Abstract: Methods and systems are provided for preventing hot landings of a motor of an X-ray imaging system in the event of a power loss. In an example, a method for an X-ray tube of an imaging system includes, during a scan of a subject with the imaging system, supplying energy from a main power supply to the X-ray tube in order to rotate a target of the X-ray tube, selectively recovering energy from the X-ray tube and storing the recovered energy in an energy storage circuit of the imaging system, and detecting a loss of the main power supply, and in response, supplying energy from the energy storage circuit to the X-ray tube in order to rotate the target at a threshold speed.

Abstract: Various methods and systems are provided for an imaging system including a an X-ray source generating X-rays; an X-ray detector positioned opposite of the X-ray source for receiving X-rays; a gantry rotatably positioned within a gantry enclosure; a gantry motor coupled to the gantry to rotate the gantry; a power distribution unit (PDU) coupled to the gantry to provide power to the gantry; and a boost converter circuitry coupled to the PDU to maintain a voltage output of the PDU during generation of X-rays by the X-ray source. The method of providing power, via the PDU, to a gantry motor to rotate the gantry; providing power, via the PDU, to the X-ray source; and activating the boost converter circuitry to provide a voltage regulation to the gantry motor rotating the gantry via a gantry motor drive at a constant rotational speed.

Abstract: Methods and systems are provided for controlling an electron beam generated by an x-ray tube assembly including a unipolar cathode. In one embodiment, a voltage supplied to the cathode is controlled by a multi-stage switching unit including a first control circuit and a second control circuit. A bias voltage for switching the cathode on is generated by a voltage source of the second control circuit, and a gridding voltage for switching the cathode off is generated by a plurality of voltage sources of the first control circuit. When transitioning between the bias voltage and the gridding voltage and vice-versa, a control strategy is used where the voltage sources of the first control unit are selectively engaged and/or disengaged in a non-consecutive order in accordance with an optimized protocol, to prevent a voltage imbalance between capacitors of different stages of the multi-stage switching unit.

Abstract: Methods and systems are provided for preventing hot landings of a motor of an X-ray imaging system in the event of a power loss. In an example, a method for an X-ray tube of an imaging system includes, during a scan of a subject with the imaging system, supplying energy from a main power supply to the X-ray tube in order to rotate a target of the X-ray tube, selectively recovering energy from the X-ray tube and storing the recovered energy in an energy storage circuit of the imaging system, and detecting a loss of the main power supply, and in response, supplying energy from the energy storage circuit to the X-ray tube in order to rotate the target at a threshold speed.

Abstract: Systems are provided for a medical imaging system. In one example, an electronic assembly configured to control a cathode of an X-ray tube of the medical imaging system comprises a plurality of boards comprising a first analog board, a first digital board, a second power board, and a third power board, and at least two Faraday cages nested within one another, the at least two Faraday cages comprising an inner Faraday cage surrounding the first digital board and an outer Faraday cage surrounding each of the plurality of boards and the inner Faraday cage.

Abstract: Methods and systems are provided for controlling an electron beam generated by an X-ray tube assembly including a unipolar cathode with a long cable between driving electronics of the cathode and the X-ray tube. A voltage supplied to a gridding electrode of the cathode is controlled by a multi-stage switching unit including a first control circuit and a second control circuit. A bias voltage for switching the cathode on is generated by a high precision voltage source of the second control circuit, and a gridding voltage for switching the cathode off is generated by voltage sources of the first control circuit. A time taken to transition between the gridding voltage and the bias voltage is advantageously reduced by decreasing the supplied voltage to a common voltage (e.g., 0 V) in a first step, and then increasing the supplied voltage to the bias voltage or the gridding voltage in a second step.

Abstract: Methods and systems are provided for controlling an electron beam generated by an X-ray tube assembly including a unipolar cathode with a long cable between driving electronics of the cathode and the X-ray tube. A voltage supplied to a gridding electrode of the cathode is controlled by a multi-stage switching unit including a first control circuit and a second control circuit. A bias voltage for switching the cathode on is generated by a high precision voltage source of the second control circuit, and a gridding voltage for switching the cathode off is generated by voltage sources of the first control circuit. A time taken to transition between the gridding voltage and the bias voltage is advantageously reduced by decreasing the supplied voltage to a common voltage (e.g., 0 V) in a first step, and then increasing the supplied voltage to the bias voltage or the gridding voltage in a second step.

Abstract: Methods and systems are provided for controlling an electron beam generated by an x-ray tube assembly including a unipolar cathode. In one embodiment, a voltage supplied to the cathode is controlled by a multi-stage switching unit including a first control circuit and a second control circuit. A bias voltage for switching the cathode on is generated by a voltage source of the second control circuit, and a gridding voltage for switching the cathode off is generated by a plurality of voltage sources of the first control circuit. When transitioning between the bias voltage and the gridding voltage and vice-versa, a control strategy is used where the voltage sources of the first control unit are selectively engaged and/or disengaged in a non-consecutive order in accordance with an optimized protocol, to prevent a voltage imbalance between capacitors of different stages of the multi-stage switching unit.

Abstract: Systems are provided for a medical imaging system. In one example, an electronic assembly configured to control a cathode of an X-ray tube of the medical imaging system comprises a plurality of boards comprising a first analog board, a first digital board, a second power board, and a third power board, and at least two Faraday cages nested within one another, the at least two Faraday cages comprising an inner Faraday cage surrounding the first digital board and an outer Faraday cage surrounding each of the plurality of boards and the inner Faraday cage.

Abstract: A system for melting, sintering, or heat treating a material is provided. The system includes a cathode, an anode, and a focus coil assembly having a quadrupole magnet. The quadrupole magnet includes four poles and a yoke. The four poles are spaced apart and surround a beam cavity. Each of the four poles includes a pole face proximate the beam cavity and an end opposite the pole face. The first and third poles are aligned along an x-axis and configured to have a first magnetic polarity at their respective pole faces and a second magnetic polarity opposite the first magnetic polarity at their respective ends. The second and fourth poles are aligned along a y-axis and configured to have the second magnetic polarity at their respective pole faces and the first magnetic polarity at their respective ends. The yoke surrounds the poles and is coupled to the poles.

Abstract: Methods and systems for releasing growth factors are disclosed. In certain embodiments, a blood sample is exposed to a sequence of one or more electric pulses to trigger release of a growth factor in the sample. In certain embodiments, the growth factor release is not accompanied by clotting within the blood sample.

Abstract: A system for melting, sintering, or heat treating a material is provided. The system includes a cathode, an anode, and a focus coil assembly having a quadrupole magnet. The quadrupole magnet includes four poles and a yoke. The four poles are spaced apart and surround a beam cavity. Each of the four poles includes a pole face proximate the beam cavity and an end opposite the pole face. The first and third poles are aligned along an x-axis and configured to have a first magnetic polarity at their respective pole faces and a second magnetic polarity opposite the first magnetic polarity at their respective ends. The second and fourth poles are aligned along a y-axis and configured to have the second magnetic polarity at their respective pole faces and the first magnetic polarity at their respective ends. The yoke surrounds the poles and is coupled to the poles.

Abstract: In accordance with the present disclosure, ultrasound-based techniques using a combined scanning and treatment array module are employed to find and treat anomalies corresponding to bleed events. By way of example, ultrasound data may be acquired with a scanning array at one or more locations on a patient anatomy. A treatment array may deliver heat to a targeted anomaly to provide therapy. Such a technique may be useful outside of a hospital environment.

Abstract: A system for melting, sintering, or heat treating a material is provided. The system includes a cathode, an anode, and a focus coil assembly having a quadrupole magnet. The quadrupole magnet includes four poles and a yoke. The four poles are spaced apart and surround a beam cavity. Each of the four poles includes a pole face proximate the beam cavity and an end opposite the pole face. The first and third poles are aligned along an x-axis and configured to have a first magnetic polarity at their respective pole faces and a second magnetic polarity opposite the first magnetic polarity at their respective ends. The second and fourth poles are aligned along a y-axis and configured to have the second magnetic polarity at their respective pole faces and the first magnetic polarity at their respective ends. The yoke surrounds the poles and is coupled to the poles.

Abstract: Methods and systems for releasing growth factors are disclosed. In certain embodiments, a blood sample is exposed to a sequence of one or more electric pulses to trigger release of a growth factor in the sample. In certain embodiments, the growth factor release is not accompanied by clotting within the blood sample.

Abstract: In accordance with the present disclosure, exposure of a sample to one or more electric pulses via capacitive coupling is described. In certain embodiments, the sample may be a biological sample to be treated or modified using the pulsed electric fields. In certain embodiments, the electric pulses may be delivered to a load using capacitive coupling. In other embodiments, the electric pulses may be bipolar pulses.

Abstract: Methods and systems for releasing growth factors are disclosed. In certain embodiments, a blood sample is exposed to a sequence of one or more electric pulses to trigger release of a growth factor in the sample. In certain embodiments, the growth factor release is not accompanied by clotting within the blood sample.

Abstract: A system for melting, sintering, or heat treating a material is provided. The system includes a cathode, an anode, and a focus coil assembly having a quadrupole magnet. The quadrupole magnet includes four poles and a yoke. The four poles are spaced apart and surround a beam cavity. Each of the four poles includes a pole face proximate the beam cavity and an end opposite the pole face. The first and third poles are aligned along an x-axis and configured to have a first magnetic polarity at their respective pole faces and a second magnetic polarity opposite the first magnetic polarity at their respective ends. The second and fourth poles are aligned along a y-axis and configured to have the second magnetic polarity at their respective pole faces and the first magnetic polarity at their respective ends. The yoke surrounds the poles and is coupled to the poles.

Abstract: A system may be provided that may include an integrated motor drive configured to couple to a motor. The integrated motor drive may include a first converter that may be configured to electrically couple with a winding assembly of the motor. The first converter may include at least first conversion circuitry configured to form a first electrical excitation waveform and second conversion circuitry coupled in parallel to the second conversion circuitry and configured to form a second electrical excitation waveform. The first converter may also include a first transformer configured to form a first summation electrical excitation waveform from the first electrical excitation waveform and the second electrical excitation waveform that drives the motor.

Abstract: A system may be provided that may include an integrated motor drive configured to couple to a motor. The integrated motor drive may include a first converter that may be configured to electrically couple with a winding assembly of the motor. The first converter may include at least first conversion circuitry configured to form a first electrical excitation waveform and second conversion circuitry coupled in parallel to the second conversion circuitry and configured to form a second electrical excitation waveform. The first converter may also include a first transformer configured to form a first summation electrical excitation waveform from the first electrical excitation waveform and the second electrical excitation waveform that drives the motor.