GB1437282A - Electromechanical control systems - Google Patents

Electromechanical control systems

Info

Publication number
GB1437282A
GB1437282A GB1794974A GB1794974A GB1437282A GB 1437282 A GB1437282 A GB 1437282A GB 1794974 A GB1794974 A GB 1794974A GB 1794974 A GB1794974 A GB 1794974A GB 1437282 A GB1437282 A GB 1437282A
Authority
GB
United Kingdom
Prior art keywords
gate
state
aperture
circuit
comparator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1794974A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Machlett Laboratories Inc
Original Assignee
Machlett Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Machlett Laboratories Inc filed Critical Machlett Laboratories Inc
Publication of GB1437282A publication Critical patent/GB1437282A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/06—Diaphragms
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/20—Control of position or direction using feedback using a digital comparing device
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/54—Control of apparatus or devices for radiation diagnosis
    • A61B6/548—Remote control of the apparatus or devices

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • X-Ray Techniques (AREA)
  • Radiography Using Non-Light Waves (AREA)
  • Radiation-Therapy Devices (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

1437282 Automatic control MACHLETT LABORATORIES Inc 24 April 1974 [26 April 1973] 17949/74 Heading G3N An electro-mechanical control system, in response to a logic comparison, causes the arrest of a drive means on a change from a first state to a second state and for a change from the second state to the first state to allow the drive means to continue to drive a driven member for an interval in the direction corresponding to the second state and then to reverse. As shown, a control system for use with a radiographic apparatus see Specification 1437283 in Divisions G2-G3 and H3-H5, a collimator monitoring unit comprises a detector monitoring circuit 144 which is responsive to selection of a signal-to-image distance, detected by means 100, 122, 124, and to the presence of an image receptor detected by a means 62, to develop a gating signal on a line 166 and a pulse on a line 168, The actual selected image-to-receptor distance, as sensed by a potentiometric means 116, is used as a ratiomultiplier for the radiation aperture, as sensed by a potentiometric means 130. The output of means 130 is compared with the actual image size, as sensed by a potentiometric means 72, at the input to a comparator 18. The difference signal from comparator 180 is fed to a latched flip-flop gate 180, and a gate 204. The gate 188 enabled by the outputs of circuit 144, responds to a comparator output, indicative of a required increase in aperture, to activate a motor drive circuit 200; a one-shot multi-vibrator 196 providing overshoot whereby the comparator output changes to indicate an aperture decrease which is effected through a gate 204 by a motor drive circuit 208. The arrangement operates to maintain the area irradiated at a minimum. Closure of the aperture in response to a comparator output is directly effected through the gate 204. A circuit 148 provides interlock and indication.
GB1794974A 1973-04-26 1974-04-24 Electromechanical control systems Expired GB1437282A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US354826A US3863073A (en) 1973-04-26 1973-04-26 Automatic system for precise collimation of radiation

Publications (1)

Publication Number Publication Date
GB1437282A true GB1437282A (en) 1976-05-26

Family

ID=23395056

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4502975A Expired GB1437283A (en) 1973-04-26 1974-04-24 Radiographic apparatus
GB1794974A Expired GB1437282A (en) 1973-04-26 1974-04-24 Electromechanical control systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB4502975A Expired GB1437283A (en) 1973-04-26 1974-04-24 Radiographic apparatus

Country Status (5)

Country Link
US (1) US3863073A (en)
JP (1) JPS5440197B2 (en)
CA (1) CA1033854A (en)
DE (1) DE2420364B2 (en)
GB (2) GB1437283A (en)

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US4018716A (en) * 1975-06-16 1977-04-19 The Machlett Laboratories, Incorporated Radiographic system
DE2759073C3 (en) * 1977-12-30 1981-10-22 Siemens AG, 1000 Berlin und 8000 München Electron tube
US4443888A (en) * 1982-03-29 1984-04-17 Litton Industrial Products, Inc. SID Monitor
US4416022A (en) * 1982-03-29 1983-11-15 Litton Industrial Products, Inc. Prism light-line system
GB2127173A (en) * 1982-09-13 1984-04-04 Varian Associates Thin fieldlight mirror for medical electron accelerators
JPH02238448A (en) * 1989-03-13 1990-09-20 Konica Corp Radiographic device
US7609806B2 (en) * 2004-10-18 2009-10-27 Hologic Inc. Mammography system and method employing offset compression paddles, automatic collimations, and retractable anti-scatter grid
WO2003037046A2 (en) 2001-10-19 2003-05-01 Hologic, Inc. Mammography system and method employing offset compression paddles, automatic collimation, and retractable anti-scatter grid
US7616801B2 (en) 2002-11-27 2009-11-10 Hologic, Inc. Image handling and display in x-ray mammography and tomosynthesis
US7123684B2 (en) * 2002-11-27 2006-10-17 Hologic, Inc. Full field mammography with tissue exposure control, tomosynthesis, and dynamic field of view processing
US8571289B2 (en) 2002-11-27 2013-10-29 Hologic, Inc. System and method for generating a 2D image from a tomosynthesis data set
US10638994B2 (en) 2002-11-27 2020-05-05 Hologic, Inc. X-ray mammography with tomosynthesis
US7577282B2 (en) 2002-11-27 2009-08-18 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US8565372B2 (en) 2003-11-26 2013-10-22 Hologic, Inc System and method for low dose tomosynthesis
US7662082B2 (en) 2004-11-05 2010-02-16 Theragenics Corporation Expandable brachytherapy device
EP1815388B1 (en) * 2004-11-15 2013-03-06 Hologic, Inc. Matching geometry generation and display of mammograms and tomosynthesis images
EP1816965B1 (en) 2004-11-26 2016-06-29 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis x-ray system
DE102005002559B4 (en) * 2005-01-19 2007-06-21 Siemens Ag X-ray device with error protection circuit
US7242749B2 (en) * 2005-11-15 2007-07-10 General Electric Company Methods and systems for dynamic pitch helical scanning
US8079946B2 (en) 2005-11-18 2011-12-20 Senorx, Inc. Asymmetrical irradiation of a body cavity
JP5554927B2 (en) 2006-02-15 2014-07-23 ホロジック， インコーポレイテッド Breast biopsy and needle localization using tomosynthesis system
US7630533B2 (en) 2007-09-20 2009-12-08 Hologic, Inc. Breast tomosynthesis with display of highlighted suspected calcifications
US7792245B2 (en) * 2008-06-24 2010-09-07 Hologic, Inc. Breast tomosynthesis system with shifting face shield
US7991106B2 (en) 2008-08-29 2011-08-02 Hologic, Inc. Multi-mode tomosynthesis/mammography gain calibration and image correction using gain map information from selected projection angles
US9248311B2 (en) 2009-02-11 2016-02-02 Hologic, Inc. System and method for modifying a flexibility of a brachythereapy catheter
US9579524B2 (en) 2009-02-11 2017-02-28 Hologic, Inc. Flexible multi-lumen brachytherapy device
US10207126B2 (en) 2009-05-11 2019-02-19 Cytyc Corporation Lumen visualization and identification system for multi-lumen balloon catheter
WO2011043838A1 (en) 2009-10-08 2011-04-14 Hologic, Inc . Needle breast biopsy system and method of use
US9352172B2 (en) 2010-09-30 2016-05-31 Hologic, Inc. Using a guide member to facilitate brachytherapy device swap
US8787522B2 (en) 2010-10-05 2014-07-22 Hologic, Inc Upright x-ray breast imaging with a CT mode, multiple tomosynthesis modes, and a mammography mode
US20120133600A1 (en) 2010-11-26 2012-05-31 Hologic, Inc. User interface for medical image review workstation
US10342992B2 (en) 2011-01-06 2019-07-09 Hologic, Inc. Orienting a brachytherapy applicator
CN110353709A (en) 2011-03-08 2019-10-22 霍洛吉克公司 The system and method for dual intensity and/or radiography enhancing breast imaging
JP2014534042A (en) 2011-11-27 2014-12-18 ホロジック, インコーポレイテッドHologic, Inc. System and method for generating 2D images using mammography and / or tomosynthesis image data
EP2814396B1 (en) 2012-02-13 2017-06-21 Hologic Inc. System and method for navigating a tomosynthesis stack using synthesized image data
EP3366217B1 (en) 2013-03-15 2019-12-25 Hologic, Inc. Tomosynthesis-guided biopsy in prone
CA2925907C (en) 2013-10-09 2022-03-15 Hologic, Inc. X-ray breast tomosynthesis enhancing spatial resolution including in the thickness direction of a flattened breast
JP6506769B2 (en) 2014-02-28 2019-04-24 ホロジック, インコーポレイテッドHologic, Inc. System and method for generating and displaying tomosynthesis image slabs
JP7085492B2 (en) 2016-04-22 2022-06-16 ホロジック，インコーポレイテッド Tomosynthesis with a shift focus X-ray system using an addressable array
CN106873302B (en) * 2016-12-30 2018-09-11 成都信息工程大学 A kind of method of detector longitudinal direction automatic tracing bulb focus radial imaging
CN106773513B (en) * 2016-12-30 2018-07-20 成都信息工程大学 The method of the ray automatic tracing imaging of digital radiography
US11455754B2 (en) 2017-03-30 2022-09-27 Hologic, Inc. System and method for synthesizing low-dimensional image data from high-dimensional image data using an object grid enhancement
CN110662489A (en) 2017-03-30 2020-01-07 豪洛捷公司 System and method for targeted object enhancement to generate synthetic breast tissue images
WO2018183548A1 (en) 2017-03-30 2018-10-04 Hologic, Inc. System and method for hierarchical multi-level feature image synthesis and representation
EP3641635A4 (en) 2017-06-20 2021-04-07 Hologic, Inc. Dynamic self-learning medical image method and system
EP4129188A1 (en) 2017-08-16 2023-02-08 Hologic, Inc. Techniques for breast imaging patient motion artifact compensation
EP3449835B1 (en) 2017-08-22 2023-01-11 Hologic, Inc. Computed tomography system and method for imaging multiple anatomical targets
US11090017B2 (en) 2018-09-13 2021-08-17 Hologic, Inc. Generating synthesized projection images for 3D breast tomosynthesis or multi-mode x-ray breast imaging
EP3832689A3 (en) 2019-12-05 2021-08-11 Hologic, Inc. Systems and methods for improved x-ray tube life
US11471118B2 (en) 2020-03-27 2022-10-18 Hologic, Inc. System and method for tracking x-ray tube focal spot position
US11786191B2 (en) 2021-05-17 2023-10-17 Hologic, Inc. Contrast-enhanced tomosynthesis with a copper filter

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Publication number Priority date Publication date Assignee Title
US3206604A (en) * 1962-11-13 1965-09-14 Gen Electric Adjustable x-ray field defining cone and field size indicating means
US3502878A (en) * 1967-09-22 1970-03-24 Us Health Education & Welfare Automatic x-ray apparatus for limiting the field size of a projected x-ray beam in response to film size and to source-to-film distance
US3581094A (en) * 1968-11-07 1971-05-25 Machlett Lab Inc X-ray apparatus
US3643095A (en) * 1969-11-28 1972-02-15 Picker Corp Automatic collimator control for x-ray apparatus

Also Published As

Publication number Publication date
JPS5019384A (en) 1975-02-28
US3863073A (en) 1975-01-28
GB1437283A (en) 1976-05-26
DE2420364B2 (en) 1980-09-11
CA1033854A (en) 1978-06-27
DE2420364A1 (en) 1974-11-07
JPS5440197B2 (en) 1979-12-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930424