Patents Assigned to Oy Ajat LTD
  • Publication number: 20220018978
    Abstract: Some embodiments include an imaging system comprising a detector substrate, at least one detector circuit comprising a capacitor coupled with the detector substrate, the capacitor arranged to collect an electrical charge from the detector substrate, and the imaging system further comprises at least one programmable current source, arranged to provide a neutralizing charge to the capacitor, and the imaging system is configured to select a value for the neutralizing charge in dependence of a frame number.
    Type: Application
    Filed: November 28, 2019
    Publication date: January 20, 2022
    Applicant: OY AJAT LTD.
    Inventors: Tuomas Pantsar, Jouni Pyyhtiä, Dimitrios Chatzistratis, Gerasimos Theodoratos, Yannis Glikiotis, Teemu Pitkänen
  • Patent number: 9772410
    Abstract: A high pixel density intraoral x-ray imaging sensor includes a direct conversion, fully depleted silicon detector bump bonded to a readout CMOS substrate by cu-pillar bump bonds.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: September 26, 2017
    Assignee: OY AJAT LTD.
    Inventors: Konstantinos Spartiotis, Henri Tapio Nykanen, Limin Lin, Tuomas Heikki Elmeri Lahtinen, Pasi Juhani Laukka
  • Patent number: 9332950
    Abstract: A radiation imaging device includes plural individual detectors defining an irregular rectangular active area responsive to x-rays and with different widths along a length of the active area. The individual detectors may be of different rectangular shapes and mounted on a motherboard. The motherboard may be formed of a first module mounting a first of two individual detectors and a second module detachable connected to the first module and mounting a second of two individual detectors.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: May 10, 2016
    Assignee: OY AJAT LTD.
    Inventors: Konstantinos Spartiotis, Tom Schulman, Tuomas Pantsar
  • Patent number: 9329284
    Abstract: A high pixel density intraoral x-ray imaging sensor includes a direct conversion, fully depleted silicon detector bump bonded to a readout CMOS substrate by cu-pillar bump bonds.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: May 3, 2016
    Assignee: OY AJAT LTD.
    Inventors: Konstantinos Spartiotis, Henri Tapio Nykanen, Limin Lin, Tuomas Heikki Elmeri Lahtinen, Pasi Juhani Laukka
  • Patent number: 9310495
    Abstract: An photon (energy) identifying radiation imaging device, for imaging x-ray, gamma ray and charged radiation in medical, dental and industrial applications. The imaging device includes a detector substrate and a readout substrate. The detector substrate has a plurality of detector pixels and the readout substrate has a plurality of corresponding pixel readout circuits. Each pixel readout circuit has circuitry for processing an input analog signal and also has one or more buffers for temporarily storing values corresponding to the signal of at least two individual incoming radiation events. The readout substrate includes a digital controller having digital processing units for carrying out off-pixel digital signal processing and data/rate reduction prior to readout.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: April 12, 2016
    Assignee: OY AJAT LTD.
    Inventors: Konstantinos Spartiotis, Tuomas Pantsar, Charalampos Lampropoulos, Theofanis Orfanoudakis
  • Patent number: 9050039
    Abstract: A radiation imaging device includes plural individual detectors defining an irregular rectangular active area responsive to x-rays and with different widths along a length of the active area. The individual detectors may be of different rectangular shapes and mounted on a motherboard. The motherboard may be formed of a first module mounting a first of two individual detectors and a second module detachable connected to the first module and mounting a second of two individual detectors.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: June 9, 2015
    Assignee: OY AJAT LTD.
    Inventors: Konstantinos Spartiotis, Tom Schulman, Tuomas Pantsar
  • Patent number: 8850697
    Abstract: An automatic or semiautomatic method of assembly of radiation digital imaging tiles to form a one or two dimensional imaging panel whereby the imaging tiles are provided with alignment mark(s), inherent or specific, and a mother board or substrate is also provide with alignment mark(s) and the imaging tiles are mounted on the mother board by means of mechanical pick and place mechanism, whereby the distances of corresponding alignment mark are set to predetermined values, programmed in the automatic machine.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: October 7, 2014
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Pasi Laukka
  • Patent number: 8693624
    Abstract: An extra-oral digital panoramic dental x-ray imaging system for multi-layer panoramic and transverse X-ray imaging providing with an X-ray source and a digital imaging device providing real time frame mode output and autofocusing. The X-ray source and imaging device are mounted in a mechanical manipulator defining the trajectory of a predetermined image layer. The imaging device communicates with a processor that generates a frames memory from which an image reconstruction mechanism composes the final images.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: April 8, 2014
    Assignee: Oy AJAT Ltd.
    Inventors: Konstantinos Spartiotis, Tuomas Pantsar
  • Publication number: 20130329854
    Abstract: An extra-oral digital panoramic dental x-ray imaging system for multi-layer panoramic and transverse X-ray imaging providing with an X-ray source and a digital imaging device providing real time frame mode output and autofocusing. The X-ray source and imaging device are mounted in a mechanical manipulator defining the trajectory of a predetermined image layer. The imaging device communicates with a processor that generates a frames memory from which an image reconstruction mechanism composes the final images.
    Type: Application
    Filed: August 12, 2013
    Publication date: December 12, 2013
    Applicant: OY AJAT, LTD.
    Inventors: KONSTANTINOS SPARTIOTIS, TUOMAS PANTSAR
  • Patent number: 8530850
    Abstract: A calibrated real-time, high energy X-ray imaging system is disclosed which incorporates a direct radiation conversion, X-ray imaging camera and a high speed image processing module. The high energy imaging camera utilizes a Cd—Te or a Cd—Zn—Te direct conversion detector substrate. The image processor includes a software driven calibration module that uses an algorithm to analyze time dependent raw digital pixel data to provide a time related series of correction factors for each pixel in an image frame. Additionally, the image processor includes a high speed image frame processing module capable of generating image frames at frame readout rates of greater than ten frames per second to over 100 frames per second. The image processor can provide normalized image frames in real-time or can accumulate static frame data for substantially very long periods of time without the typical concomitant degradation of the signal-to-noise ratio.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: September 10, 2013
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Tuomas Pantsar
  • Patent number: 8532254
    Abstract: An extra-oral digital panoramic dental x-ray imaging system for multi-layer panoramic and transverse X-ray imaging providing with an X-ray source and a digital imaging device providing real time frame mode output and autofocusing. The X-ray source and imaging device are mounted in a mechanical manipulator defining the trajectory of a predetermined image layer. The imaging device communicates with a processor that generates a frames memory from which an image reconstruction mechanism composes the final images.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: September 10, 2013
    Assignee: Oy AJAT Ltd
    Inventors: Tuomas Pantsar, Konstantinos Spartiotis
  • Publication number: 20130003921
    Abstract: A radiation imaging device includes plural individual detectors defining an irregular rectangular active area responsive to x-rays and with different widths along a length of the active area. The individual detectors may be of different rectangular shapes and mounted on a motherboard. The motherboard may be formed of a first module mounting a first of two individual detectors and a second module detachable connected to the first module and mounting a second of two individual detectors.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: OY AJAT LTD.
    Inventors: KONSTANTINOS SPARTIOTIS, TOM SCHULMAN, TUOMAS PANTSAR
  • Publication number: 20120280131
    Abstract: An photon (energy) identifying radiation imaging device, for imaging x-ray, gamma ray and charged radiation in medical, dental and industrial applications. The imaging device includes a detector substrate and a readout substrate. The detector substrate has a plurality of detector pixels and the readout substrate has a plurality of corresponding pixel readout circuits. Each pixel readout circuit has circuitry for processing an input analog signal and also has one or more buffers for temporarily storing values corresponding to the signal of at least two individual incoming radiation events. The readout substrate includes a digital controller having digital processing units for carrying out off-pixel digital signal processing and data/rate reduction prior to readout.
    Type: Application
    Filed: January 3, 2012
    Publication date: November 8, 2012
    Applicant: OY AJAT LTD.
    Inventors: Konstantinos SPARTIOTIS, Tuomas PANTSAR, Charalampos LAMBROPOULOS, Theofanis ORPHANOUDAKIS
  • Patent number: 8306181
    Abstract: A multi-functional dental extra-oral x-ray imaging system includes a conventional x-ray source and manipulator to control the movement of the x-ray source by translating and rotating, a real time multiple frame producing x-ray imaging device and at least two different exposure profile programs, whereas one of such profiles produces a standard panoramic image and a second of such profiles produces an angled or transverse slice to a the panoramic image. A third exposure profile program produces a substantially linear projection of the human skull by combining two linear projections, one for the right and one for the left part of the head. The sensor is a linear direct conversion operating preferably in the frame mode and producing more than 100 fps.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: November 6, 2012
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Tuomas Pantsar, Henrik Viking Lohman
  • Patent number: 8295432
    Abstract: A radiation imaging device includes plural individual detectors defining an irregular rectangular active area responsive to x-rays and with different widths along a length of the active area. The individual detectors may be of different rectangular shapes and mounted on a motherboard. The motherboard may be formed of a first module mounting a first of two individual detectors and a second module detachable connected to the first module and mounting a second of two individual detectors.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: October 23, 2012
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Tom Schulman, Tuomas Pantsar
  • Publication number: 20120090171
    Abstract: An automatic or semiautomatic method of assembly of radiation digital imaging tiles to form a one or two dimensional imaging panel whereby the imaging tiles are provided with alignment mark(s), inherent or specific, and a mother board or substrate is also provide with alignment mark(s) and the imaging tiles are mounted on the mother board by means of mechanical pick and place mechanism, whereby the distances of corresponding alignment mark are set to predetermined values, programmed in the automatic machine.
    Type: Application
    Filed: December 23, 2011
    Publication date: April 19, 2012
    Applicant: OY AJAT, LTD
    Inventors: Konstantinos SPARTIOTIS, Pasi LAUKKA
  • Patent number: 8117741
    Abstract: An automatic or semiautomatic method of assembly of radiation digital imaging tiles to form a one or two dimensional imaging panel whereby the imaging tiles are provided with alignment mark(s), inherent or specific, and a mother board or substrate is also provide with alignment mark(s) and the imaging tiles are mounted on the mother board by means of mechanical pick and place mechanism, whereby the distances of corresponding alignment mark are set to predetermined values, programmed in the automatic machine.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: February 21, 2012
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Pasi Laukka
  • Patent number: 7916833
    Abstract: An extra-oral digital panoramic dental x-ray imaging system for multi-layer panoramic and transverse X-ray imaging provided with an X-ray source and a digital imaging device providing real time frame mode output and autofocusing. The X-ray source and imaging device are mounted in a mechanical manipulator defining the trajectory of a predetermined image layer. The imaging device communicates with a processor that generates a frames memory from which an image reconstruction mechanism composes the final images.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: March 29, 2011
    Assignee: Oy Ajat Ltd.
    Inventors: Tuomas Pantsar, Konstantinos Spartiotis
  • Publication number: 20100246761
    Abstract: An extra-oral digital panoramic dental x-ray imaging system for multi-layer panoramic and transverse X-ray imaging providing with an X-ray source and a digital imaging device providing real time frame mode output and autofocusing. The X-ray source and imaging device are mounted in a mechanical manipulator defining the trajectory of a predetermined image layer. The imaging device communicates with a processor that generates a frames memory from which an image reconstruction mechanism composes the final images.
    Type: Application
    Filed: April 28, 2010
    Publication date: September 30, 2010
    Applicant: OY AJAT, LTD.
    Inventors: TUOMAS PANTSAR, KONSTANTINOS SPARTIOTIS
  • Publication number: 20100208866
    Abstract: A radiation imaging device includes plural individual detectors defining an irregular rectangular active area responsive to x-rays and with different widths along a length of the active area. The individual detectors may be of different rectangular shapes and mounted on a motherboard. The motherboard may be formed of a first module mounting a first of two individual detectors and a second module detachable connected to the first module and mounting a second of two individual detectors.
    Type: Application
    Filed: May 3, 2010
    Publication date: August 19, 2010
    Applicant: OY AJAT LTD.
    Inventors: Konstantinos Spartiotis, Tom Schulman, Tuomas Pantsar