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公开(公告)号：US20250157100A1
公开(公告)日：2025-05-15
申请号：US18509385
申请日：2023-11-15
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Qiulin TANG , Jian ZHOU , Liang CAI , Chih-Chieh LIU
Abstract: A medical image processing method includes obtaining a set of projection data acquired in a computed tomography (CT) scan of a three-dimensional region of an object to be examined; generating for each time point of a plurality of time points of the CT scan based on a part of the obtained set of projection data corresponding to the time point, a pair of feature maps for estimating motion at the time point so as to generate a plurality of pairs of feature maps, each feature map representing a feature of an image reconstructed from the part of the obtained set of projection data; estimating, based on the generated plurality of pairs of feature maps, a four-dimensional motion field; and reconstructing, based on the estimated four-dimensional motion field and the obtained set of projection data, a CT image of the object.
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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.
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3.发明公开公开(公告)号：US20230284997A1
公开(公告)日：2023-09-14
申请号：US17692697
申请日：2022-03-11
Applicant: CANON MEDICAL SYSTEMS CORPORATION
CPC classification number: A61B6/544 , G06T11/008 , A61B6/5258 , G06T2210/41 , G06T2200/04 , A61B6/025
Abstract: A method, apparatus, and computer-readable storage medium for controlling exposure/irradiation during a main three-dimensional X-ray imaging scan using at least one spatially-distributed characteristic of a pre-scan/scout scan preceding the main scan. The at least one spatially-distributed characteristic includes (1) a spatially-distributed noise characteristic of the pre-scan and/or (2) a spatially-distributed identification of exposure-sensitive tissue types. The at least one spatially-distributed characteristic can be calculated from images reconstructed from sinogram/projection data and/or from sinogram/projection directly using a neural network.
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4.发明申请公开(公告)号：US20220139006A1
公开(公告)日：2022-05-05
申请号：US17577689
申请日：2022-01-18
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Abstract: An information processing method of an embodiment is a processing method of information acquired by imaging performed by a medical image diagnostic apparatus, the information processing method includes the steps of: acquiring noise data by imaging a phantom using a medical imaging apparatus; based on first subject projection data acquired by the imaging performed by a medical image diagnostic modality of a same kind as the medical image diagnostic apparatus and the noise data, acquiring synthesized subject data in which noise based on the noise data is added to the first subject projection data; and acquiring a noise reduction processing model by machine learning using the synthesized subject data and second subject projection data acquired by the imaging performed by the medical image diagnostic modality.
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5.发明公开公开(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
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.
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Patent Agency Ranking
6.发明公开公开(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
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.
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公开(公告)号：US20220399101A1
公开(公告)日：2022-12-15
申请号：US17343519
申请日：2021-06-09
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Abstract: The present disclosure relates to a spatially-variant model of a point spread function and its role in enhancing medical image resolution. For instance, a method of the present disclosure comprises receiving a first medical image having a first resolution, applying a neural network to the first medical image, the neural network including a first subset of layers and, subsequently, a second subset of layers, the first subset of layers of the neural network generating, from the first medical image, a second medical image having a second resolution and the second subset of layers of the neural network generating, from the second medical image, a third medical image having a third resolution, and outputting the third medical image, wherein the first resolution is lower than the second resolution and the second resolution is lower than the third resolution.
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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
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.
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公开(公告)号：US20240398386A1
公开(公告)日：2024-12-05
申请号：US18329070
申请日：2023-06-05
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Ryosuke IWASAKI , Hiroki TAKAHASHI , Tomohisa IMAMURA , Ting XIA , Liang CAI , Jian ZHOU
Abstract: An ultrasound diagnosis apparatus of an embodiment includes storage circuitry and processing circuitry. The storage circuitry stores therein a trained model trained using a first ultrasound signal containing a saturated signal as input data and a second ultrasound signal in which effect of saturation is reduced from the first ultrasound signal, as target data. The processing circuitry inputs a third ultrasound signal containing a saturated signal to the trained model and acquires a fourth ultrasound signal that is output from the trained model and in which effect of saturation is reduced from the third ultrasound signal, to generate the fourth ultrasound signal.
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公开(公告)号：US20240389961A1
公开(公告)日：2024-11-28
申请号：US18323016
申请日：2023-05-24
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Tzu-Cheng LEE , Liang CAI , Jian ZHOU
Abstract: A method of controlling computed tomography (CT) scanning includes performing a scout CT scan of a 3D region of a head of a subject to be examined, using a CT gantry having an X-ray source and an X-ray detector both rotatably supported thereby, to produce image data. Anatomical landmarks are detected for identifying an orbitomeatal base line (OMBL), by inputting cross-sectional image data of the 3D region generated from the image data to a trained machine learning model. A tilt angle of the CT gantry is determined based on the detected anatomical landmarks. A diagnostic CT scan of the object is performed using the CT gantry tilted at the determined tilt angle.
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