-voltage supply signal; and means for monitoring the high-voltage supply signal and generating a first control signal which is sent to the first control means for controlling which selective portions of each of the single-phase input signals that are applied to the transforming means to cause the high-voltage supply signal to approach a predetermined magnitude, the first control means including solid-state switching devices which are selectively activated by the first control signal; second control means for receiving the high-voltage supply signal and regulating at least one of the duration and amplitude of the high-voltage supply signal to produce a high-voltage output signal for operating the X-ray generating source, said second control means including a plurality of solid-state switching means arranged in series, and feedback control means for controlling each of the switching means to produce the high-voltage output signal; means for receiving X-ray radiation which has passed through a patient and generating a feedback signal representative thereof, wherein the feedback control means is responsive to the feedback signal for controlling at least one of the magnitude and duration of the output signal and thus controlling the amount of X-ray radiation received by the patient. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for supplying operating power to an X-ray generating source, wherein the source projects X-ray radiation toward a patient, a portion of the radiation passing through the patient and being utilized to control the amount of radiation projected toward the patient, the apparatus comprising:
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a power supply mechanism which receives a low-voltage input signal and produces a high-voltage supply signal; a regulator circuit which receives the supply signal and regulates an amplitude of the supply signal to produce a high-voltage output signal for operating the X-ray generating source over the course of an exposure having a predetermined maximum length, said regulator circuit including a plurality of solid-state switching devices arranged in series for controlling the output signal; a feedback control mechanism connected to the regulator circuit which controls the solid-state switching devices to produce the output signal; an X-ray radiation receptor connected to the feedback control mechanism, the receptor receiving the radiation which passes through the patient and generating a feedback signal representative thereof, the feedback control mechanism being responsive to the feedback signal and modifying the amplitude of the output signal such that the rate of receipt of X-ray radiation by the patient is varied during the course of the exposure period. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification