公开(公告)号：US20230017788A1

公开(公告)日：2023-01-19

申请号：US17939014

申请日：2022-09-07

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Takuma IGARASHI ,  Satoshi WAKAI ,  Kazumasa ARAKITA ,  Hideaki ISHII ,  Yasuko FUJISAWA ,  Shigeo KAMINAGA ,  Kenji HIROHATA ,  Junichiro OOGA

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

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.

公开(公告)号：US20180214110A1

公开(公告)日：2018-08-02

申请号：US15886287

申请日：2018-02-01

Applicant: Canon Medical Systems Corporation

Inventor： Takuma IGARASHI

IPC: A61B6/00 ,  A61B5/08 ,  A61B6/03 ,  G06T7/00 ,  G06T7/11 ,  G06T7/174 ,  G06T11/00

CPC classification number: A61B6/5217 ,  A61B5/0806 ,  A61B6/032 ,  A61B6/463 ,  A61B6/466 ,  A61B6/488 ,  A61B6/50 ,  A61B6/5205 ,  A61B6/5288 ,  G06T7/0016 ,  G06T7/11 ,  G06T7/174 ,  G06T11/003 ,  G06T11/008 ,  G06T2207/10016 ,  G06T2207/10081 ,  G06T2207/30061 ,  G06T2211/412

Abstract: A medical image-processing apparatus of embodiments includes processing circuitry. The processing circuitry extracts plural regions corresponding to at least one of a lobe and a subsegment forming a lung from three-dimensional medical-image data that is acquired by imaging in temporal order. The processing circuitry calculates a physical index relating to respiratory activity for each of the extracted regions. The processing circuitry detects an abnormal region having an abnormality relating to the respiratory activity out of the regions by comparing temporal changes of the physical index of the respective regions. The processing circuitry outputs information indicating about the abnormal region.