1
Koichi Morishita, Shinji Omori, Shimbu Yamagata, Tetsuo Yokoyama, Koichi Sano, Akira Ogushi: Image registration method. Hitachi, Antonelli Terry & Wands, February 17, 1987: US04644582 (97 worldwide citation)

Two images to be registered are divided into a plurality of image portions. A standard point for the registration is extracted for each of the image portions divided. Coordinate transformations between two images for the registration are conducted for each image portion by using the standard point e ...


2
Koichi Morishita, Shimbu Yamagata, Tetsuo Okabe, Tetsuo Yokoyama, Kazuhiko Hamatani: Unsharp masking for image enhancement. Hitachi, Hitachi Medical Corporation, Antonelli Terry & Wands, December 27, 1988: US04794531 (77 worldwide citation)

In an unsharp masking processing for sharpening images such as radiographic images, an emphasizing coefficient of an image and parameters for real-time change of picture quality are set interactively. The entire image is divided into a plurality of regional images and filtering optimized for each pi ...


3
Koichi Sano, Akira Maeda, Tetsuo Yokoyama, Hideaki Koizumi: Magnetic resonance imaging method for moving object. Hitachi, Antonelli Terry Stout & Kraus, May 26, 1992: US05115812 (45 worldwide citation)

To obtain a high quality image at a vascular area at high speed: (1) there is used a pulse sequence which includes a bipolar phase encoding magnetic field, dephases a stationary area, and does not generate the first order moment; (2) phase distortions are estimated from measured data and removed, wi ...


4
Hiroyuki Sekiguchi, Koichi Sano, Tetsuo Yokoyama: Region extracting method and three-dimensional display method. Hitachi, Antonelli Terry Stout & Kraus, June 7, 1994: US05319551 (44 worldwide citation)

In order to ensure that region extraction for extracting a specified internal organ can be effected with high reliability, a region expansion method is applied by using a combination of an expansion condition taking the local density change into consideration and an expansion condition taking the gl ...


5
Koichi Morishita, Tetsuo Yokoyama, Kazuhiro Sato: System for automated transformation of gray level of image. Hitachi, Hitachi Medical Corporation, Antonelli Terry Stout & Kraus, September 22, 1992: US05150421 (38 worldwide citation)

Disclosed is an automated image gray level transformation system applied to a medical image processing work station for the purpose of dispensing with the prior art manual complex processing thereby improving the accuracy of diagnosis. The system carries out, in addition to its fundamental step of e ...


6
Tetsuo Yokoyama, Mitsuhisa Fujino, Yasunobu Yamazaki: Instrument panel. Mitsubishi Jidosha Kogyo Kabushiki Kaisha, January 12, 1999: US05857726 (26 worldwide citation)

An instrument panel is formed symmertrically with respect to a center of the panel. The instrument panel comprises a pair of recesses defined by left and right reinforcing/partition walls, and a pair of lower openings located under the recesses. A meter unit is mounted in the recess to oppose the dr ...


7
Koichi Homma, Fuminobu Komura, Tetsuo Yokoyama, Koichi Haruna, Toshihiro Furuya, Hiromi Kashiwabara, Akira Maeda, Yutaka Takuma, Takashi Iizumi: Image correction system for scanning electron microscope. Hitachi, Antonelli Terry & Wands, March 6, 1990: US04907287 (24 worldwide citation)

An image correcting apparatus for correcting distortion appearing in an image produced by electron beam scanning in a SEM under the influence of electric, magnetic and mechanical vibrations through arithmetic operations for eliminating the distortion. Installation of electric shield, magnetic shield ...


8
Koichi Sano, Tetsuo Yokoyama, Ryuzaburo Takeda: Blood flow imaging method. Hitachi, Antonelli Terry & Wands, April 10, 1990: US04915111 (23 worldwide citation)

A sequence for detecting variations in the blood flow speed in the blood vessel is added before a measurement of imaging signals so as to determine the highest and/or the lowest speed points of time and an examined body is imaged two times at those timings. In this way the timing for setting the del ...


9
Akira Maeda, Koichi Sano, Tetsuo Yokoyama, Hideaki Koizumi: Multi-dimensional magnetic resonance imaging method and apparatus for same. Hitachi, Pennie & Edmonds, January 4, 1994: US05275164 (22 worldwide citation)

A method and apparatus for MRI imaging capable of reducing the time between end of measurement and completion of image reconstruction by performing part of image reconstruction calculation in parallel with measurement of magnetic resonance signals, which particularly performs image reconstruction ca ...


10
Akira Maeda, Takashi Kasama, Tetsuo Yokoyama, Hiroshi Nishimura: Method and apparatus for correction of phase distortion in MR imaging system. Hitachi Medical Corporation, Hitachi, Hitachi Microcomputer Engineering, Pennie & Edmonds, May 19, 1992: US05113865 (19 worldwide citation)

In one aspect of correcting phase distortion in an MR imaging system at high speed and with high precision, partial regions having any shapes are established on a complex image reconstruction, linear phase distortion is estimated for every partial region and the phase distortion of the whole image i ...