Patents Assigned to Ken Ishihara
  • Patent number: 6061583
    Abstract: A noninvasive blood analyzer is provided which comprises: a light source for illuminating a part of tissues of a living body including a blood vessel; an image pickup section for picking up an image of the illuminated blood vessel and tissues; and an analyzing section for analyzing the picked image; the analyzing section including an extracting section for extracting image density distribution across the blood vessel in the image as an image density profile, a quantifying section for quantifying configurational characteristics of the image density profile, a computing section for computing the concentration of a blood constituent on the basis of the quantified characteristics, and an outputting section for outputting a computation result. The blood analyzer can measure the concentration of blood hemoglobin and the hematocrit in real time with an improved repeatability without blood sampling.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: May 9, 2000
    Assignee: Sysmex Corporation and Ken Ishihara
    Inventors: Ken Ishihara, Kaoru Asano, Yasuhiro Kouchi, Hideo Kusuzawa
  • Patent number: 5325859
    Abstract: An ultrasonic diagnosis apparatus comprises an ultrasonic wave transmitting/receiving unit for transmitting ultrasonic signals to a subject and receiving reflected echo signals reflected from the subject; a unit for controlling the ultrasonic wave transmitting/receiving unit such that the ultrasonic signals repetitively scan the subject at a predetermined scan period; an image memory unit for storing a plurality of image data pieces; a detection unit for detecting biophysical signals of the subject; a unit for setting a reference timing on the basis of the biophysical signals; an image display unit for displaying an image corresponding to the image data piece being delivered out of the image memory unit, the image display unit displaying the image at a predetermined display unit; a unit for controlling the image memory unit so as to store the plurality of image data pieces based on the reflected echo signals, wherein the plurality of image data pieces respectively correspond to two-dimensional images of the s
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: July 5, 1994
    Assignees: Ken Ishihara, Hitachi Medical Corp.
    Inventors: Ken Ishihara, Toshihiko Kawano
  • Patent number: 5241473
    Abstract: The present invention includes an ultrasonic diagnostic apparatus for forming differential image data by performing differential operation among topographic image data obtained in time series, an apparatus for giving color codes which designate display colors to differential image data, an apparatus for cumulating a plurality of frames of differential image data, and an apparatus for displaying respective cumulated differential images in colors designated by the color codes in which motion of a moving portion of a patient's body is displayed in colors by superposing a plurality of differential images.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: August 31, 1993
    Assignees: Ken Ishihara, Hitachi Medical Corporation
    Inventors: Ken Ishihara, Hiroya Kondo, Akihiro Ueyama, Toshio Ogawa, Shinji Kishimoto
  • Patent number: 5224481
    Abstract: An image displaying method in an ultrasonic diagnostic apparatus obtains differential image data between first image data and second image data in image data sequentially obtained from an echo signal received by transmitting an ultrasonic wave to a body to be examined. A time difference between a point of time, where the first image data are measured, and another point of time, where the second image data are measured is determined. A synthesized image data capable of displaying simultaneously a differential image and the time difference by combining the differential image data and data representing the time difference is obtained and displayed.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: July 6, 1993
    Assignees: Ken Ishihara, Jun Tanouchi, Hitachi Medical Corporation
    Inventors: Ken Ishihara, Jun Tanouchi, Takashi Sugiyama, Shinji Kishimoto