Patents by Inventor Tsuneo Maeda

Tsuneo Maeda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7057389
    Abstract: A nuclear magnetic resonance diagnosing apparatus for continuously taking tomograms in a space formed between a pair of magnets includes a cylindrical table top support of a gantry side, a pair of magnets vertically arranged, a table top support of the gantry side being interposed between the pair of magnets; and a column for supporting at least the magnet arranged in an upper side between the pair of magnets. The column is formed so that between a gantry and an examining table body, a width between a bridge construction, which is provided between the column and the table top support of the gantry side, and the table top support of the gantry side may be smaller than an examination width L determined by lines R? passing through a center of the table top support of the gantry side perpendicular to a center line R.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: June 6, 2006
    Assignee: Hitachi Medical Corporation
    Inventors: Seiji Kamimura, Ryosuke Fukami, Isamu Takekoshi, Masakatsu Iwasaki, Hitoshi Yoshino, Tsuneo Maeda
  • Publication number: 20040232916
    Abstract: In order to improve accessibility of a doctor or the others to an examined person by forming continuous wide open-space area around a table top support of gantry side, in a nuclear magnetic resonance diagnosing apparatus for continuously taking tomograms of the examined person in a space formed between a pair of magnets comprising the cylindrical table top support of gantry side 11; the pair of magnets 4 and 5 vertically arranged, the table top support of gantry side being interposed between the pair of magnets; and a column 6 for supporting at least the magnet arranged in an upper side between the pair of magnets, the nuclear magnetic resonance diagnosing apparatus further comprises a support system such as a bed 3 having a slide table 43 sliding on the table top support of gantry side 11; a slide table support means 45 for mounting the slide table, the slide support means being arranged in a periphery of the table top support of gantry side and in a radial direction along the periphery; and a slide drive un
    Type: Application
    Filed: December 22, 2003
    Publication date: November 25, 2004
    Inventors: Seiji Kamimura, Ryosuke Fukami, Isamu Takekoshi, Masakatsu Iwasaki, Hitoshi Yoshino, Tsuneo Maeda
  • Patent number: 6812702
    Abstract: A magnetic resonance imaging apparatus configured using a single column for supporting magnet devices disposed above and below the apparatus, wherein peripheries of yokes covering the magnet devices are formed to be arcs, thereby improving openness and accessibility of an operator to an object under examination.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: November 2, 2004
    Assignee: Hitachi Medical Corporation
    Inventors: Hitoshi Yoshino, Tsuneo Maeda
  • Patent number: 6778849
    Abstract: A body probe for MRI has a base coil portion, two side coil portions to be connected to side-coil connecting portions provided on both sides of the base coil portion, and a center coil portions which connects the two side coil portions at the center of the chest of the subject. Each side coil portion is made of a soft member and has a flexible coil embedded inside, so that the side coil portion can have a shape which matches the side surface of the subject. Provided at the center of the two side coil portions which are to be connected to the center coil portions at the chest of the subject is a fixing band for fixing the side coil portions and the center coil portion in close contact with the subject.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: August 17, 2004
    Assignee: Hitachi Medical Corporation
    Inventors: Atsushi Ninomiya, Ryosuke Fukami, Isamu Takekoshi, Tsuneo Maeda, Shizuka Nagai
  • Publication number: 20030110564
    Abstract: A magnetic resonance imaging apparatus configured using a single column for supporting magnet devices disposed above and below the apparatus, wherein peripheries of yokes covering the magnet devices are formed to be arcs, thereby improving openness and accessibility of an operator to an object under examination.
    Type: Application
    Filed: December 30, 2002
    Publication date: June 19, 2003
    Inventors: Hitoshi Yoshino, Tsuneo Maeda
  • Patent number: 6236210
    Abstract: A magnetic resonance imaging system includes a lower body which has a flat upper surface, and contains a first magnetic pole, an upper body which has a lower surface disposed in opposed relation to the upper surface of the lower body, and contains a second magnetic pole, a bed disposed adjacent to the lower body, and a pair of support posts which are provided respectively on right and left sides of the lower body, and interconnect the lower body and the upper body. A space, formed between the lower surface of the upper body and the upper surface of the lower body, is open at least toward the bed between the pair of right and left support posts.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: May 22, 2001
    Assignee: Hitachi Medical Corp.
    Inventors: Isamu Takekoshi, Masahito Saegusa, Mitsuru Ohnuma, Atsushi Ninomiya, Atsushi Katayama, Shigeru Sato, Tsuneo Maeda
  • Patent number: 6218837
    Abstract: A magnetic resonance imaging system includes a lower body which has a flat upper surface, and contains a first magnetic pole, an upper body which has a lower surface disposed in opposed relation to the upper surface of the lower body, and contains a second magnetic pole, a bed disposed adjacent to the lower body, and a pair of support posts which are provided respectively on right and left sides of the lower body, and interconnect the lower body and the upper body. A space, formed between the lower surface of the upper body and the upper surface of the lower body, is open at least toward the bed between the pair of right and left support posts.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: April 17, 2001
    Assignee: Hitachi Medical Corporation
    Inventors: Isamu Takekoshi, Masahito Saegusa, Mitsuru Ohnuma, Atsushi Ninomiya, Atsushi Katayama, Shigeru Sato, Tsuneo Maeda
  • Patent number: 6215308
    Abstract: A magnetic resonance imaging system includes a lower body which has a flat upper surface, and contains a first magnetic pole, an upper body which has a lower surface disposed in opposed relation to the upper surface of the lower body, and contains a second magnetic pole, a bed disposed adjacent to the lower body, and a pair of support posts which are provided respectively on right and left sides of the lower body, and interconnect the lower body and the upper body. A space, formed between the lower surface of the upper body and the upper surface of the lower body, is open at least toward the bed between the pair of right and left support posts.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: April 10, 2001
    Assignee: Hitachi Medical Corp.
    Inventors: Isamu Takekoshi, Masahito Saegusa, Mitsuru Ohnuma, Atsushi Ninomiya, Atsushi Katayama, Shigeru Sato, Tsuneo Maeda
  • Patent number: 6049208
    Abstract: A magnetic resonance imaging system includes a lower body which has a flat upper surface, and contains a first magnetic pole, an upper body which has a lower surface disposed in opposed relation to the upper surface of the lower body, and contains a second magnetic pole, a bed disposed adjacent to the lower body, and a pair of support posts which are provided respectively on right and left sides of the lower body, and interconnect the lower body and the upper body. A space, formed between the lower surface of the upper body and the upper surface of the lower body, is open at least toward the bed between the pair of right and left support posts.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: April 11, 2000
    Assignee: Hitachi Medical Corporation
    Inventors: Isamu Takekoshi, Masahito Saegusa, Mitsuru Ohnuma, Atsushi Ninomiya, Atsushi Katayama, Shigeru Sato, Tsuneo Maeda
  • Patent number: 5365174
    Abstract: In a magnetic resonance imaging apparatus, picture quality of a tomographic image is prevented from deteriorating by reducing the influence due to a change in environmental magnetic field around magnetic field generating means. A phase correcting circuit for correcting the phase of a correcting current supplied to correcting magnetic field coils is provided in a correction control circuit which amplifies a detection signal representative of the change in the environmental magnetic field from a magnetic field sensor. This enables to correct the phase of a correcting magnetic field generated from the correcting magnetic field coils. The difference between the phase of the change in the environmental magnetic field and the correcting magnetic field generated by the correcting magnetic field coils can be reduced.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: November 15, 1994
    Assignee: Hitachi Medical Corporation
    Inventors: Mutsumi Yoshikata, Tsuneo Maeda
  • Patent number: 5155436
    Abstract: Method and apparatus of stabilizing uniformity of a static magnetic field in a magnetic resonance imaging apparatus, wherein before adjustment of uniformity of the static magnetic field and before each actual imaging operation, pulse-like gradient magnetic fields are applied to a static magnetic field generating magnetic circuit at a maximum output level of power supplies for generation of gradient magnetic fields so as to magnetize the static magnetic field generating magnetic circuit to constant magnetization intensity.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: October 13, 1992
    Assignee: Hitachi Medical Corporation
    Inventors: Katsunori Suzuki, Tsuneo Maeda, Motonari Nasuhara, Shigeru Sato
  • Patent number: 4564001
    Abstract: A vessel for use with a high-frequency induction heater, having a bottom wall adapted to be heated by the induction heater for heating fluid contents of the vessel. At least the bottom wall is made from a cladding composite which consists of an aluminum alloy layer and a stainless steel layer clad with each other under pressure. The aluminum alloy layer is disposed on the inner side of the vessel, and consists of not more than 0.30 wt % of Si, not more than 0.7 wt % of iron, not more than 0.25 wt % of copper, 1.0-1.5 wt % of manganese, 0.8-1.3 wt % of magnesium, not more than 0.25 wt % of zinc, and the balance being aluminum.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: January 14, 1986
    Assignees: The Nippon Aluminium Mfg. Co., Ltd., The Nippon Alumi Tsurmuraru Corp. Co.
    Inventor: Tsuneo Maeda
  • Patent number: D325632
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: April 21, 1992
    Assignee: Hitachi Medical Co., Ltd.
    Inventors: Hiroyuki Kogane, Akitaka Takeuchi, Tsuneo Maeda, Motonari Nasuhara