[특허]Photograph-based assessment of dental treatments and procedures

Align Technology, Inc.

검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
검색연산자

검색도움말
검색연산자	기능	검색시 예
()	우선순위가 가장 높은 연산자	예1) (나노 (기계 \| machine))
공백	두 개의 검색어(식)을 모두 포함하고 있는 문서 검색	예1) (나노 기계) 예2) 나노 장영실
\|	두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색	예1) (줄기세포 \| 면역) 예2) 줄기세포 \| 장영실
!	NOT 이후에 있는 검색어가 포함된 문서는 제외	예1) (황금 !백금) 예2) !image
*	검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색	예) semi*
""	따옴표 내의 구문과 완전히 일치하는 문서만 검색	예) "Transform and Quantization"

과학기술 지식인프라 ScienceON

연합인증

연합인증 가입 기관의 연구자들은 소속기관의 인증정보(ID와 암호)를 이용해 다른 대학, 연구기관, 서비스 공급자의 다양한 온라인 자원과 연구 데이터를 이용할 수 있습니다.

이는 여행자가 자국에서 발행 받은 여권으로 세계 각국을 자유롭게 여행할 수 있는 것과 같습니다.

연합인증으로 이용이 가능한 서비스는 NTIS, DataON, Edison, Kafe, Webinar 등이 있습니다.

한번의 인증절차만으로 연합인증 가입 서비스에 추가 로그인 없이 이용이 가능합니다.

다만, 연합인증을 위해서는 최초 1회만 인증 절차가 필요합니다. (회원이 아닐 경우 회원 가입이 필요합니다.)

연합인증 절차는 다음과 같습니다.

최초이용시에는
ScienceON에 로그인 → 연합인증 서비스 접속 → 로그인 (본인 확인 또는 회원가입) → 서비스 이용

그 이후에는
ScienceON 로그인 → 연합인증 서비스 접속 → 서비스 이용

연합인증을 활용하시면 KISTI가 제공하는 다양한 서비스를 편리하게 이용하실 수 있습니다.

특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Photograph-based assessment of dental treatments and procedures

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-009/62 H04N-007/18 G06T-005/20 A61C-007/00 G06T-007/00 G06T-007/32 G06T-007/136
출원번호	US-0831548 (2015-08-20)
등록번호	US-10248883 (2019-04-02)
발명자 / 주소	Borovinskih, Artem Derakhshan, Mitra Koppers, Carina Meyer, Eric Tolstaya, Ekaterina Brailov, Yury
출원인 / 주소	Align Technology, Inc.
대리인 / 주소	Shay Glenn LLP
인용정보	피인용 횟수 : 0 인용 특허 : 346

초록
▼

The current document is directed to methods and systems for monitoring a dental patient's progress during a course of treatment. A three-dimensional model of the expected positions of the patient's teeth can be projected, in time, from a three-dimensional model of the patient's teeth prepared prior to beginning the treatment. A digital camera is used to take one or more two-dimensional photographs of the patient's teeth, which are input to a monitoring system. The monitoring system determines virtual-camera parameters for each two-dimensional input image with respect to the time-projected three-dimensional model, uses the determined virtual-camera parameters to generate two-dimensional images from the three-dimensional model, and then compares each input photograph to the corresponding generated two-dimensional image in order to determine how closely the three-dimensional arrangement of the patient's teeth corresponds to the time-projected three-dimensional arrangement.

대표
청구항
▼

1. A dental-treatment monitoring system comprising: one or more processors;one or more electronic memories that store instructions and data;one or more mass-storage devices that store encoded images and patient information;a communications subsystem through which the dental-treatment monitoring system receives images and information from remote computer systems; andcomputer instructions, encoded in one or more of the one or more electronic memories, that control the dental-treatment monitoring system to store, in one or more data-storage devices selected from among the one or more electronic memories and one or more mass-storage devices, a three-dimensional model of a patient's teeth, receive, through the communications subsystem, one or more two-dimensional digital photographs of the patient's teeth taken at a time t during the course of a dental treatment, project, in time, the three-dimensional model of the patient's teeth to the time t to generate and store a time-projected three-dimensional model of the patient's teeth representing an expected configuration of the patient's teeth, compare one or more of the one or more two-dimensional digital photographs to corresponding two-dimensional digital images generated from the time-projected three-dimensional model of the patient's teeth to generate one or more comparison values and generate, from the received one or more two-dimensional digital photographs, a set of one or more processed images with associated metadata for analysis, determine, for each image in the set of one or more processed images, a set of virtual-camera parameters that describe the position, and orientation for a virtual camera that produces a generated image from the time-projected three-dimensional model of the patient's teeth equivalent to the image in the set of one or more processed images, use, for each image in the set of one or more processed images, the standard type of view and additional metadata to generate an initial set of virtual-camera parameters for the image in the set of one or more processed images, use the standard type of view and additional metadata to determine a value for an iteration variable; carry out a number of optimization iterations equal to the value of the iteration variable; and finally refine the virtual-camera parameters for the image in the set of one or more processed images, generate, for each image in the set of one or more processed images, a generated image corresponding to the image from the time-projected three-dimensional model of the patient's teeth and the virtual-camera parameters determined for the image in the set of one or more processed images, and compare each image in the set of one or more processed images with the corresponding generated image to generate the one or more comparison values for the image in the set of one or more processed images, determine, from the one or more comparison values, whether or not a configuration of the patient's teeth is within a threshold level of correspondence to the expected configuration of the patient's teeth, and store an indication of the determination in one of the one or more electronic memories. 2. The dental-treatment monitoring system of claim 1 wherein the received two-dimensional digital photographs are associated with a patient identifier; and wherein each of the received two-dimensional digital photographs are associated with metadata that includes one or more of: one or more text labels for the two-dimensional image, including an indication of a standard type of view represented by the image, and characterizations and parameters for the digitally encoded image, including an image size, date and time information, an indication of a camera model and make, an indication of a camera orientation, an indication of an aperture, an indication of a shutter speed, an indication of a focal length, an indication of a metering mode, and an indication of a speed. 3. The dental-treatment monitoring system of claim 2 further comprises verifying and filtering, by the dental-treatment monitoring system, the patient ID and the received two-dimensional digital photographs and associated metadata to produce a set of one or more processed images for analysis by: accessing stored information to verify that the patient ID corresponds to a patient record; for each input image, determining that the image corresponds to the standard type of view indicated by the one or more text labels, applying filters and contrast adjustment to enhance the image for subsequent processing, when the image is the first image of a standard type of view, adding the image and associated metadata to the set of one or more processed images, and when the image has the same standard type of view as an image already added to the set of one or more processed images, replacing the image already added to the set of one or more processed images with the image and associated metadata; and determining whether the set of one or more processed images can be used for dental-treatment-progress analysis. 4. The dental-treatment monitoring system of claim 1 wherein each optimization iteration includes: a first adjustment of the current virtual-camera parameters for the image in the set of one or more processed images; a second adjustment of the current virtual-camera parameters for the image; a first refinement of the current virtual-camera parameters for the image; and a second refinement of the current virtual-camera parameters for the image. 5. The dental-treatment monitoring system of claim 4, further comprising, for each optimization iteration, thresholding the image to generate a first teeth mask for the image; thresholding a next corresponding image generated from the time-projected three-dimensional model of the patient's teeth using the current virtual-camera parameters for the image to generate a next second corresponding teeth mask, generating a distance transform of the first teeth mask, searching over scalings, rotations, and translations of the next second corresponding teeth mask to identify a next minimum-cost overlay of the next second corresponding teeth mask over the distance transform of the first teeth mask, and adjusting the virtual-camera parameters for the image corresponding to the next minimum-cost overlay; and selecting, as the adjusted virtual-camera parameters for the image, the virtual-camera parameters associated with lowest-cost overlay of any of the generated next second corresponding teeth mask over the distance transform of the first teeth mask. 6. The dental-treatment monitoring system of claim 5 wherein the cost of an overlay of a next second corresponding teeth mask over the distance transform of the first teeth mask is the sum of the distances associated with pixels in the distance transform of the first teeth underlying a tooth region within the next second corresponding teeth mask. 7. The dental-treatment monitoring system of claim 5 wherein adjusting the virtual-camera parameters for the image corresponding to the next minimum-cost overlay includes: adjusting the virtual-camera parameters to move the position of the center of the next corresponding image generated from the time-projected three-dimensional model of the patient's teeth; adjusting the virtual-camera parameters to rotate the next corresponding image generated from the time-projected three-dimensional model of the patient's teeth in the image plane; adjusting the virtual-camera parameters to rotate the next corresponding image generated from the time-projected three-dimensional model of the patient's teeth about an axis parallel to the image plane; adjusting the virtual-camera parameters to rescale the next corresponding image generated from the time-projected three-dimensional model of the patient's teeth. 8. The dental-treatment monitoring system of claim 4 wherein the second adjustment of the current virtual-camera parameters for the image comprises: for each of the patient's two jaws, masking out the other of the two jaws and associated teeth from the image, and optimizing the virtual-camera parameters for the image with respect to a pixel-associated cost for the image and a next corresponding image. 9. The dental-treatment monitoring system of claim 8 wherein the cost for the image and a next corresponding image is computed as a linear combination of the mutual information for the image and the next corresponding image and the sum of pixel-associated costs for the image and the next corresponding image based on a dot-product result for gradient vectors for the image and the next corresponding image computed for each pixel. 10. The dental-treatment monitoring system of claim 8 wherein optimizing the virtual-camera parameters for the image comprises: for each optimization iteration, generating a next corresponding image generated from the time-projected three-dimensional model of the patient's teeth using the current virtual-camera parameters for the image, computing a cost for the image and next corresponding image, and perturbing the virtual-camera parameters for the image in a direction that minimizes the cost for the image and next corresponding image. 11. The dental-treatment monitoring system of claim 8 wherein optimizing the virtual-camera parameters for the image comprises application of a Nelder-Mead downhill simplex optimization method, with seven dimensions, including three rotations, three translations, and the virtual-camera view angle. 12. The dental-treatment monitoring system of claim 4 wherein the first refinement of the current virtual-camera parameters for the image comprises: for each of the patient's two jaws, for each tooth group of the currently considered jaw, masking the image to leave the currently considered tooth group, and optimizing the virtual-camera parameters for the image with respect to a gradient-vector-based cost for the image and a next corresponding image. 13. The dental-treatment monitoring system of claim 4 wherein the second refinement of the current virtual-camera parameters for the image comprises: for each of the patient's two jaws, for each tooth group of the currently considered jaw, masking the image to leave the currently considered tooth group, and optimizing the virtual-camera parameters for the image with respect to a Laplacian-vector-based cost for the image and a next corresponding image. 14. The dental-treatment monitoring system of claim 1 wherein comparing each image in the set of one or more processed images with the corresponding generated image to generate a comparison value for the image further comprises: for each image, preparing a teeth contour from the corresponding generated image; overlaying the teeth contour onto the image; and generating a fitness metric for the image, corresponding image, and overlaid contour. 15. The dental-treatment monitoring system of claim 14 wherein the fitness metric is based on a per-pixel cost equal to the normalized dot product of gradient vectors for the image and corresponding image computed for a pixel. 16. The dental-treatment monitoring system of claim 15 wherein the fitness metric is the sum of the per-pixel costs for pixels overlying the contour divided by the length of the contour. 17. The dental-treatment monitoring system of claim 15 wherein the fitness metric is the sum of the per-pixel costs for pixels overlying the contour divided by the sum of maximum costs of pixels within a compact neighborhood that includes each pixel overlying the contour. 18. A method carried out within a dental-treatment monitoring system having one or more processors, one or more electronic memories that store instructions and data, one or more mass-storage devices that store encoded images and patient information, and a communications subsystem through which the dental-treatment monitoring system receives images and information from remote computer systems, the method comprising: storing, in one or more data-storage devices selected from among the one or more electronic memories and one or more mass-storage devices, a three-dimensional model of a patient's teeth; receiving, through the communications subsystem, one or more two-dimensional digital photographs of the patient's teeth taken at a time t during the course of a dental treatment, projecting, in time, the three-dimensional model of the patient's teeth to the time t to generate and store a time-projected three-dimensional model of the patient's teeth representing an expected configuration of the patient's teeth; comparing one or more of the one or more two-dimensional digital photographs to corresponding two-dimensional digital images generated from the time-projected three-dimensional model of the patient's teeth to generate one or more comparison values; generating, from the received one or more two-dimensional digital photographs, a set of one or more processed images with associated metadata for analysis, determining, for each image in the set of one or more processed images, a set of virtual-camera parameters that describe the position and orientation for a virtual camera that produces a generated image from the time-projected three-dimensional model of the patient's teeth equivalent to the image in the set of one or more processed images, using, for each image in the set of one or more processed images, the standard type of view and additional metadata to generate an initial set of virtual-camera parameters for the image, using the standard type of view and additional metadata to determine a value for an iteration variable; carrying out a number of optimization iterations equal to the value of the iteration variable; and finally refining the virtual-camera parameters for the image, generating, for each image in the set of one or more processed images, a generated image corresponding to the image from the time-projected three-dimensional model of the patient's teeth and the virtual-camera parameters determined for the image, and comparing each image in the set of one or more processed images with the corresponding generated image to generate a comparison value for the image; determining, using the one or more comparison values, whether or not a configuration of the patient's teeth is within a threshold level of correspondence to the expected configuration of the patient's teeth; and storing an indication of the determination in one of the one or more electronic memories. 19. A dental-treatment monitoring system comprising: one or more processors;one or more electronic memories that store instructions and data;one or more mass-storage devices that store encoded images and patient information;a communications subsystem through which the dental-treatment monitoring system receives images and information from remote computer systems; andcomputer instructions, encoded in one or more of the one or more electronic memories, that control the dental-treatment monitoring system to store, in one or more data-storage devices selected from among the one or more electronic memories and one or more mass-storage devices, a three-dimensional model of a patient's teeth, receive, through the communications subsystem, one or more two-dimensional digital photographs of the patient's teeth taken at a time t during the course of a dental treatment, project, in time, the three-dimensional model of the patients teeth to the time t to generate and store a time-projected three-dimensional model of the patient's teeth representing an expected configuration of the patients teeth, compare one or more of the one or more two-dimensional digital photographs to corresponding two-dimensional digital images generated from the time-projected three-dimensional model of the patients teeth to generate one or more comparison values and generate, from the received one or more two-dimensional digital photographs, a set of one or more processed images with associated metadata for analysis, determine, for each image in the set of one or more processed images, a set of virtual-camera parameters that describe the position and orientation for a virtual camera that produces a generated image from the time-projected three-dimensional model of the patient's teeth equivalent to the image in the set of one or more processed images, generate, for each image in the set of one or more processed images, a generated image corresponding to the image from the time-projected three-dimensional model of the patients teeth and the virtual-camera parameters determined for the image, and compare each image in the set of one or more processed images with the corresponding generated image to generate a comparison value for the image and preparing, for each image, a teeth contour from the corresponding generated image; overlaying the teeth contour onto the image, generating a fitness metric for the image, corresponding image, and overlaid contour, wherein the fitness metric is based on a per-pixel cost equal to the normalized dot product of gradient vectors for the image and corresponding image computed for each pixel, determine, from the one or more comparison values, whether or not a configuration of the patient's teeth is within a threshold level of correspondence to the expected configuration of the patients teeth, and store an indication of the determination in one of the one or more electronic memories.

이 특허에 인용된 특허 (346)

IPC 상위 출원인

내보내기

상세정보
내보내기 구분	파일저장 인쇄 메일전송
구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	> 총 건의 자료가 검색되었습니다. > 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) > 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. > 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) > 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오 > ~ > Text(ASCII format) Excel format

과학기술 지식인프라 ScienceON

ScienceON Chatbot

연합인증

특허 상세정보

Photograph-based assessment of dental treatments and procedures

초록
▼

대표
청구항
▼

이 특허에 인용된 특허 (346)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

ScienceON Chatbot

연합인증

특허 상세정보

Photograph-based assessment of dental treatments and procedures

초록 ▼

대표청구항 ▼

이 특허에 인용된 특허 (346)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

초록
▼

대표
청구항
▼