公开(公告)号：US20250166247A1

公开(公告)日：2025-05-22

申请号：US18516450

申请日：2023-11-21

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Qiulin TANG ,  Jian ZHOU ,  Liang CAI ,  Chih-chieh LIU ,  Zhou YU

IPC: G06T11/00 ,  G06T7/11

Abstract: A method for performing cardiac motion compensation in a computed tomography (CT) imaging system is provided. The method includes receiving projection data acquired from an imaging object by the CT imaging system. The method also includes, until a predefined termination criterion is met, iteratively reconstructing, based on estimated cardiac motion, the received projection data to generate a motion-compensated image of the imaging object, determining a vessel region of interest (ROI) within the generated motion-compensated image, and updating the estimated cardiac motion, based on an optimization cost function associated with the determined vessel ROI. The method further includes outputting, as a final reconstructed image of the imaging object, the generated motion-compensated image.

公开(公告)号：US20240378496A1

公开(公告)日：2024-11-14

申请号：US18361238

申请日：2023-07-28

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Ting XIA ,  Jian ZHOU ,  Liang CAI ,  Zhou YU ,  Tomohisa IMAMURA ,  Ryosuke IWASAKI ,  Hiroki TAKAHASHI

IPC: G06N20/00

Abstract: A method for harmonic imaging is provided and includes inputting first training ultrasound data, including a fundamental component and a harmonic component, to each of a plurality of teacher models, and training each teacher model with the first training ultrasound as teacher input data and second training ultrasound data, including the harmonic component, as teacher target data; acquiring, for each teacher, corresponding first estimated data output from the teacher model, in response to input of first ultrasound data to the teacher model; selecting a first particular teacher model by evaluating the corresponding first estimated data output from each of the trained teacher models; and training a student model with the first ultrasound data as student input data and the corresponding first estimated data of the selected first particular teacher model as student target data.

公开(公告)号：US20240260942A1

公开(公告)日：2024-08-08

申请号：US18165433

申请日：2023-02-07

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Ryosuke IWASAKI ,  Hiroki TAKAHASHI ,  Tomohisa IMAMURA ,  Ting XIA ,  Liang CAI ,  Jian ZHOU ,  Zhou YU

IPC: A61B8/08

CPC classification number: A61B8/5207 ,  A61B8/488 ,  G01S7/5206

Abstract: An ultrasound diagnosis apparatus according to an embodiment includes processing circuitry. This processing circuitry collects a first ultrasound signal including one or more harmonic components. By executing weighed addition processing where a coefficient distribution is applied to the first ultrasound signal for different directions of two or more dimensions, the processing circuitry generates a second ultrasound signal including components of each order at a ratio different, at a specific frequency, from a ratio among the frequency components included in the first ultrasound signal.

公开(公告)号：US20230380788A1

公开(公告)日：2023-11-30

申请号：US17825650

申请日：2022-05-26

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Tzu-Cheng LEE ,  Jian ZHOU ,  Liang CAI ,  Zhou YU

IPC: A61B6/00 ,  A61B6/03

CPC classification number: A61B6/5205 ,  A61B6/032 ,  G06T11/008

Abstract: An information processing method processes an x-ray image including the steps of: obtaining first lower-radiation dose three-dimensional image data during a first scan of a patient; and detecting, using a trained neural network, a presence of an artifact (e.g., a metal artifact) in the first lower-radiation dose three-dimensional image data. An information processing apparatus includes processing circuitry for performing the detection method, and computer instructions stored in a non-transitory computer readable storage medium cause a computer processor to performing the detection method.

公开(公告)号：US20230145523A1

公开(公告)日：2023-05-11

申请号：US17680048

申请日：2022-02-24

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Masakazu MATSUURA ,  Jian ZHOU ,  Zhou YU

IPC: G06T11/00 ,  G06T7/30 ,  A61B6/00 ,  A61B6/03

CPC classification number: G06T11/008 ,  G06T7/30 ,  A61B6/5258 ,  A61B6/032 ,  G06T2207/10081 ,  G06T2207/20081 ,  G06T2207/10116 ,  A61B6/563

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry configured to acquire a radiographic image of a subject and acquire a post-processing image with reduced steak artifacts by applying a model that reduces streak artifacts to the radiographic image, wherein the model is generated by machine learning that uses, as a training data pair, a first radiographic image and a second radiographic image based on artifact generation processing for generating streak artifacts.

公开(公告)号：US20230326596A1

公开(公告)日：2023-10-12

申请号：US17718898

申请日：2022-04-12

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yujie LU ,  Liang CAI ,  Ting XIA ,  Jian ZHOU ,  Zhou YU

IPC: G16H50/20 ,  G06T7/00 ,  G06T11/00 ,  G06T7/11 ,  G06T7/62 ,  G16H30/40 ,  G06N3/08 ,  A61B6/12 ,  A61B6/03 ,  A61B6/00

CPC classification number: G16H50/20 ,  G06T7/0012 ,  G06T11/008 ,  G06T7/11 ,  G06T7/62 ,  G16H30/40 ,  G06N3/08 ,  A61B6/12 ,  A61B6/032 ,  A61B6/5258 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/30052 ,  G06T2207/10081

Abstract: A method of processing information acquired by imaging performed by a medical image diagnostic apparatus, the method including but not limited to at least one of (A) acquiring a training image volume including at least one three-dimensional object having an embedded three-dimensional feature having a first cross-sectional area in a first three-dimensional plane; selecting a second cross-sectional area in a second three-dimensional plane containing the embedded three-dimensional feature, wherein the second cross-sectional area is larger than the first cross-sectional area; and training an untrained neural network with an image of the second cross-sectional area generated from the training image volume; and (B) acquiring a first set of training data; determining a first distribution of tissue density information from the first set of training data; generating from the first set of training data a second set of training data by performing at least one of a tissue-density shifting process and a tissue-density scaling process; and training an untrained neural network with the first and second sets of training data to obtain a trained neural network.

公开(公告)号：US20230215058A1

公开(公告)日：2023-07-06

申请号：US17723894

申请日：2022-04-19

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Qiulin TANG ,  Thomas LABNO ,  Jian ZHOU ,  Liang CAI ,  Zhou YU

IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00 ,  G16H30/20

CPC classification number: G06T11/005 ,  A61B6/032 ,  A61B6/5205 ,  G16H30/20 ,  G06T2210/41

Abstract: A method, system, and computer readable medium to compensate for consecutive missing views in Computed Tomography (CT) reconstruction. By utilizing at least one complementary ray from a previous or subsequent view, the missing view(s) can be filled in. When plural complementary rays exist, a linear or non-linear combination of rays can be used to fill in the missing views, and the weights used in the combination may be smoothed to prevent over-emphasis of the replacement views.

公开(公告)号：US20230011759A1

公开(公告)日：2023-01-12

申请号：US17369596

申请日：2021-07-07

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yujie LU ,  Qiulin TANG ,  Zhou YU ,  Jian ZHOU

IPC: G06T5/20 ,  G06T5/50 ,  G06N3/08 ,  G16H30/40

Abstract: An apparatus, method, and computer-readable medium for improving image quality of a medical volume. In an embodiment, the apparatus includes processing circuitry configured to receive a reconstructed input image volume from X-ray projection data corresponding to a three-dimensional region of an object to be examined, apply a pseudo-three-dimensional neural network (P3DNN) to the reconstructed input image volume, the application of the pseudo-three-dimensional neural network including generating, for the reconstructed input image volume, a plurality of three-dimensional image datasets representing a different anatomical plane of the reconstructed input image volume, applying at least one convolutional filter to each of a sagittal plane dataset, a transverse plane dataset, and a coronal plane dataset, and concatenating results of the applied at least one convolutional filter to generate an intermediate output image volume, and generate, based on the application of the P3DNN, an output image volume corresponding to the three-dimensional region of the object.

公开(公告)号：US20200323508A1

公开(公告)日：2020-10-15

申请号：US16915722

申请日：2020-06-29

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Jian ZHOU ,  Zhou YU ,  Yan LIU

IPC: A61B6/00 ,  A61B6/04 ,  A61B6/02

Abstract: An apparatus and method are described using a forward model to correct pulse pileup in spectrally resolved X-ray projection data from photon-counting detectors (PCDs). To calibrate the forward model, which represents each order of pileup using a respective pileup response matrix (PRM), an optimization search determines the elements of the PRMs that optimize an objective function measuring agreement between the spectra of recorded counts affected by pulse pileup and the estimated counts generated using forward model of pulse pileup. The spectrum of the recorded counts in the projection data is corrected using the calibrated forward model, by determining an argument value that optimizes the objective function, the argument being either a corrected X-ray spectrum or the projection lengths of a material decomposition. Images for material components of the material decomposition are then reconstructed using the corrected projection data.

公开(公告)号：US20240032877A1

公开(公告)日：2024-02-01

申请号：US17875051

申请日：2022-07-27

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Chih-chieh LIU ,  Jian ZHOU ,  Qiulin TANG ,  Liang CAI ,  Zhou YU

IPC: A61B6/03 ,  A61B6/00 ,  G01N23/046

CPC classification number: A61B6/032 ,  A61B6/54 ,  G01N23/046 ,  A61B6/503

Abstract: An information processing method controls a CT scanner such that the method includes, but is not limited to, determining an X-ray irradiation period from an electrocardiogram acquired from an electrocardiography device attached to a living object to be imaged, by processing the electrocardiogram at multiple different cardiac phases; performing, by controlling a CT gantry including and rotatably supporting an X-ray source and an X-ray detector, a diagnostic CT scan in the determined X-ray irradiation period, of at least a part of the heart region, to obtain a CT image; and causing a display unit to display the obtained CT image. The method can be performed at least by an information processing apparatus including processing circuitry and/or computer instructions stored in a non-transitory computer readable storage medium for performing the method.