Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Masahiro Endo"'
Publikováno v:
SPIE Proceedings.
Failures of engineering components caused by rolling contact fatigue, such as flaking in bearings, are closely related to the initiation and growth of share-mode, i.e. Modes II and III, fatigue cracks. In order to evaluate quantitatively the fatigue
Autor:
Masahiko Suzuki, Masahiro Endo, Sin-ichiro Mori, Hideaki Haneishi, Hideshige Moriya, Takahiro Kohno
Publikováno v:
SPIE Proceedings.
Acquisition and analysis of three-dimensional movement of knee joint is desired in orthopedic surgery. We have developed two methods to obtain dynamic volume images of knee joint. One is a 2D/3D registration method combining a bi-plane dynamic X-ray
Autor:
Shinichi Wada, Kohei Murao, Toru Matsumoto, Akira Furukawa, Masahiro Endo, Shinji Yamamoto, Mitsuomi Matsumoto, Shusuke Sone
Publikováno v:
SPIE Proceedings.
The purpose of our research is to make clear the mechanism that a reader (physician or radiological technologist) effectively identify abnormal findings in CT images of lung cancer screening by using with CAD system. A method guessing the 2X2 decisio
Autor:
Shinichiro Mori, Kazutoshi Kohno, Shinichi Minohara, Masahiro Endo, Hiroshi Asakura, Ryosuke Kohno, Kenya Murase, Hideaki Fujiwara
Publikováno v:
Medical Imaging 2005: Physics of Medical Imaging.
The conventional respiratory-gated CT scan technique includes anatomic motion induced artifacts due to the low temporal resolution. They are a significant source of error in radiotherapy treatment planning for the thorax and upper abdomen. Temporal r
Autor:
Yuichi Fujino, Shinji Yamamoto, Michiomi Matsumoto, Kohei Murao, Shinichi Wada, Toru Matsumoto, Keichi Nagao, Akira Furukawa, Ryutaro Kakinuma, Masahiro Endo, Nobusuke Sone
Publikováno v:
SPIE Proceedings.
The increasing number of CT images to be interpreted in mass screening requires radiologists to interpret a huge number of CT images, and the capacity for screening has therefore been limited by the capacity to process images. To remedy this situatio
Publikováno v:
SPIE Proceedings.
We have developed a four-dimensional CT (4D CT) using continuous rotation of cone-beam x-ray. The maximum nominal beam width of the 4D CT is 128 mm at the center of rotation in the longitudinal direction. In order to obtain appropriate estimations of
Autor:
Hiroshi Aradate, Masahiro Endo, Yasuo Saito, Satoshi Matsushita, Masahiro Kusakabe, Shinichiro Mori, Hiroaki Miyazaki, Takanori Tsunoo, Kazumasa Sato, Shuzi Tanada, Susumu Kandatsu
Publikováno v:
SPIE Proceedings.
We have developed a prototype of 4-dimensional (4D) CT-scanner that employs continuous rotation of cone-beam. Because a cone-beam scan along a circle orbit did not collect a complete set of data to make rigid reconstruction of volume (3D image), it m
Autor:
Nobuyuki Nakamori, Masahiro Endo, Yasuo Yoshida, Kazumasa Sato, Yi-Qiang Yang, Takanori Tsunoo
Publikováno v:
Medical Imaging: Image Processing
We have developed a method to remove the noise from the cone beam CT image and consider the reduction of a patient's dose. In diagnostic medicine, cone beam CT increases a patient' exposure dose. The X-ray CT image is degraded by the noise that is ca
Autor:
Nobuyuki Nakamori, Takanori Tsunoo, Masahiro Endo, Kazumasa Sato, Yi-Qiang Yang, Yasuo Yoshida
Publikováno v:
SPIE Proceedings.
We have examined the characteristic of a flat-panel detector used for our cone-beam CT scanner. We calculated detection efficiency, the modulation transfer function and the noise characteristic of flat-panel detector by the Monte Carlo method, and co
Autor:
Yasushi Fukuda, Satoshi Matsusita, Masahiro Kusakabe, Kazumasa Satoh, Masahiro Endo, Takanori Tsunoo
Publikováno v:
Medical Imaging 2001: Physics of Medical Imaging.
An active matrix flat-panel imager (FPI) is a good candidate for the 2-dimensional detector of cone beam CT (CBCT), because it has a wider dynamic range and less geometrical distortion than video-fluoroscopic system so far employed. However the perfo