公开(公告)号：US20190012816A1

公开(公告)日：2019-01-10

申请号：US16021102

申请日：2018-06-28

Applicant: SHIMADZU CORPORATION

Inventor： WATARU TAKAHASHI ,  Shinichiro Mori

IPC: G06T11/00 ,  G06T3/40 ,  G06T5/00 ,  H04N5/365

Abstract: A radiation imaging apparatus includes an irradiation element that irradiates a radiation, a radiation detection, an image generation element that generates a radiation image, a memory element that stores a principal component and a location detection element that detects and extracts a specific region from the radiation image by a matching using each contribution rate relative to each template image and each radiation image.

公开(公告)号：US20170291042A1

公开(公告)日：2017-10-12

申请号：US15473803

申请日：2017-03-30

Applicant: SHIMADZU CORPORATION

Inventor： WATARU TAKAHASHI

IPC: A61N5/10 ,  A61B6/03

Abstract: A positioning apparatus and a positioning method has a control element and function 40 includes a radiograph acquisition element 41 that acquires radiograph data detected by two radiography systems selected from a group consisting of a flat panel detector, a DRR (Digital Reconstructed Radiograph) generation element 42 that generates DRR in two different directions by virtually performing fluoroscopic projection relative to the 3-dimensional CT data obtained through the network 17, a positioning element 43 that positions a CT to the X-ray fluoroscopic radiograph obtained from two radiography systems, and a displacement distance calculation element 44 that calculates a displacement distance of the tabletop 31 based on the gap between radiographs for improved positioning. The positioning element 43 has a multidimensional optimization element 45 and a 1-dimensional optimization element 46 that optimize parameters relative to rotation and translation of the fluoroscopic projection to maximize an evaluation function that evaluates a matching degree between the DRR and the X-ray fluoroscopic radiograph.

公开(公告)号：US20180280727A1

公开(公告)日：2018-10-04

申请号：US15473708

申请日：2017-03-30

Applicant: SHIMADZU CORPORATION

Inventor： WATARU TAKAHASHI ,  Shinichiro MORI

IPC: A61N5/10 ,  A61B6/03 ,  G06T7/00 ,  G06T11/00

CPC classification number: A61N5/1049 ,  A61B6/032 ,  A61B6/035 ,  A61B6/04 ,  A61B6/52 ,  A61B6/5205 ,  A61B6/5211 ,  A61N2005/1061 ,  A61N2005/1062 ,  G06T7/0012 ,  G06T7/73 ,  G06T11/005 ,  G06T2207/10121 ,  G06T2207/10124 ,  G06T2207/20068

Abstract: A positioning apparatus automatically performs a patient positioning calculation at high speed and a positioning method. A positioning apparatus 40 has, as functional components, a DRR image generation element 41 that generates the DRR image based on the CT image data, an optimization element 43 that calculates the positional gap of the patient 57 by optimizing the fluoroscopic projection parameters; and an initial parameter adjustment element 42 that changes the initial position of the fluoroscopic projection parameters prior to optimization of fluoroscopic projection parameters with regard to the rotatable and translation of the CT image data relative to the optimization element 43.