Patents by Inventor Naoyuki Furudate
Naoyuki Furudate 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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Publication number: 20240085507Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a processing circuit. The processing circuit is configured to predict, based on an imaging sequence of magnetic resonance imaging and a relationship between a driving frequency of a gradient field coil and one of a magnet internal pressure and a magnet temperature of a static field magnet, the one of the magnet internal pressure and the magnet temperature at the time of execution of the imaging sequence, adjusts the imaging sequence based on a prediction result, and execute the adjusted imaging sequence.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Applicant: Canon Medical Systems CorporationInventors: Yutaka MACHII, Naoyuki FURUDATE, Motohiro MIURA
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Patent number: 11693073Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry configured, on a basis of one or both of (A) a parameter related to applying one of inversion and flip pulses and (B) an intensity of a slice selecting gradient magnetic field applied together with the one of the pulses in relation to selecting a slice to which the one of the pulses is applied, to determine one or both of (A) a parameter related to applying the other of the inversion and (B) flip pulses; and an intensity of the slice selecting gradient magnetic field applied together with the other of the pulses in relation to selecting a slice to which the other of the pulses is applied.Type: GrantFiled: October 28, 2021Date of Patent: July 4, 2023Assignee: CANON MEDICAL SYSTEMS CORPORATIONInventors: Ryohei Takayanagi, Hiroki Kondo, Masaaki Umeda, Naoyuki Furudate
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Publication number: 20220137171Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry configured, on a basis of one or both of (A) a parameter related to applying one of inversion and flip pulses and (B) an intensity of a slice selecting gradient magnetic field applied together with the one of the pulses in relation to selecting a slice to which the one of the pulses is applied, to determine one or both of (A) a parameter related to applying the other of the inversion and (B) flip pulses; and an intensity of the slice selecting gradient magnetic field applied together with the other of the pulses in relation to selecting a slice to which the other of the pulses is applied.Type: ApplicationFiled: October 28, 2021Publication date: May 5, 2022Applicant: CANON MEDICAL SYSTEMS CORPORATIONInventors: Ryohei TAKAYANAGI, Hiroki KONDO, Masaaki UMEDA, Naoyuki FURUDATE
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Patent number: 10598740Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a temperature sensor and a processing circuit. The temperature sensor acquires a temperature. The processing circuit calculates, based on information on an imaging sequence in which magnetic resonance imaging is to be performed, an estimated value of consumption energy of a gradient coil in a case when the imaging sequence is executed and calculates, based on the temperature acquired by the temperature sensor and the estimated value of the consumption energy, an estimated value of a temperature of the gradient coil, the temperature of the gradient coil undergoing changes as the imaging sequence is executed.Type: GrantFiled: July 29, 2016Date of Patent: March 24, 2020Assignee: Canon Medical Systems CorporationInventors: Yuki Takai, Naoyuki Furudate, Masaaki Nagashima, Yutaka Machii
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Patent number: 10413214Abstract: A magnetic resonance imaging apparatus includes a processor and a memory. The memory stores processor-executable instructions that, when executed by the processor, cause the processor to receive a breath holdable time of a subject and adjust a parameter value of an imaging parameter included in imaging condition for imaging of the subject, according to the breath holdable time.Type: GrantFiled: February 23, 2015Date of Patent: September 17, 2019Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Naoyuki Furudate, Sayo Syukuri
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Patent number: 10416255Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a gradient coil, power supply circuitry, and control circuitry. The gradient coil generates a gradient magnetic field. The power supply circuitry supply power to the gradient coil, the power being required by the gradient. The control circuitry temporarily change an upper limit value of power to be supplied by the power supply circuitry to a second value higher than a first value as a rated value based on the power required by the gradient coil.Type: GrantFiled: November 23, 2016Date of Patent: September 17, 2019Assignee: Canon Medical Systems CoprporationInventors: Sho Kawajiri, Naoyuki Furudate, Yutaka Machii
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Patent number: 10401449Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processing circuit and a sequence control circuit. The processing circuit calculates, based on an imaging sequence to be executed in magnetic resonance imaging, a value of a current flowing through a closed circuit by using an equivalent circuit and determines, prior to an execution of the imaging sequence, based on the value of the current, whether it is acceptable to execute the imaging sequence. The sequence control circuit executes the imaging sequence. The equivalent circuit is an equivalent circuit for a circuit that includes a gradient coil and that has a first circuit and a second circuit. The first circuit is connected to a power supply and has self-inductance. The second circuit includes at least one closed circuit having mutual inductance with the first circuit.Type: GrantFiled: July 28, 2016Date of Patent: September 3, 2019Assignee: Canon Medical Systems CorporationInventors: Yutaka Machii, Naoyuki Furudate, Sho Kawajiri, Motohiro Miura
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Patent number: 10371772Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a gradient magnetic field power supply, a voltmeter, and processing circuitry. The gradient magnetic field power supply includes an amplifier amplifying an input signal based on information of a gradient magnetic field waveform and outputting the amplified input signal to a gradient coil, a power supply device supplying power to the amplifier, and a capacitor bank supplying power, together with the power supply device, to the amplifier. The voltmeter measures a voltage of the capacitor bank. The processing circuitry calculates frequency characteristics of an impedance of the gradient coil, based on a voltage variation of the capacitor bank which was measured by the voltmeter, and controls imaging in accordance with the calculated frequency characteristics.Type: GrantFiled: December 13, 2016Date of Patent: August 6, 2019Assignee: Canon Medical Systems CorporationInventors: Sho Kawajiri, Motohiro Miura, Naoyuki Furudate, Yutaka Machii
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Patent number: 10258254Abstract: An MRI prep scan acquires plural sets of echo signals at a plurality of cardiac time phases which are mutually different from each other for each slice and used to generate a plurality of respectively corresponding prep images. Reference information is acquired and displayed for determining a first cardiac time phase and a second cardiac time phase on the basis of the prep images. The first and second cardiac time phases are set in response to an operator's specification. An imaging scan section for acquiring imaging echo signals by performing an imaging scan is performed upon each of the first and second cardiac time phases to acquire imaging echo signals. A first image is generated based on an echo signal of the first cardiac time phase and a second image is generated based on an echo signal of the second cardiac time phase. A differential image is acquired by calculating a difference between the first image and the second image.Type: GrantFiled: August 31, 2016Date of Patent: April 16, 2019Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventor: Naoyuki Furudate
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Patent number: 9770187Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a controller and a generator. The controller divides a plurality of slice regions that are sequentially arranged into a first group including two non-sequential slice regions and a second group including a slice region positioned between the two non-sequential slice regions and acquires data from the slice regions for each of the groups. When acquiring data from at least one of the two non-sequential slice regions, the controller acquires the data after applying a pre-sat pulse to a position between the two non-sequential slice regions. When acquiring data from the slice region positioned between the two non-sequential slice regions, the controller acquires the data after applying a pre-sat pulse to a position of at least one of the two non-sequential slice regions.Type: GrantFiled: September 22, 2015Date of Patent: September 26, 2017Assignee: Toshiba Medical Systems CorporationInventors: Masaaki Umeda, Satoshi Sugiura, Naoyuki Furudate, Hiroshi Kusahara, Masaaki Nagashima
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Publication number: 20170176555Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a gradient magnetic field power supply, a voltmeter, and processing circuitry. The gradient magnetic field power supply includes an amplifier amplifying an input signal based on information of a gradient magnetic field waveform and outputting the amplified input signal to a gradient coil, a power supply device supplying power to the amplifier, and a capacitor bank supplying power, together with the power supply device, to the amplifier. The voltmeter measures a voltage of the capacitor bank. The processing circuitry calculates frequency characteristics of an impedance of the gradient coil, based on a voltage variation of the capacitor bank which was measured by the voltmeter, and controls imaging in accordance with the calculated frequency characteristics.Type: ApplicationFiled: December 13, 2016Publication date: June 22, 2017Applicant: Toshiba Medical Systems CorporationInventors: Sho Kawajiri, Motohiro Miura, Naoyuki Furudate, Yutaka Machii
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Publication number: 20170153307Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a gradient coil, power supply circuitry, and control circuitry. The gradient coil generates a gradient magnetic field. The power supply circuitry supply power to the gradient coil, the power being required by the gradient. The control circuitry temporarily change an upper limit value of power to be supplied by the power supply circuitry to a second value higher than a first value as a rated value based on the power required by the gradient coil.Type: ApplicationFiled: November 23, 2016Publication date: June 1, 2017Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Sho KAWAJIRI, Naoyuki FURUDATE, Yutaka MACHll
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Publication number: 20170049355Abstract: An MRI prep scan acquires plural sets of echo signals at a plurality of cardiac time phases which are mutually different from each other for each slice and used to generate a plurality of respectively corresponding prep images. Reference information is acquired and displayed for determining a first cardiac time phase and a second cardiac time phase on the basis of the prep images. The first and second cardiac time phases are set in response to an operator's specification. An imaging scan section for acquiring imaging echo signals by performing an imaging scan is performed upon each of the first and second cardiac time phases to acquire imaging echo signals. A first image is generated based on an echo signal of the first cardiac time phase and a second image is generated based on an echo signal of the second cardiac time phase. A differential image is acquired by calculating a difference between the first image and the second image.Type: ApplicationFiled: August 31, 2016Publication date: February 23, 2017Inventor: Naoyuki FURUDATE
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Publication number: 20170045595Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processing circuit and a sequence control circuit. The processing circuit calculates, based on an imaging sequence to be executed in magnetic resonance imaging, a value of a current flowing through a closed circuit by using an equivalent circuit and determines, prior to an execution of the imaging sequence, based on the value of the current, whether it is acceptable to execute the imaging sequence. The sequence control circuit executes the imaging sequence. The equivalent circuit is an equivalent circuit for a circuit that includes a gradient coil and that has a first circuit and a second circuit. The first circuit is connected to a power supply and has self-inductance. The second circuit includes at least one closed circuit having mutual inductance with the first circuit.Type: ApplicationFiled: July 28, 2016Publication date: February 16, 2017Applicant: Toshiba Medical Systems CorporationInventors: Yutaka MACHII, Naoyuki Furudate, Sho Kawajiri, Motohiro Miura
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Publication number: 20170045590Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a temperature sensor and a processing circuit. The temperature sensor acquires a temperature. The processing circuit calculates, based on information on an imaging sequence in which magnetic resonance imaging is to be performed, an estimated value of consumption energy of a gradient coil in a case when the imaging sequence is executed and calculates, based on the temperature acquired by the temperature sensor and the estimated value of the consumption energy, an estimated value of a temperature of the gradient coil, the temperature of the gradient coil undergoing changes as the imaging sequence is executed.Type: ApplicationFiled: July 29, 2016Publication date: February 16, 2017Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Yuki TAKAI, Naoyuki FURUDATE, Masaaki NAGASHIMA, Yutaka MACHll
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Patent number: 9462961Abstract: An MRI prep scan acquires plural sets of echo signals at a plurality of cardiac time phases which are mutually different from each other for each slice and used to generate a plurality of respectively corresponding prep images. Reference information is acquired and displayed for determining a first cardiac time phase and a second cardiac time phase on the basis of the prep images. The first and second cardiac time phases are set in response to an operator's specification. An imaging scan section for acquiring imaging echo signals by performing an imaging scan is performed upon each of the first and second cardiac time phases to acquire imaging echo signals. A first image is generated based on an echo signal of the first cardiac time phase and a second image is generated based on an echo signal of the second cardiac time phase. A differential image is acquired by calculating a difference between the first image and the second image.Type: GrantFiled: June 18, 2007Date of Patent: October 11, 2016Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventor: Naoyuki Furudate
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Publication number: 20160093047Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a controller and a generator. The controller divides a plurality of slice regions that are sequentially arranged into a first group including two non-sequential slice regions and a second group including a slice region positioned between the two non-sequential slice regions and acquires data from the slice regions for each of the groups. When acquiring data from at least one of the two non-sequential slice regions, the controller acquires the data after applying a pre-sat pulse to a position between the two non-sequential slice regions. When acquiring data from the slice region positioned between the two non-sequential slice regions, the controller acquires the data after applying a pre-sat pulse to a position of at least one of the two non-sequential slice regions.Type: ApplicationFiled: September 22, 2015Publication date: March 31, 2016Applicants: Kabushiki Kaisha Toshiba, Toshiba Medical Systems CorporationInventors: Masaaki UMEDA, Satoshi SUGIURA, Naoyuki FURUDATE, Hiroshi KUSAHARA, Masaaki NAGASHIMA
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Patent number: 9250306Abstract: A magnetic resonance imaging system is provided for obtaining MR images by scanning a region of the object previously located on an object's positioning image. The system comprises a displaying unit, inputting unit, approximating unit, and locating unit. The displaying unit displays a plurality of tomographic images of the object as the positioning image, each of the tomographic images including an indication of a target of interest thereon. The inputting unit enables information about a running state of the target in a direction along the target to be supplied toward each of the tomographic images. The approximating unit calculates three-dimensionally an approximated curve indicating the running state of the target in the direction on the basis of the supplied information about the running state. The locating unit locates the region substantially perpendicular to the approximated curve.Type: GrantFiled: May 5, 2011Date of Patent: February 2, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Isao Tatebayashi, Naoyuki Takabayashi, Naoyuki Furudate
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Patent number: 9217785Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes an imaging condition setting unit and an imaging unit. The imaging condition setting unit is configured to display a setting screen of a radio frequency prepulse on a display unit to set imaging conditions including application timings of radio frequency prepulses according to input information from an input device through the setting screen. The setting screen displays an application timing of a radio frequency excitation pulse and the application timings of the radio frequency prepulses on a time axis. The imaging unit is configured to perform imaging of an object according to the imaging condition.Type: GrantFiled: December 14, 2012Date of Patent: December 22, 2015Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATIONInventor: Naoyuki Furudate
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Patent number: 9110144Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes an imaging condition setting unit, a verification image generating unit and an imaging unit. The imaging condition setting unit is configured to set an imaging condition for applying radio frequency pre-pulses to adjust a contrast. The radio frequency pre-pulses includes a region selective radio frequency pulse. The verification image generating unit is configured to generate and display an image for verifying the contrast based on application conditions including an application region and an application number of the radio frequency pre-pulses. The imaging unit is configured to perform magnetic resonance imaging according to the imaging condition.Type: GrantFiled: April 3, 2012Date of Patent: August 18, 2015Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATIONInventor: Naoyuki Furudate