Patents by Inventor Yasutake Yasuhara
Yasutake Yasuhara 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).
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Patent number: 8598879Abstract: A magnetic resonance diagnostic apparatus is configured in such a manner that: a high-frequency transmission coil transmits a high-frequency electromagnetic wave at a magnetic resonance frequency to an examined subject; a heating coil performs a heating process by radiating a high-frequency electromagnetic wave onto the examined subject at a frequency different from the magnetic resonance frequency; based on a magnetic resonance signal, a measuring unit measures the temperature of the examined subject changing due to the high-frequency electromagnetic wave radiated by the heating coil; and a control unit exercises control so that the measuring unit measures the temperature while the heating coil is performing the heating process, by ensuring that the transmission of the high-frequency electromagnetic wave by the high-frequency transmission coil and the radiation of the high-frequency electromagnetic wave by the heating coil are performed in parallel.Type: GrantFiled: May 16, 2011Date of Patent: December 3, 2013Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Yoshitomo Sakakura, Satoshi Sugiura, Tomoyuki Yoshida, Takashi Yanashima, Masateru Iwasa, Yutaka Kato, Koji Kitamura, Kazuto Nogami, Hidekazu Tanaka, Makoto Sato, Shigehide Kuhara, Taketo Kawakami, Yasutake Yasuhara, Hiroshi Sugimoto
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Publication number: 20110279116Abstract: A magnetic resonance diagnostic apparatus is configured in such a manner that: a high-frequency transmission coil transmits a high-frequency electromagnetic wave at a magnetic resonance frequency to an examined subject; a heating coil performs a heating process by radiating a high-frequency electromagnetic wave onto the examined subject at a frequency different from the magnetic resonance frequency; based on a magnetic resonance signal, a measuring unit measures the temperature of the examined subject changing due to the high-frequency electromagnetic wave radiated by the heating coil; and a control unit exercises control so that the measuring unit measures the temperature while the heating coil is performing the heating process, by ensuring that the transmission of the high-frequency electromagnetic wave by the high-frequency transmission coil and the radiation of the high-frequency electromagnetic wave by the heating coil are performed in parallel.Type: ApplicationFiled: May 16, 2011Publication date: November 17, 2011Inventors: Yoshitomo Sakakura, Satoshi Sugiura, Tomoyuki Yoshida, Takashi Yanashima, Masateru Iwasa, Yutaka Kato, Koji Kitamura, Kazuto Nogami, Hidekazu Tanaka, Makoto Sato, Shigehide Kuhara, Taketo Kawakami, Yasutake Yasuhara, Hiroshi Sugimoto
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Patent number: 7612562Abstract: Support information including at least a setting image showing a present configuration of placing a patient on a bed and a present configuration of placing an RF coil for the patient is displayed. As necessary, the support information is displayed while including the position of a virtual magnetic field center corresponding to the position of a magnetic field center in the case of moving the bed into a gantry. The displayed support information is stored at a predetermined timing and can be read arbitrarily. By observing the displayed support information, the operator can promptly and easily determine whether the placement configuration of the patient and that of the RF coil at present are proper or not, and can accurately correct the placement configuration of the patient or the RF coil.Type: GrantFiled: July 15, 2008Date of Patent: November 3, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventor: Yasutake Yasuhara
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Publication number: 20090021257Abstract: Support information including at least a setting image showing a present configuration of placing a patient on a bed and a present configuration of placing an RF coil for the patient is displayed. As necessary, the support information is displayed while including the position of a virtual magnetic field center corresponding to the position of a magnetic field center in the case of moving the bed into a gantry. The displayed support information is stored at a predetermined timing and can be read arbitrarily. By observing the displayed support information, the operator can promptly and easily determine whether the placement configuration of the patient and that of the RF coil at present are proper or not, and can accurately correct the placement configuration of the patient or the RF coil.Type: ApplicationFiled: July 15, 2008Publication date: January 22, 2009Inventor: Yasutake Yasuhara
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Patent number: 7218106Abstract: A magnetic resonance imaging apparatus of the invention comprises a static magnetic field generation unit which generates a static magnetic field in a gantry, a gradient magnetic field generation unit which applies a gradient magnetic field to a object in the static magnetic field, a radio frequency coil which receives a magnetic resonance signal from the object to which the gradient magnetic field is applied, a contour detection unit which detects a contour of the object, a coil movement unit which moves the radio frequency coil on the basis of the detected contour while the radio frequency coil is placed near and far relative to the object, and an image generation unit which generates a magnetic resonance image on the basis of the received magnetic resonance signal.Type: GrantFiled: September 28, 2004Date of Patent: May 15, 2007Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Yasutake Yasuhara, Kazuya Okamoto, Masaaki Yamanaka, Manabu Ishii, Tsutomu Igarashi, Shigehide Kuhara
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Patent number: 7071693Abstract: A magnetic resonance imaging apparatus generates an MR signal from an object to be examined by applying a gradient field pulse generated by a gradient field coil and a high-frequency magnetic field pulse generated by a high-frequency coil to the object in a static field generated by a static field magnet, and reconstructs an image on the basis of the MR signal. The gradient field coil is housed in a sealed vessel. Numerous techniques are disclosed to reduce adverse effects of vibrations caused by rapidly changing gradient coil currents. By judicious use of non-conducting connection components between gantry components at some joint portions requiring electrical contact and at some other portions not requiring electrical contact, the generation of adverse B waves, and/or induced electron flow in response to physical vibration between joint components can be reduced.Type: GrantFiled: November 26, 2002Date of Patent: July 4, 2006Assignee: Kabushiki Kaisha ToshibaInventor: Yasutake Yasuhara
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Publication number: 20050122108Abstract: A magnetic resonance imaging apparatus of the invention comprises a static magnetic field generation unit which generates a static magnetic field in a gantry, a gradient magnetic field generation unit which applies a gradient magnetic field to a object in the static magnetic field, a radio frequency coil which receives a magnetic resonance signal from the object to which the gradient magnetic field is applied, a contour detection unit which detects a contour of the object, a coil movement unit which moves the radio frequency coil on the basis of the detected contour while the radio frequency coil is placed near and far relative to the object, and an image generation unit which generates a magnetic resonance image on the basis of the received magnetic resonance signal.Type: ApplicationFiled: September 28, 2004Publication date: June 9, 2005Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasutake Yasuhara, Kazuya Okamoto, Masaaki Yamanaka, Manabu Ishii, Tsutomu Igarashi, Shigehide Kuhara
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Patent number: 6859035Abstract: A magnetic resonance imaging apparatus generates an MR signal from an object to be examined by applying a gradient field pulse generated by a gradient field coil and a high-frequency magnetic field pulse generated by a high-frequency coil to the object in a static field generated by a static field magnet, and reconstructs an image on the basis of the MR signal. The gradient field coil is housed in a sealed vessel. Numerous techniques are disclosed to reduce adverse effects of vibrations caused by rapidly changing gradient coil currents. By judicious use of non-conducting connection components between gantry components at some joint portions requiring electrical contact and at some other portions not requiring electrical contact, the generation of adverse B waves, and/or induced electron flow in response to physical vibration between joint components can be reduced.Type: GrantFiled: November 26, 2002Date of Patent: February 22, 2005Assignee: Kabushiki Kaisha ToshibaInventor: Yasutake Yasuhara
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Publication number: 20030107376Abstract: A magnetic resonance imaging apparatus generates an MR signal from an object to be examined by applying a gradient field pulse generated by a gradient field coil and a high-frequency magnetic field pulse generated by a high-frequency coil onto the object in a static field generated by a static field magnet, and reconstructs an image on the basis of the MR signal. The gradient field coil is housed in a sealed vessel. A cable extending from an external power supply and connected to the gradient field coil has predetermined flexibility.Type: ApplicationFiled: November 26, 2002Publication date: June 12, 2003Applicant: KABUSHIKI KAISHA TSOHIBAInventor: Yasutake Yasuhara
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Publication number: 20010022515Abstract: A magnetic resonance imaging apparatus generates an MR signal from an object to be examined by applying a gradient field pulse generated by a gradient field coil and a high-frequency magnetic field pulse generated by a high-frequency coil onto the object in a static field generated by a static field magnet, and reconstructs an image on the basis of the MR signal. The gradient field coil is housed in a sealed vessel. A cable extending from an external power supply and connected to the gradient field coil has predetermined flexibility.Type: ApplicationFiled: January 19, 2001Publication date: September 20, 2001Inventors: Masatoshi Yamashita, Manabu Ishii, Yoshitomo Sakakura, Hiromitsu Takamori, Kazuto Nakabayashi, Yoshinori Hamamura, Shinji Mitsui, Yasutake Yasuhara