Patents by Inventor Guotu LI
Guotu LI 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).
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Publication number: 20240122463Abstract: Various apparatuses are disclosed (e.g., system, device, method, or the like) for guiding the capture and assessing the quality of an image, including dental images. The apparatuses may use trained neural networks to examine images and provide users feedback regarding image quality. The neural networks may be trained based on images within image groups that have been ranked based on perceived image quality.Type: ApplicationFiled: October 16, 2023Publication date: April 18, 2024Applicant: ALIGN TECHNOLOGY, INC.Inventors: Guotu LI, Chao SHI, Chad Clayton BROWN, Christopher E. CRAMER, Phillip Thomas HARRIS, Adam SILL, Will NEVILLE, Ritvik BANSAL
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Patent number: 11957541Abstract: Provided herein are systems and methods for scoring a post-treatment tooth position of a patient's teeth. A patient's dentition may be scanned and/or segmented. Raw dental features, principal component analysis (PCA) features, and/or other features may be extracted and compared to those of other teeth, such as those obtained through automated machine learning systems. A classifier can identify and/or output the post-treatment tooth position of the patient's teeth.Type: GrantFiled: December 23, 2022Date of Patent: April 16, 2024Assignee: Align Technology, Inc.Inventors: Guotu Li, Christopher E. Cramer, Chad Clayton Brown, Anton Spiridonov
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Patent number: 11962892Abstract: A method of dental treatment may include receiving photos of a person's dentition, identifying a stage of a treatment plan administered to the person's dentition, gathering a three-dimensional (3D) model of the person's dentition corresponding to the stage of the treatment plan, projecting attributes of the 3D model of the person's dentition onto an image plane to get a projected representation of the person's dentition at the stage of the treatment plan, comparing the photos to the projected representation to derive an error image representing the comparison, and analyzing the error image for discrepancies, wherein the discrepancies represent one or more deviations of the person's dentition from the stage of the treatment plan.Type: GrantFiled: July 22, 2021Date of Patent: April 16, 2024Assignee: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. Cramer, Rajiv Venkata, Leela Parvathaneni, Phillip Thomas Harris, Sravani Gurijala, Svetozar Hubenov, Sebastien Hareng, Guotu Li, Yun Gao, Chad Clayton Brown
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Publication number: 20240024075Abstract: Provided herein are systems and methods for optimizing a 3D model of an individual's teeth. A 3D dental model may be reconstructed from 3D parameters. A differentiable renderer may be used to derive a 2D rendering of the individual's dentition. 2D image(s) of an individual's dentition may be obtained, and features may be extracted from the 2D image(s). Image loss between the 2D rendering and the 2D image(s) can be derived, and back-propagation from the image loss can be used to calculate gradients of the loss to optimize the 3D parameters. A machine learning model can also be trained to predict a 3D dental model from 2D images of an individual's dentition.Type: ApplicationFiled: June 22, 2023Publication date: January 25, 2024Inventors: Guotu LI, Christopher E. CRAMER
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Patent number: 11800216Abstract: A method for dental treatment may include receiving photos capturing a state of a patient's dentition of a patient at a specific time, retrieving a first treatment plan to treat the patient's dentition, identifying an intended arrangement of the first treatment plan at the specific time, evaluating the photo parameters of the photos to generate alignment data to align the intended arrangement of the first treatment plan and the photos, generating an alignment mesh using the alignment data, the alignment mesh comprising a three-dimensional (3D) mesh representation of the patient's dentition at the specific time, performing an evaluation of the first treatment plan for modifications using the alignment mesh, and identifying proposed modifications to the first treatment plan based on the evaluation.Type: GrantFiled: July 22, 2021Date of Patent: October 24, 2023Assignee: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. Cramer, Rajiv Venkata, Leela Parvathaneni, Phillip Thomas Harris, Sravani Gurijala, Svetozar Hubenov, Sebastien Hareng, Guotu Li, Yun Gao, Chad Clayton Brown
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Patent number: 11723748Abstract: Provided herein are systems and methods for optimizing a 3D model of an individual's teeth. A 3D dental model may be reconstructed from 3D parameters. A differentiable renderer may be used to derive a 2D rendering of the individual's dentition. 2D image(s) of an individual's dentition may be obtained, and features may be extracted from the 2D image(s). Image loss between the 2D rendering and the 2D image(s) can be derived, and back-propagation from the image loss can be used to calculate gradients of the loss to optimize the 3D parameters. A machine learning model can also be trained to predict a 3D dental model from 2D images of an individual's dentition.Type: GrantFiled: December 23, 2020Date of Patent: August 15, 2023Assignee: Align Technology, Inc.Inventors: Guotu Li, Christopher E. Cramer
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Publication number: 20230225831Abstract: A method for dental treatment may include receiving a plurality of images of a patient, the plurality of images including the patient's dentition and an orthodontic appliance while the patient is wearing the orthodontic appliance, determining whether each of the plurality of images satisfy a plurality of detection criteria, segmenting the teeth in the images, segmenting the images to classify each pixel as being of the orthodontic appliance and the teeth, classifying the pixels of the image as being pixels belonging to a space between an aligner and a tooth, assigning the pixels belonging to a space to one or more of the teeth, determining a conversion between image-based spatial measurements to real-world spatial measurements by projecting a tooth from the treatment plan into a plane that corresponds to a plane of a corresponding tooth in the image, and determining a size of each of the one or more spaces.Type: ApplicationFiled: January 19, 2023Publication date: July 20, 2023Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Chad Clayton BROWN, Guotu LI
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Publication number: 20230225832Abstract: A method for dental treatment may include receiving a plurality of images of a patient's dentition, identifying, from the plurality of images, individual teeth of the patient's dentition, detecting, from the plurality of images, one or more attachments on the patient's dentition, assigning, based on each of the plurality of images, each of the one or more attachments to one of the individual teeth in each image, and combining the assignments of each of the plurality of images for attachment detection results.Type: ApplicationFiled: January 19, 2023Publication date: July 20, 2023Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Chad Clayton BROWN, Guotu LI
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Publication number: 20230129379Abstract: Provided herein are systems and methods for scoring a post-treatment tooth position of a patient's teeth. A patient's dentition may be scanned and/or segmented. Raw dental features, principal component analysis (PCA) features, and/or other features may be extracted and compared to those of other teeth, such as those obtained through automated machine learning systems. A classifier can identify and/or output the post-treatment tooth position of the patient's teeth.Type: ApplicationFiled: December 23, 2022Publication date: April 27, 2023Inventors: Guotu LI, Christopher E. CRAMER, Chad Clayton BROWN, Anton SPIRIDONOV
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Patent number: 11534272Abstract: Provided herein are systems and methods for scoring a post-treatment tooth position of a patient's teeth. A patient's dentition may be scanned and/or segmented. Raw dental features, principal component analysis (PCA) features, and/or other features may be extracted and compared to those of other teeth, such as those obtained through automated machine learning systems. A classifier can identify and/or output the post-treatment tooth position of the patient's teeth.Type: GrantFiled: September 12, 2019Date of Patent: December 27, 2022Assignee: Align Technology, Inc.Inventors: Guotu Li, Christopher E. Cramer, Chad Clayton Brown, Anton Spiridonov
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Publication number: 20220023003Abstract: A method of dental treatment may include receiving photos of a person's dentition, identifying a stage of a treatment plan administered to the person's dentition, gathering a three-dimensional (3D) model of the person's dentition corresponding to the stage of the treatment plan, projecting attributes of the 3D model of the person's dentition onto an image plane to get a projected representation of the person's dentition at the stage of the treatment plan, comparing the photos to the projected representation to derive an error image representing the comparison, and analyzing the error image for discrepancies, wherein the discrepancies represent one or more deviations of the person's dentition from the stage of the treatment plan.Type: ApplicationFiled: July 22, 2021Publication date: January 27, 2022Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Rajiv VENKATA, Leela PARVATHANENI, Phillip Thomas HARRIS, Sravani GURIJALA, Svetozar HUBENOV, Sebastien HARENG, Guotu LI, Yun GAO, Chad Clayton BROWN
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Publication number: 20220023008Abstract: A method for dental treatment may include receiving photos of a patient's dentition, gathering treatment parameters for at treatment plan. The treatment parameters may represent attributes of the treatment plan selected by a doctor for the patient's dentition of a patient. The method may include generating, using the photos and the treatment parameters, one or more intelligent guidance rules to guide application of at least a portion of the treatment parameters to the patient's dentition, generating instructions to apply the intelligent patient guidance rules to the patient's dentition, and providing the instructions to the patient to apply the at least a portion of the treatment plan in accordance with the intelligent patient guidance rules.Type: ApplicationFiled: July 22, 2021Publication date: January 27, 2022Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Rajiv VENKATA, Leela PARVATHANENI, Phillip Thomas HARRIS, Sravani GURIJALA, Svetozar HUBENOV, Sebastien HARENG, Guotu LI, Yun GAO, Chad Clayton BROWN
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Publication number: 20220028071Abstract: A method for image-based orthodontic treatment may include receiving image data of a patient's dentition and an orthodontic appliance, identifying, from the image data, the orthodontic appliance, calculating a misalignment height of a misalignment of the orthodontic appliance with respect to the patient's dentition, determining whether the misalignment height satisfies a misalignment threshold, and in response to satisfying the misalignment threshold, providing a notification.Type: ApplicationFiled: July 22, 2021Publication date: January 27, 2022Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Rajiv VENKATA, Leela PARVATHANENI, Phillip Thomas HARRIS, Sravani GURIJALA, Svetozar HUBENOV, Sebastien HARENG, Guotu LI, Yun GAO, Chad Clayton BROWN
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Publication number: 20220030162Abstract: A method for treatment-based photo guidance may include receiving a treatment plan, determining the movement of a first one or more teeth based on the movement of tooth models in the treatment plan, and determining one or more photo views for capturing the movement of the first one or more teeth.Type: ApplicationFiled: July 22, 2021Publication date: January 27, 2022Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Rajiv VENKATA, Leela PARVATHANENI, Phillip Thomas HARRIS, Sravani GURIJALA, Svetozar HUBENOV, Sebastien HARENG, Guotu LI, Yun GAO, Chad Clayton BROWN
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Publication number: 20220028536Abstract: A method for dental treatment may include receiving photos capturing a state of a patient's dentition of a patient at a specific time, retrieving a first treatment plan to treat the patient's dentition, identifying an intended arrangement of the first treatment plan at the specific time, evaluating the photo parameters of the photos to generate alignment data to align the intended arrangement of the first treatment plan and the photos, generating an alignment mesh using the alignment data, the alignment mesh comprising a three-dimensional (3D) mesh representation of the patient's dentition at the specific time, performing an evaluation of the first treatment plan for modifications using the alignment mesh, and identifying proposed modifications to the first treatment plan based on the evaluation.Type: ApplicationFiled: July 22, 2021Publication date: January 27, 2022Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Rajiv VENKATA, Leela PARVATHANENI, Phillip Thomas HARRIS, Sravani GURIJALA, Svetozar HUBENOV, Sebastien HARENG, Guotu LI, Yun GAO, Chad Clayton BROWN
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Publication number: 20220023002Abstract: A method of dental treatment may include receiving one or more photo parameters to define clinically acceptable criteria for a plurality of clinically relevant photos of a person's dentition. The clinically acceptable criteria may include at least a plurality of clinically acceptable positions and a plurality of clinically acceptable orientations of teeth relative to a camera. The method may also include gathering a plurality of image-capture rules to capture the plurality of clinically relevant photos. The plurality of image capture rules may be based on the one or more photo parameters. The method may also include providing first automated instructions to capture the plurality of clinically relevant photos of the person's dentition using the plurality of image-capture rules and capturing the plurality of clinically relevant photos with the camera in response to the first automated instructions.Type: ApplicationFiled: July 22, 2021Publication date: January 27, 2022Applicant: ALIGN TECHNOLOGY, INC.Inventors: Christopher E. CRAMER, Rajiv VENKATA, Leela PARVATHANENI, Phillip Thomas HARRIS, Sravani GURIJALA, Svetozar HUBENOV, Sebastien HARENG, Guotu LI, Yun GAO, Chad Clayton BROWN
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Publication number: 20210186659Abstract: Provided herein are systems and methods for optimizing a 3D model of an individual's teeth. A 3D dental model may be reconstructed from 3D parameters. A differentiable renderer may be used to derive a 2D rendering of the individual's dentition. 2D image(s) of an individual's dentition may be obtained, and features may be extracted from the 2D image(s). Image loss between the 2D rendering and the 2D image(s) can be derived, and back-propagation from the image loss can be used to calculate gradients of the loss to optimize the 3D parameters. A machine learning model can also be trained to predict a 3D dental model from 2D images of an individual's dentition.Type: ApplicationFiled: December 23, 2020Publication date: June 24, 2021Inventors: Guotu LI, Christopher E. CRAMER
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Publication number: 20200085546Abstract: Provided herein are systems and methods for scoring a post-treatment tooth position of a patient's teeth. A patient's dentition may be scanned and/or segmented. Raw dental features, principal component analysis (PCA) features, and/or other features may be extracted and compared to those of other teeth, such as those obtained through automated machine learning systems. A classifier can identify and/or output the post-treatment tooth position of the patient's teeth.Type: ApplicationFiled: September 12, 2019Publication date: March 19, 2020Inventors: Guotu LI, Christopher E. CRAMER, Chad Clayton BROWN, Anton SPIRIDONOV