Patents by Inventor Kazuhiro Hirota

Kazuhiro Hirota 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).

  • Publication number: 20140005556
    Abstract: A probe includes an acoustic wave transmitting section that transmits acoustic waves toward a subject, a light irradiating section that irradiates a light beam guided from a light source, and an acoustic wave detecting section that detects photoacoustic waves generated within the subject due to irradiation of the light beam onto the subject and reflected acoustic waves of the acoustic waves transmitted into the subject. In addition, a mode switching switch is provided on the probe. A control means switches operating modes between an operating mode in which the acoustic wave detecting section detects at least photoacoustic waves, and an operating mode in which the acoustic wave detecting section does not detect photoacoustic waves.
    Type: Application
    Filed: September 4, 2013
    Publication date: January 2, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Kazuhiro HIROTA, Kazuhiro TSUJITA, Kaku IRISAWA
  • Publication number: 20130338478
    Abstract: A probe transmits acoustic waves toward a subject. After transmission of the acoustic waves, the probe receives reflected acoustic waves of the transmitted acoustic waves. Whether the probe is in contact with a subject is judged based on the received reflected acoustic waves. The probe irradiates light toward the subject when it is judged that the probe is in contact with the subject. After the light is irradiated, acoustic waves generated within the subject due to the light being irradiated are received. A photoacoustic image is generated based on the received acoustic waves generated due to the light being irradiated.
    Type: Application
    Filed: August 21, 2013
    Publication date: December 19, 2013
    Applicant: FUJIFILM CORPORATION
    Inventors: Kazuhiro HIROTA, Kazuhiro TSUJITA
  • Publication number: 20130182261
    Abstract: An optical tomographic imaging method according to one aspect of the present invention is a method of: splitting light emitted from a wavelength sweep light source into measuring light and reference light; radiating the measuring light onto a measuring subject; combining reflection light from the measuring subject with the reference light; detecting interfered light obtained by combining the reflection light with the reference light as an interference signal; and Fourier-transforming the interference signal to acquire a tomographic image of the measuring subject, and includes steps of: generating tomographic data of the measuring subject based on the interference signal; generating surface data of the measuring subject based on the interference signal; constructing a tomographic image that is based on the generated tomographic data; constructing a surface image that is based on the outputted surface data; and generating a display image from the tomographic image and the surface image.
    Type: Application
    Filed: July 27, 2011
    Publication date: July 18, 2013
    Applicant: FUJIFILM CORPORATION
    Inventor: Kazuhiro Hirota
  • Patent number: 8406857
    Abstract: RF signals in predetermined time regions are extracted respectively from a plurality of RF signals which are produced when an examinee is scanned by an ultrasonic wave, and respective IB values are calculated in the time regions. A variance value of the calculated IB values is calculated, and information based on the calculated variance value is output.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: March 26, 2013
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Taro Tsunoda, Kazuhiro Hirota
  • Patent number: 8379945
    Abstract: An optical apparatus for acquiring structure information comprises an optical branching device which splits a light outputted from a wavelength-swept light source into a sampling light and a reference light; a scanning device which scans a subject having a layer structure with the sampling light; and an signal processing device which acquires optical structure information of the subject by processing an interference signal between a return light which is reflected or backscattered at the subject and the reference light which has propagated a predetermined optical path length; wherein the signal processing device includes: a layer information extraction device which extracts layer information of the subject based on the interference signal; a feature value calculation device which calculates a feature value of the layer information; and an enhanced layer-structure image construction device which constructs an enhanced layer-structure image in which the layer structure is enhanced based on the feature value.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: February 19, 2013
    Assignee: Fujifilm Corporation
    Inventor: Kazuhiro Hirota
  • Patent number: 8157741
    Abstract: An image diagnostic system controls a probe to perform rotational and axially-moving scanning within a body cavity and to acquire reflected signals through the probe. Based on the acquired reflected signals, the system forms and outputs tomographic image of the body cavity and biotissue surrounding the body cavity. The system is provided with a detection unit which detects a direction of movement of the probe in the axially-moving scanning and a control unit which controls the rotational speed of the probe in the rotational scanning. The control unit includes a determination unit which determines whether or not the rotational speed of the probe is to be changed upon detection of movement of the probe toward the distal direction within the body cavity, and changes the rotational speed of the probe upon determination of a change at the determination unit.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: April 17, 2012
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Patent number: 8100833
    Abstract: An image diagnostic system controls a probe to perform radial scanning within a body cavity and to acquire reflected signals through the probe. The system produces data based on the signals, constructs and outputs tomographic images of the body cavity and biotissue surrounding the body cavity. The system includes an extraction unit for extracting portions of the produced data on the basis of a frame rate upon successively outputting the tomographic images, and a first output control unit for forming, based on the extracted data, real time tomographic images of the body cavity and biotissue which are outputted in real time during radial scanning. A storage device stores the produced data, and a second output control unit forms, subsequent to the radial scanning, tomographic images of the body cavity and biotissue based on the stored data which are then outputted.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: January 24, 2012
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Patent number: 8029446
    Abstract: An ultrasonic imaging system includes an imaging catheter and an imaging apparatus. The imaging catheter has an insert for being inserted into a blood vessel, a transducer disposed in the insert, and at least one temperature sensor disposed in the insert. The temperature sensor measures the intravascular temperature in a radial direction of the blood vessel and rotates to measure an intravascular temperature distribution in a transverse cross section of the blood vessel.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: October 4, 2011
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Toyokazu Horiike, Hiroyuki Yagami, Kazuhiro Hirota
  • Publication number: 20110112410
    Abstract: An optical probe, comprising: a sheath to be inserted into a body cavity; an optical fiber inside the sheath; an optical component attached to a distal end portion of the optical fiber inside the sheath; wherein a light beam transmitted through the optical fiber is emitted from the optical component toward a body tissue in the body cavity, and wherein the sheath comprises a plurality of balloons spaced at predetermined intervals on a part on the distal end portion side of an outer periphery and capable of inflating/deflating in a radial direction orthogonal to a longitudinal axis, a suction inlet located between the plurality of balloons to draw the body tissue at the part on the distal end portion side of the outer periphery by suction, a balloon inflation port connected to the balloons, and a suction port connected to the suction inlet, and the plurality of balloons are airtightly locked to an body cavity inner wall by supplying a fluid or a gas through the balloon inflation port to pressurize and inflat
    Type: Application
    Filed: November 9, 2010
    Publication date: May 12, 2011
    Inventor: Kazuhiro HIROTA
  • Publication number: 20110077463
    Abstract: According to the optical probe of an aspect of the present invention, the flexible and optically transparent partition wall separates the imaging core lumen and the guidewire lumen, and the pressure increasing/decreasing port increases/decreases the pressure inside the imaging core lumen that is at a proximal part of the imaging core lumen. It is therefore possible to advance the probe along the guidewire as far as an affected area, and by pulling back the guidewire to a handle portion to push out the imaging core to the distal end portion, it is possible to observe a distal part and obtain an image without guidewire artifacts.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 31, 2011
    Applicant: FUJIFILM CORPORATION
    Inventor: Kazuhiro HIROTA
  • Patent number: 7905838
    Abstract: An image diagnostic system controls a probe to perform radial scanning within a body cavity produces data based on signals received by the probe to construct and display a tomographic image of the body cavity and surrounding biotissue. The system includes a generation unit, a selection unit and a conversion unit. The generation unit generates and outputs synchronization signals in synchronization with a timing of acquisition cycles of line units of the signals and generated at a higher frequency than output signals outputted corresponding to rotational angles of the probe upon performing the scanning. The selection unit successively receives the output signals, and selects and outputs first ones of the synchronization signals as received subsequent to the receptions of the output signals. Responsive to successive inputs of the synchronization signals selected by the selection unit, the conversion unit converts the reflected signals into digital signals and outputs the digital signals.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: March 15, 2011
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Publication number: 20100268087
    Abstract: Three-dimensional image data is constructed without reducing precision of tomographic image data by each radial scanning which is acquired by scanning in a longitudinal axis direction of a probe even when a variation of rotational speed of radial scanning occurs due to a variation of torque in wave radiation from a probe distal end. A signal processing unit is configured by including an A/D conversion section, a line data generating section, a frame memory section, a memory control section, a data recording control section, an image constructing section, a data recording section, an longitudinal moving amount calculating section and a control section. The frame memory section stores reflection intensity data from the line data generating section by frame unit based on a rotation detection signal Sa, and is configured by including a first memory, a second memory and a third memory which are constituted of three frame memories for storing reflection intensity data of three frames.
    Type: Application
    Filed: April 15, 2010
    Publication date: October 21, 2010
    Applicant: FUJIFILM Corporation
    Inventor: Kazuhiro HIROTA
  • Publication number: 20100166282
    Abstract: An optical apparatus for acquiring structure information comprises an optical branching device which splits a light outputted from a wavelength-swept light source into a sampling light and a reference light; a scanning device which scans a subject having a layer structure with the sampling light; and an signal processing device which acquires optical structure information of the subject by processing an interference signal between a return light which is reflected or backscattered at the subject and the reference light which has propagated a predetermined optical path length; wherein the signal processing device includes: a layer information extraction device which extracts layer information of the subject based on the interference signal; a feature value calculation device which calculates a feature value of the layer information; and an enhanced layer-structure image construction device which constructs an enhanced layer-structure image in which the layer structure is enhanced based on the feature value.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 1, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: KAZUHIRO HIROTA
  • Patent number: 7738941
    Abstract: An image diagnostic system controls a probe to perform radial scanning within a body cavity, to acquire reflected signals through the probe and to produce data based on the signals. The system includes plural storage units for storing the data in line units, respectively, a writing control unit for controlling writing processing in accordance with a transmission/reception timing of the signals, and a reading control unit for controlling reading processing in accordance with rotation angles of the probe. The writing control unit writes data in the storage unit, other than the storage unit being subjected to reading processing, storing the oldest data. The reading control unit reads the data from the storage unit, other than the storage unit being subjected to writing processing, storing the latest data. The tomographic image is constructed based on the data read by the reading control unit.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: June 15, 2010
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Patent number: 7691061
    Abstract: An ultrasonic diagnostic apparatus includes an ultrasonic transducer housed in a catheter for sending an ultrasonic wave to a blood vessel and receiving a reflected signal from the blood vessel, an A/D converter for converting the received reflected signal into a digital signal, a data averaging processor for storing lines or frames of digital data represented by the digital signal and adding the stored lines or frames of the digital data to average the reflected signal, a demodulating/logarithmic converting processor for demodulating the averaged reflected signal, an image constructor for constructing an image in a radial scan B mode from the demodulated signal, and a display unit for displaying the constructed image in the radial scan B mode. The ultrasonic diagnostic apparatus plots a cross-sectional vascular image with a reduced ultrasonic echo reflected from blood cells, the image clearly displaying the boundary between the blood vessel wall and the blood vessel lumen.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: April 6, 2010
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Publication number: 20070244391
    Abstract: An image diagnostic system controls a probe to perform radial scanning within a body cavity produces data based on signals received by the probe to construct and display a tomographic image of the body cavity and surrounding biotissue. The system includes a generation unit, a selection unit and a conversion unit. The generation unit generates and outputs synchronization signals in synchronization with a timing of acquisition cycles of line units of the signals and generated at a higher frequency than output signals outputted corresponding to rotational angles of the probe upon performing the scanning. The selection unit successively receives the output signals, and selects and outputs first ones of the synchronization signals as received subsequent to the receptions of the output signals. Responsive to successive inputs of the synchronization signals selected by the selection unit, the conversion unit converts the reflected signals into digital signals and outputs the digital signals.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 18, 2007
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Kazuhiro Hirota
  • Publication number: 20070232891
    Abstract: An image diagnostic system controls a probe to perform radial scanning within a body cavity, to acquire reflected signals through the probe and to produce data based on the signals. The system includes plural storage units for storing the data in line units, respectively, a writing control unit for controlling writing processing in accordance with a transmission/reception timing of the signals, and a reading control unit for controlling reading processing in accordance with rotation angles of the probe. The writing control unit writes data in the storage unit, other than the storage unit being subjected to reading processing, storing the oldest data. The reading control unit reads the data from the storage unit, other than the storage unit being subjected to writing processing, storing the latest data. The tomographic image is constructed based on the data read by the reading control unit.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 4, 2007
    Applicant: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Publication number: 20070232892
    Abstract: An image diagnostic system controls a probe to perform rotational and axially-moving scanning within a body cavity and to acquire reflected signals through the probe. Based on the acquired reflected signals, the system forms and outputs tomographic image of the body cavity and biotissue surrounding the body cavity. The system is provided with a detection unit which detects a direction of movement of the probe in the axially-moving scanning and a control unit which controls the rotational speed of the probe in the rotational scanning. The control unit includes a determination unit which determines whether or not the rotational speed of the probe is to be changed upon detection of movement of the probe toward the distal direction within the body cavity, and changes the rotational speed of the probe upon determination of a change at the determination unit.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 4, 2007
    Applicant: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Publication number: 20070232890
    Abstract: An image diagnostic system controls a probe to perform radial scanning within a body cavity and to acquire reflected signals through the probe. The system produces data based on the signals, constructs and outputs tomographic images of the body cavity and biotissue surrounding the body cavity. The system includes an extraction unit for extracting portions of the produced data on the basis of a frame rate upon successively outputting the tomographic images, and a first output control unit for forming, based on the extracted data, real time tomographic images of the body cavity and biotissue which are outputted in real time during radial scanning. A storage device stores the produced data, and a second output control unit forms, subsequent to the radial scanning, tomographic images of the body cavity and biotissue based on the stored data which are then outputted.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 4, 2007
    Applicant: Terumo Kabushiki Kaisha
    Inventor: Kazuhiro Hirota
  • Patent number: 7261288
    Abstract: A postprocessing apparatus stops and positions an image recording sheet delivered from an image forming apparatus at a predetermined position, punches the sheet with a punching unit, and thereafter folds the sheet with a folding unit.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: August 28, 2007
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hisao Hosoya, Kazuhiro Hirota, Kazuyoshi Omi, Kazuaki Fukuda, Yuji Kanazawa, Hideyo Ohashi, Tomoki Nagaoka, Kohji Yoshie, Hiroto Ito, Hitoshi Tamura, Masato Hattori, Teruhiko Toyoizumi, Norishige Kato