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Patent Agency Ranking
公开(公告)号：US11006917B2
公开(公告)日：2021-05-18
申请号：US16813134
申请日：2020-03-09
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Takuya Sakaguchi , Kenji Hirohata
Abstract: A medical-information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires medical image data that is obtained during imaging on the subject in a resting state in the time phase where the relationship between the volume of blood flow and the pressure in a blood vessel in the cardiac cycle of the subject indicates a proportional relationship. The processing circuitry extracts the structure of a blood vessel, included in the medical image data, applies fluid analysis to the structure of the blood vessel to obtain a first index value, which is obtained based on the pressure in the blood vessel on the upstream side of a predetermined position within the blood vessel and the relation equation between the volume of blood flow and the pressure in the blood vessel in the resting state, and a second index value, which is obtained based on the pressure in the blood vessel on the downstream side of the predetermined position and the relation equation, and calculates the pressure ratio, which is the ratio of the first index value to the second index value.
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公开(公告)号：US20200349708A1
公开(公告)日：2020-11-05
申请号：US16929392
申请日：2020-07-15
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Takuma IGARASHI , Satoshi Wakai , Kazumasa Arakita , Hideaki Ishii , Yasuko Fujisawa , Shigeo Kaminaga , Kenji Hirohata , Junichiro Odga
Abstract: There is provided a medical image processing apparatus which includes a first extraction unit configured to extract coronary arteries depicted in images of a plurality of time phases relating to the heart, and to extract at least one stenosed part depicted in each coronary artery; a calculation unit configured to calculate a pressure gradient of each of the extracted coronary arteries, based on tissue blood flow volumes of the coronary arteries; a second extraction unit configured to extract an ischemic region depicted in the images; and a specifying unit configured to specify a responsible blood vessel of the ischemic region by referring to a dominance map, in which each of the extracted coronary arteries and a dominance territory are associated, for the extracted ischemic region, and to specify a responsible stenosis, based on the pressure gradient corresponding to a stenosed part in the specified responsible blood vessel.
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公开(公告)号：US11481901B2
公开(公告)日：2022-10-25
申请号：US16929392
申请日：2020-07-15
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Takuma Igarashi , Satoshi Wakai , Kazumasa Arakita , Hideaki Ishii , Yasuko Fujisawa , Shigeo Kaminaga , Kenji Hirohata , Junichiro Ooga
Abstract: There is provided a medical image processing apparatus which includes a first extraction unit configured to extract coronary arteries depicted in images of a plurality of time phases relating to the heart, and to extract at least one stenosed part depicted in each coronary artery; a calculation unit configured to calculate a pressure gradient of each of the extracted coronary arteries, based on tissue blood flow volumes of the coronary arteries; a second extraction unit configured to extract an ischemic region depicted in the images; and a specifying unit configured to specify a responsible blood vessel of the ischemic region by referring to a dominance map, in which each of the extracted coronary arteries and a dominance territory are associated, for the extracted ischemic region, and to specify a responsible stenosis, based on the pressure gradient corresponding to a stenosed part in the specified responsible blood vessel.
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公开(公告)号：US10776960B2
公开(公告)日：2020-09-15
申请号：US16365500
申请日：2019-03-26
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Hideaki Ishii , Satoshi Wakai , Kazumasa Arakita , Takuma Igarashi , Yasuko Fujisawa , Shigeo Kaminaga , Kenji Hirohata , Junichiro Ooga
Abstract: According to one embodiment, a medical image diagnostic apparatus includes a storage memory, processing circuitry, and a display. The storage memory stores data of a plurality of FFR distribution maps constituting a time series regarding a coronary artery, and data of a plurality of morphological images corresponding to the time series. The processing circuitry converts the plurality of FFR distribution maps into a plurality of corresponding color maps, respectively. The display displays a plurality of superposed images obtained by superposing the plurality of color maps and the plurality of morphological images respectively corresponding in phase to the plurality of color maps. The display restricts display targets for the plurality of color maps based on the plurality of FFR distribution maps or the plurality of morphological images.
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公开(公告)号：US20200214659A1
公开(公告)日：2020-07-09
申请号：US16813134
申请日：2020-03-09
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Takuya Sakaguchi , Kenji Hirohata
Abstract: A medical-information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry acquires medical image data that is obtained during imaging on the subject in a resting state in the time phase where the relationship between the volume of blood flow and the pressure in a blood vessel in the cardiac cycle of the subject indicates a proportional relationship. The processing circuitry extracts the structure of a blood vessel, included in the medical image data, applies fluid analysis to the structure of the blood vessel to obtain a first index value, which is obtained based on the pressure in the blood vessel on the upstream side of a predetermined position within the blood vessel and the relation equation between the volume of blood flow and the pressure in the blood vessel in the resting state, and a second index value, which is obtained based on the pressure in the blood vessel on the downstream side of the predetermined position and the relation equation, and calculates the pressure ratio, which is the ratio of the first index value to the second index value.
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