CA2427186A1 - A system for the analysis of 3d kinematic of the knee - Google Patents

A system for the analysis of 3d kinematic of the knee Download PDF

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Publication number
CA2427186A1
CA2427186A1 CA 2427186 CA2427186A CA2427186A1 CA 2427186 A1 CA2427186 A1 CA 2427186A1 CA 2427186 CA2427186 CA 2427186 CA 2427186 A CA2427186 A CA 2427186A CA 2427186 A1 CA2427186 A1 CA 2427186A1
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CA
Canada
Prior art keywords
harness
knee
sensors
medial
attachment means
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.)
Granted
Application number
CA 2427186
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French (fr)
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CA2427186C (en
Inventor
Jacques A. De Guise
L'hocine Yahia
Nicolas Duval
Benoit Godbout
Annick Koller
Marwan Sati
Nicola Hagemeister
Gerald Parent
Ismail El Maach
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.)
Polyvalor SC
Socovar SC
Val Chum LP
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Individual
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Filing date
Publication date
Priority claimed from CA002288233A external-priority patent/CA2288233A1/en
Priority claimed from CA002287771A external-priority patent/CA2287771A1/en
Application filed by Individual filed Critical Individual
Priority to CA 2427186 priority Critical patent/CA2427186C/en
Priority claimed from PCT/CA2000/001294 external-priority patent/WO2001032080A1/en
Publication of CA2427186A1 publication Critical patent/CA2427186A1/en
Application granted granted Critical
Publication of CA2427186C publication Critical patent/CA2427186C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4528—Joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body of the patient
    • A61B5/061—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
    • A61B5/064—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body using markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114—Tracking parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1121—Determining geometric values, e.g. centre of rotation or angular range of movement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1126—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb using a particular sensing technique
    • A61B5/1127—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb using a particular sensing technique using markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6828—Leg
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6831—Straps, bands or harnesses

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Physiology (AREA)
  • Human Computer Interaction (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Rheumatology (AREA)
  • Geometry (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

A harness for attachment about a knee femur and comprised of a rigid and non - flexible frame support two resiliently mounted clamping means and sensors is described for the non-invasive measurement of knee motion and its analysis i n 3-D is described. The clamping means elements are urged under pressure outwardly for application against a skin outer surface at predetermined medi al and lateral sites relative to a femur. A non-resilient adjustable stabilisin g element is connected to the rigid frame and disposed at a predetermined location with respect to the medial clamping element in spaced relationship therewith and adjustable for clamping contact on a skin outer surface and in alignment with the centre of a medial condyle of the femur whereby to stabilise the rigid frame about a knee. An attachment rod is secured to the harness and has straps for securing the rod above the knee.

Claims (52)

1. A harness for attachment about a knee femur of a subject, said harness comprised of a rigid and non-flexible frame supporting two resiliently mounted clamping means, said clamping means being urged under pressure outwardly for application against a skin outer surface at predetermined medial and lateral sites relative to a femur, a non-resilient adjustable stabilising element connected to said rigid frame and disposed at a predetermined location with respect to said medial clamping means in spaced relationship therewith and adjustable for clamping contact on a skin outer surface and in alignment with the centre of a medial condyle of the femur whereby to stabilise said rigid frame about a knee, and an attachment means secured to said harness and having means for securement above the knee.
2. A harness as claimed in claim 1 for use in a non invasive system for the precise and reproducible three-dimensional movement analysis of a knee, said system comprising:
attachment means associated to a knee tibia in a fixed relationship, localising sensors secured to said harness and to said tibial attachment means, said sensors providing position and orientation indications associated with the femur and the tibia, in space, means to generate data corresponding to said position and orientation of said sensors, in time.
3. A harness as claimed in claim 2 further comprising means for treating said data, to calculate knee movement indexes and providing resulting data in storage form for use in the analysis of the kinematics of a knee.
4. A harness as claimed in claim 2 further comprising means for treating said data, to calculate knee posture indexes and providing resulting data in storage form for use in the analysis of the posture of a knee.
5. A harness as claimed in claim 1 wherein clamping means are secured to said rigid frame in fixed relationship.
6. A harness as claimed in claim 1 wherein at least one of said clamping means are secured to said rigid frame in an adjustable relationship.
7. A harness as claimed in claim 1 wherein said two resilient clamping means each comprises a rigid housing in which there is displaceably retained a rigid abutment element which has an outer end configured to fit the shape of the condyle, said rigid abutment element having an inner portion retained by said housing in guided relationship and urged outwardly by resilient means captive in said housing.
8. A harness as claimed in claim 7 wherein said resilient mean is constituted by at least one interchangeable spring.
9. A harness as claimed in claim 7 wherein at least one said housing is secured in sliding fit displacement in a cavity formed in said rigid frame, said displacement permitting to position said housing at a desired position within said cavity.
10. A harness as claimed in claim 9 wherein sliding fit displacement is produced by mean of an adjustment screw.
11. A harness as claimed in claim 1 wherein said clamping means are spaced apart at outer ends thereof a predetermined distance for abutment on opposed sides of a knee in a medio-lateral direction.
12. A harness as claimed in claim 1 wherein the said stabilising element comprises a rod having an abutment pad at an outer end thereof, said pad being positioned for contact on the centre of the medial femoral condyle.
13. A harness as claimed in claim 1 wherein the said stabilising element is adjustably secured to a support frame, said support frame being adjustably connected to said rigid non-flexible frame.
14. A harness as claimed in claim 1 wherein said attachment mean is comprised by a bar connected to said frame, said bar being formed by two bar sections interconnected by a hinge, said bar being positioned for skin surface contact against medial portion of the thigh, said mean for securement being an adjustable strap.
15. A harness as claimed in claim 1 wherein said attachment mean is comprised by a bar connected to said frame, said bar being formed by two bar sections interconnected by a pivot, said bar being positioned for skin surface contact against medial portion of the thigh, said mean for securement being an adjustable strap.
16. A harness as claimed in claim 1 wherein said attachment mean is comprised by a bar connected to said frame, said bar being positioned for skin surface contact against medial portion of the thigh, said mean for securement being an adjustable strap.
17. A harness as claimed in claim 1 wherein said rigid and non-flexible frame is composed of a rigid arch with a medial extremity located on a medial side of the knee and a lateral extremity located on a lateral side of the knee, said clamping means, said stabilising element and said attachment mean being secured to said arch.
18. A harness as claimed in claim 1 wherein said rigid and non-flexible frame is composed of a rigid arch, said arch having one medial extremity located on a medial side of the knee, said medial extremity being secured to a medial rigid frame located on a medial side of the knee, said arch having a lateral extremity located on a lateral side of the knee, said lateral extremity being secured to a lateral rigid frame located on said lateral side of the knee, said harness having one of said clamping mean being secured to said lateral rigid frame; said harness having one of said clamping mean, said stabilising element and said attachment mean being secured to said medial rigid frame.
19. A harness as claimed in claim 1 wherein said rigid and non-flexible frame comprises a medial extremity located on a medial side of the knee and a lateral extremity located on lateral side of the knee, said lateral and medial extremities being related in an adjustable relationship; said clamping means, said stabilising element and said attachment means being secured to said non-flexible frame.
20. A harness as claimed in claim 1 wherein said predetermined medial site for said clamping element is between the vastus medialis and the sartorius tendon.
21. A harness as claimed in claim 1 wherein said predetermined lateral site for said clamping element is between the ilio-tibial band and the biceps femoris tendon.
22. A harness as claimed in claim 2 wherein said tibial attachment means comprises a rod, said rod being connectable on a skin outer surface, said skin outer surface being located on an anterior side of the tibia and below the tibial tuberosity, said rod being secured proximally and distally by adjustable strap means for securement about the lower leg portion below the knee.
23. A harness as claimed in claim 2 wherein said tibial attachment means is composed of a rigid rod approximately 3 cm wide, 25 cm long and 3mm thick.
24. A harness as claimed in claim 2 wherein said localising sensors are electromagnetic tracking devices which locate their three-dimensional position and orientation in respect to an electromagnetic field emitter.
25. A harness as claimed in claim 2 wherein said localising sensors are opto-electronic tracking devices which emit optical signal which are received by a camera, said camera enabled to follow the three-dimensional position of each sensor.
26. A harness as claimed in claim 2 wherein said localising sensors are ultrasonic tracking devices which locate their three-dimensional position and orientation in respect to an ultrasound emitter.
27. A harness as claimed in claim 2 wherein said localising sensors are ultrasonic tracking devices which locate their three-dimensional position and orientation with respect to one another.
28. A method of determining the kinematic of a knee in a non invasive manner comprising the steps of:
(i) providing a harness for attachment about a knee femur of a subject, said harness comprised of a rigid and non-flexible frame supporting two resiliently mounted clamping means, said clamping means being urged under pressure outwardly for application against a skin outer surface at predetermined medial and lateral sites relative to a femur, a non-resilient adjustable stabilising element connected to said rigid frame and disposed at a predetermined location with respect to said medial clamping mean in spaced relationship therewith and adjustable for clamping contact on a skin outer surface and in alignment with the centre of a medial condyle of the femur whereby to stabilise said rigid frame about a knee, and an attachment mean secured to said harness and having means for securement above the knee, (ii) installing said harness about a knee to be analysed, (iii) securing tibial attachment means to the knee tibia in a fixed relationship, (iv) generating data by localising sensors secured to said harness and said tibial attachment means, said data localising said sensors in space and in time, (v) detecting the location of said sensors at specific time intervals to provide location data at said time intervals, (vi) treating and analysing said data, and (vii) generating resulting data for use in the description of a knee to which said harness and tibial attachment means is secured.
29. A method as claimed in claim 28 which further comprises the step of causing movement of said knee.
30. A method as claimed in claim 28 wherein said step (ii) of installing said harness about a knee comprises the steps of:
(i) placing one of said clamping mean between the vastus medialis and the sartorius tendon of said knee, (ii) placing one of said clamping means between the ilio-tibial band and the biceps femoris tendon of said knee, (iii)placing attachment means against the medial side of the thigh, (iv) securing the attachment above said knee by attachment means, (v) verifying that said harness is stable about said knee, even after a few movements of flexion-extension of said knee, (vi) adjusting the position of said stabilising element on a medial side, so that one extremity urges against the skin in alignment with the centre of the condyle when said knee is in extension.
31. A method as claimed in claim 28 wherein the installation of said attachment means on said tibia at said predetermined site comprises the steps of:
(i) adjusting the position of said attachment means so that it urges on the anterior side of said tibia, below the tuberosity of said tibia, and (ii) securing said attachment means below said tuberosity of said tibia.
32. A method as claimed in claim 28 wherein said movement is walking.
33. A method as claimed in claim 28 wherein said movement is walking on a treadmill.
34. A method as claimed in claim 28 wherein said movement is jumping at least one time.
35. A method as claimed in claim 28 wherein said movement is bending said knee at least one time.
36. A method as claimed in claim 28 wherein said movement is stretching said knee at least one time.
37. A method as claimed in claim 28 wherein said movement is guided by a person.
38. A method as claimed in claim 28 wherein said movement is guided by an apparatus.
39. A method as claimed in claim 28 wherein there is provided the step of measuring at predetermined time intervals the three-dimensional positions of a group of at least three sensors fixed on said harness and of a group of at least three sensors fixed on said tibial attachment means, said positions being measured with respect of an external reference; and the further step of calculating the three-dimensional positions and orientations of each said group of sensors with respect to said external reference, said sensors generating data on their three-dimensional positions relatively to said external reference.
40. A method as claimed in claim 28 wherein there is provided the step of measuring at predetermined time intervals the three-dimensional position and orientation of at least one sensor on said harness and at least one sensor on said tibial attachment means, said position and orientation being measured with respect to an external reference, said sensors generating data on their three-dimensional position and orientation relatively to said external reference.
41. A method as claimed in claim 28 wherein there is provided the step of measuring at predetermined time intervals the three-dimensional position and orientation of a group of at least three sensors fixed on said harness with respect to a group of at least three sensors fixed on said tibial attachment means;
and the further step of calculating the three-dimensional position and orientation of said group of sensors fixed on said harness in respect to said group of sensors fixed on said tibial attachment mean, said sensors fixed on said harness generating data on their three-dimensional positions relatively to said group of sensors fixed on said tibial attachment means.
42. A method as claimed in claim 28 wherein there is provided the step of measuring at predetermined time intervals the three-dimensional positions and orientations of a group of at least three sensors fixed on said tibial attachment means with respect to a group of at least three sensors fixed on said harness; and the further step of calculating the three-dimensional position and orientation of said group of sensors fixed on said tibial attachment means with respect to said group of sensors fixed on said harness, said sensors fixed on said tibial attachment means generating data on their three-dimensional position relatively to said group of sensors fixed on said harness.
43. A method as claimed in claim 28 wherein there is further provided the step of measuring at predetermined time intervals the three-dimensional position and orientation of at least one sensor fixed on said tibial attachment means with respect to at least one sensor fixed on said harness, said sensor fixed on said tibial attachment means generating data on its three-dimensional position and orientation with respect to said at least one sensor fixed on said harness.
44. A method as claimed in claim 28 wherein there is provided the step of measuring at predetermined time intervals the three-dimensional position and orientation of at least one sensor fixed on said harness with respect to at least one sensor fixed on said tibial attachment means, said sensor fixed on said harness generating data on its three-dimensional position and orientation with respect to said sensor fixed on said tibial attachment means.
45. A method as claimed in claim 28 wherein said analysis of data is performed by computerised program means.
46. A method as claimed in claim 28 wherein said analysis of data is performed by electronic means.
47. A method as claimed in claim 28 wherein said analysis of data consists of:
(i) defining a coordinate system relatively to said group of sensors fixed to said harness, (ii) defining a coordinate system relatively to said group of sensors fixed on said tibial attachment means, and (iii)calculating the mathematical relationship between said coordinate systems one to another.
48. A method as claimed in claim 47 wherein said coordinate systems are measured by means of computerised three-dimensional representations of said femur and tibia, said representations being calibrated in order to be accurately positioned and orientated relatively to real femur and tibia bones.
49. A method as claimed in claim 47 wherein said mathematical relationship is defined by rotations and translations of said femur and tibia with respect to one another.
50. A method as claimed in claim 47 wherein said mathematical relationship is defined by a finite helicoïdal axis of said knee.
51. A method as claimed in claim 47 wherein said resulting data represent Euler angles and distances described at predetermined time intervals.
52. A method as claimed in claim 47 wherein said resulting data represent three-dimensional orientations and positions of finite helicoidal axis of said knee, angle of rotation around said helicoïdal axis and translation along said helicoidal axis, described at predetermined time intervals.
CA 2427186 1999-11-01 2000-10-31 A system for the analysis of 3d kinematic of the knee Expired - Lifetime CA2427186C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2427186 CA2427186C (en) 1999-11-01 2000-10-31 A system for the analysis of 3d kinematic of the knee

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CA2,288,233 1999-11-01
CA002288233A CA2288233A1 (en) 1999-11-01 1999-11-01 3-d knee analyser
CA002287771A CA2287771A1 (en) 1999-11-01 1999-11-01 Validation of 3-d knee analyser
CA2,287,771 1999-11-01
PCT/CA2000/001294 WO2001032080A1 (en) 1999-11-01 2000-10-31 A system for the analysis of 3d kinematic of the knee
CA 2427186 CA2427186C (en) 1999-11-01 2000-10-31 A system for the analysis of 3d kinematic of the knee

Publications (2)

Publication Number Publication Date
CA2427186A1 true CA2427186A1 (en) 2001-05-10
CA2427186C CA2427186C (en) 2011-08-23

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009067782A1 (en) * 2007-11-26 2009-06-04 ECOLE DE TECHNOLOGIE SUPéRIEURE Harness system for kinematic analysis of the knee
US10426429B2 (en) 2015-10-08 2019-10-01 Decision Sciences Medical Company, LLC Acoustic orthopedic tracking system and methods
US10743838B2 (en) 2015-02-25 2020-08-18 Decision Sciences Medical Company, LLC Acoustic signal transmission couplants and coupling mediums
US10993699B2 (en) 2011-10-28 2021-05-04 Decision Sciences International Corporation Spread spectrum coded waveforms in ultrasound diagnostics
US11096661B2 (en) 2013-09-13 2021-08-24 Decision Sciences International Corporation Coherent spread-spectrum coded waveforms in synthetic aperture image formation
US11154274B2 (en) 2019-04-23 2021-10-26 Decision Sciences Medical Company, LLC Semi-rigid acoustic coupling articles for ultrasound diagnostic and treatment applications
CN115006823A (en) * 2022-06-09 2022-09-06 渤海大学 Dash motion tracking means and control platform that sports training used
US11520043B2 (en) 2020-11-13 2022-12-06 Decision Sciences Medical Company, LLC Systems and methods for synthetic aperture ultrasound imaging of an object
US12017389B2 (en) 2019-03-06 2024-06-25 Decision Sciences Medical Company, LLC Methods for manufacturing and distributing semi-rigid acoustic coupling articles and packaging for ultrasound imaging

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009067782A1 (en) * 2007-11-26 2009-06-04 ECOLE DE TECHNOLOGIE SUPéRIEURE Harness system for kinematic analysis of the knee
US11596388B2 (en) 2011-10-28 2023-03-07 Decision Sciences International Corporation Spread spectrum coded waveforms in ultrasound diagnostics
US10993699B2 (en) 2011-10-28 2021-05-04 Decision Sciences International Corporation Spread spectrum coded waveforms in ultrasound diagnostics
US12533111B2 (en) 2011-10-28 2026-01-27 Decision Sciences International Corporation Spread spectrum coded waveforms in ultrasound diagnostics
US11957516B2 (en) 2011-10-28 2024-04-16 Decision Sciences International Corporation Spread spectrum coded waveforms in ultrasound diagnostics
US11096661B2 (en) 2013-09-13 2021-08-24 Decision Sciences International Corporation Coherent spread-spectrum coded waveforms in synthetic aperture image formation
US12121394B2 (en) 2013-09-13 2024-10-22 Decision Sciences International Corporation Coherent spread-spectrum coded waveforms in synthetic aperture image formation
US11607192B2 (en) 2013-09-13 2023-03-21 Decision Sciences International Corporation Coherent spread-spectrum coded waveforms in synthetic aperture image formation
US10743838B2 (en) 2015-02-25 2020-08-18 Decision Sciences Medical Company, LLC Acoustic signal transmission couplants and coupling mediums
US11191521B2 (en) 2015-02-25 2021-12-07 Decision Sciences Medical Company, LLC Acoustic signal transmission couplants and coupling mediums
US11839512B2 (en) 2015-02-25 2023-12-12 Decision Sciences Medical Company, LLC Acoustic signal transmission couplants and coupling mediums
US12251259B2 (en) 2015-10-08 2025-03-18 Decision Sciences Medical Company, LLC Acoustic orthopedic tracking system and methods
US10426429B2 (en) 2015-10-08 2019-10-01 Decision Sciences Medical Company, LLC Acoustic orthopedic tracking system and methods
US11737726B2 (en) 2015-10-08 2023-08-29 Decision Sciences Medical Company, LLC Acoustic orthopedic tracking system and methods
US12017389B2 (en) 2019-03-06 2024-06-25 Decision Sciences Medical Company, LLC Methods for manufacturing and distributing semi-rigid acoustic coupling articles and packaging for ultrasound imaging
US11154274B2 (en) 2019-04-23 2021-10-26 Decision Sciences Medical Company, LLC Semi-rigid acoustic coupling articles for ultrasound diagnostic and treatment applications
US11520043B2 (en) 2020-11-13 2022-12-06 Decision Sciences Medical Company, LLC Systems and methods for synthetic aperture ultrasound imaging of an object
US12320893B2 (en) 2020-11-13 2025-06-03 Decision Sciences Medical Company, LLC Systems and methods for synthetic aperture ultrasound imaging of an object
CN115006823B (en) * 2022-06-09 2023-07-14 渤海大学 A sprint motion tracking device and its control platform for physical training
CN115006823A (en) * 2022-06-09 2022-09-06 渤海大学 Dash motion tracking means and control platform that sports training used

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