Patents by Inventor Zejian Liu

Zejian Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240338355
    Abstract: Methods, systems, and apparatuses for improved quality assurance (QA) are described herein. A computing device may provide a user interface having multiple user interface elements that allow a user of the computing device to interact with a QA system. Each of the user interface elements may be associated with one or more QA tasks for a type(s) of medical equipment. The computing device may receive input from the user via at least one of the user interface elements. The computing device may determine a completion value for at least one of the QA tasks. The computing device may send an update message indicative of the completion value for the at least one QA task.
    Type: Application
    Filed: June 17, 2024
    Publication date: October 10, 2024
    Inventor: Zejian Liu
  • Patent number: 12013835
    Abstract: Methods, systems, and apparatuses for improved quality assurance (QA) are described herein. A computing device may provide a user interface having multiple user interface elements that allow a user of the computing device to interact with a QA system. Each of the user interface elements may be associated with one or more QA tasks for a type(s) of medical equipment. The computing device may receive input from the user via at least one of the user interface elements. The computing device may determine a completion value for at least one of the QA tasks. The computing device may send an update message indicative of the completion value for the at least one QA task.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: June 18, 2024
    Assignee: McKesson Corporation
    Inventor: Zejian Liu
  • Publication number: 20210303544
    Abstract: Methods, systems, and apparatuses for improved quality assurance (QA) are described herein. A computing device may provide a user interface having multiple user interface elements that allow a user of the computing device to interact with a QA system. Each of the user interface elements may be associated with one or more QA tasks for a type(s) of medical equipment. The computing device may receive input from the user via at least one of the user interface elements. The computing device may determine a completion value for at least one of the QA tasks. The computing device may send an update message indicative of the completion value for the at least one QA task.
    Type: Application
    Filed: March 24, 2020
    Publication date: September 30, 2021
    Inventor: ZEJIAN LIU
  • Patent number: 7826595
    Abstract: Micro-focus field emission x-ray sources and related methods are provided. A micro-focus field emission x-ray source can include a field emission cathode including a film with a layer of electron field emitting materials patterned on a conducting surface. Further, the x-ray source can include a gate electrode for extracting field emitted electrons from the cathode when a bias electrical field is applied between the gate electrode and the cathode. The x-ray source can also include an anode. Further, the x-ray source can include an electrostatic focusing unit between the gate electrode and anode. The electrostatic focusing unit can include multiple focusing electrodes that are electrically separated from each other. Each of the electrodes can have an independently adjustable electrical potential. A controller can be configured to adjust at least one of the electrical potentials of the focusing electrodes and to adjust a size of the cathode.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: November 2, 2010
    Assignee: The University of North Carolina
    Inventors: Zejian Liu, Otto Z. Zhou, Jianping Lu
  • Publication number: 20080043920
    Abstract: Micro-focus field emission x-ray sources and related methods are provided. A micro-focus field emission x-ray source can include a field emission cathode including a film with a layer of electron field emitting materials patterned on a conducting surface. Further, the x-ray source can include a gate electrode for extracting field emitted electrons from the cathode when a bias electrical field is applied between the gate electrode and the cathode. The x-ray source can also include an anode. Further, the x-ray source can include an electrostatic focusing unit between the gate electrode and anode. The electrostatic focusing unit can include multiple focusing electrodes that are electrically separated from each other. Each of the electrodes can have an independently adjustable electrical potential. A controller can be configured to adjust at least one of the electrical potentials of the focusing electrodes and to adjust a size of the cathode.
    Type: Application
    Filed: March 13, 2007
    Publication date: February 21, 2008
    Inventors: Zejian Liu, Otto Zhou, Jianping Lu