EP2160597A2 - Procede de caracterisation rheologique d'un milieu viscoelastique - Google Patents
Procede de caracterisation rheologique d'un milieu viscoelastiqueInfo
- Publication number
- EP2160597A2 EP2160597A2 EP08806061A EP08806061A EP2160597A2 EP 2160597 A2 EP2160597 A2 EP 2160597A2 EP 08806061 A EP08806061 A EP 08806061A EP 08806061 A EP08806061 A EP 08806061A EP 2160597 A2 EP2160597 A2 EP 2160597A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- medium
- deformation
- rheological
- excitation
- parameter
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/485—Diagnostic techniques involving measuring strain or elastic properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52023—Details of receivers
- G01S7/52036—Details of receivers using analysis of echo signal for target characterisation
- G01S7/52038—Details of receivers using analysis of echo signal for target characterisation involving non-linear properties of the propagation medium or of the reflective target
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0092—Visco-elasticity, solidification, curing, cross-linking degree, vulcanisation or strength properties of semi-solid materials
- G01N2203/0094—Visco-elasticity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02475—Tissue characterisation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02483—Other human or animal parts, e.g. bones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02491—Materials with nonlinear acoustic properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02827—Elastic parameters, strength or force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
Definitions
- the present invention relates to rheological characterization methods of a viscoelastic medium.
- the invention relates to a method for the rheological characterization of a viscoelastic medium, comprising the following steps:
- a particularly important application of this method is the imaging of the soft tissues of the human body, for example for the purpose of detecting cancers.
- WO-A-04 / 21,038 describes an example of such a method.
- the object of the present invention is to further improve the methods of this type, so as to improve the reliability and sensitivity of detection.
- a method of the kind in question is characterized in that during the characterization step, a non-zero power parameter y such that said parameter is determined in said plurality of middle points.
- one or more of the following provisions may also be used: during the characterization step, the parameter of scale b in said plurality of points of the medium; said rheological parameter x is an attenuation coefficient of the mechanical waves in the medium; said rheological parameter x is a coefficient of propagation of mechanical waves in the medium; said excitation generates a shear wave in the medium; said rheological parameter is the real part of the complex shear modulus G * of the medium; said rheological parameter is the imaginary part of the complex shear modulus G * of the medium; said excitation is generated locally by a mechanical vibrator which produces the shear wave from a point of contact between said vibrator and the medium; said shear wave is generated at a distance by emitting in the medium ultrasonic compression waves adapted to locally move the medium; during the step (b) of deformation measurement, an image of the deformation generated by the excitation is produced on a region with at least two dimensions belonging to said medium; during the step (b) of deformation measurement, an image of the de
- FIG. 1 is a two-dimensional MRI view of a breast of a patient with infiltrating ductal carcinoma, sectioned in a sagittal plane
- FIGS. 2-5 show cartographies of several rheological parameters of the breast of Figure 1, in the plane of Figure 1.
- the invention relates to a process for the rheological characterization of a viscoelastic medium 1, for example the soft tissues of an organ of the human body, especially for the purpose of identifying abnormalities such as cancers, from the analysis of the rheological parameters. in question.
- FIG. 1 represents an MRI section of a breast (constituting the aforementioned medium 1) of a patient suffering from invasive ductal carcinoma 2, corresponding to the area surrounded by a solid line in Figure 1.
- the diseased portion 2 of the medium 1 is not clearly distinguishable from the healthy portions on the MRI section.
- rheological parameters at least one point, or preferably over an entire region to obtain a map of this rheological parameter
- the vibratory excitation can for example generate a shear wave in the medium: either locally by an external mechanical vibrator which produces the shear wave from a point of contact between said vibrator and the medium (as described by example in WO-A-2000/55616), said vibrator then inducing an excitation whose spectrum can be monofrequential or wide, included for example in a frequency band between 0 and 10000 Hz, or remotely by emitting in the medium compressional ultrasonic waves adapted to locally move the medium (WO-A-2004/021038), these waves ultrasound can be of frequency for example between 0.1 and 50 MHz, focused or not, created by a network of independent transducers or a mono-element transducer.
- step (b) of deformation measurement said deformation is measured by a method chosen in particular from ultrasound and MRI, as illustrated for example in documents WO-A-2000/55616, WO-A -2004/021038, WO-A-2006/010213 mentioned above.
- step (b) of measuring deformation it is advantageous to carry out an image of the deformation (amplitude of deformation) generated by the excitation, on a region with at least two dimensions belonging to the medium 1, and during in step (c) of rheological characterization, it is advantageous to determine a cartography of the rheological parameter of the medium in said region.
- the imaginary part ex of k represents the attenuation of the wave whereas its real part ⁇ represents the propagation: these parameters are part of the parameters characterizing the rheology of the medium 1.
- at least one of the rheological parameters of the medium varies according to a power law of the frequency f.
- the power is generally between 0 and 2 for mechanical waves in biological tissues.
- r fo is a reference frequency
- the power law can concern one of the following rheological parameters:
- the estimation of the spatial variations of the rheological parameter (s) selected can be done by analyzing the spatio-temporal response of the medium to the mechanical excitation over the entire imagined zone, and in particular:
- shear waves have been propagated in the breast 1, the propagation of which has been observed by MRI by measuring the displacements u of the medium 1, then we used a rheological model based on a power law for attenuation of shear waves:
- the causality determines the fréguentiel behavior of the real part of the wave vector (the coefficient of propagation):
- a monochromatic external vibration (that is to say with a single vibrational frequency) was applied to the breast 1 of the patient by a mechanical vibrator.
- the displacement field u was measured by MRI and the complex shear modulus G * was deduced from these measurements:
- Figures 2 and 3 show such mappings of y and a () , obtained with a monochromatic excitation of frequency 80 Hz. These two mappings make it possible to locate with a great precision and with a strong contrast, the invasive ductal carcinoma of which the patient. Similar results can be obtained with Y and ⁇ 0 .
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0704535A FR2917831B1 (fr) | 2007-06-25 | 2007-06-25 | Procede de caracterisation rheologique d'un milieu viscoelastique |
PCT/FR2008/051129 WO2009007582A2 (fr) | 2007-06-25 | 2008-06-23 | Procede de caracterisation rheologique d'un milieu viscoelastique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2160597A2 true EP2160597A2 (fr) | 2010-03-10 |
Family
ID=38935903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08806061A Ceased EP2160597A2 (fr) | 2007-06-25 | 2008-06-23 | Procede de caracterisation rheologique d'un milieu viscoelastique |
Country Status (9)
Country | Link |
---|---|
US (1) | US8347692B2 (fr) |
EP (1) | EP2160597A2 (fr) |
JP (2) | JP2010531183A (fr) |
KR (2) | KR20150023945A (fr) |
CN (2) | CN102830163A (fr) |
CA (1) | CA2692296A1 (fr) |
FR (1) | FR2917831B1 (fr) |
IL (1) | IL202962A (fr) |
WO (1) | WO2009007582A2 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2899336B1 (fr) | 2006-03-29 | 2008-07-04 | Super Sonic Imagine | Procede et dispositif pour l'imagerie d'un milieu viscoelastique |
WO2009126378A2 (fr) | 2008-03-11 | 2009-10-15 | Drexel University | Sensibilité de détection améliorée avec capteurs micro-cantilevers piézoélectriques |
CN102066928B (zh) * | 2008-05-16 | 2015-08-05 | 德瑞索大学 | 评估组织的系统和方法 |
WO2010012092A1 (fr) * | 2008-07-30 | 2010-02-04 | Centre Hospitalier De L'universite De Montreal | Systeme et procede de detection, de caracterisation et d’imagerie d’heterogeneite par resonance induite par ondes de cisaillement |
FR2940444B1 (fr) * | 2008-12-24 | 2014-03-07 | Areva Np | Procede de caracterisation non destructif et sans contact d'une structure multi-couche sensiblement spherique et dispositif associe |
US20100286520A1 (en) * | 2009-05-11 | 2010-11-11 | General Electric Company | Ultrasound system and method to determine mechanical properties of a target region |
RU2552894C2 (ru) * | 2009-11-25 | 2015-06-10 | Конинклейке Филипс Электроникс Н.В. | Ультразвуковая визуализация волн сдвига с формированием сфокусированных пучков сканирующих линий |
US9140781B2 (en) | 2010-04-20 | 2015-09-22 | Super Sonic Imagine | Imaging method and apparatus using shear waves |
ES2967784T3 (es) | 2011-02-15 | 2024-05-03 | Hemosonics Llc | Caracterización de la hemostasia sanguínea y los parámetros de transporte de oxígeno |
EP2958496B1 (fr) * | 2013-02-25 | 2017-05-03 | Koninklijke Philips N.V. | Détermination de la répartition de la concentration d'éléments dispersifs par ultrasons |
WO2014201020A1 (fr) * | 2013-06-10 | 2014-12-18 | Mayo Foundation For Medical Education And Research | Système et procédé destinés à la récupération de fluage par force de rayonnement acoustique et à la propagation d'onde de cisaillement pour l'imagerie de l'élasticité |
US9726647B2 (en) | 2015-03-17 | 2017-08-08 | Hemosonics, Llc | Determining mechanical properties via ultrasound-induced resonance |
US11154277B2 (en) | 2017-10-31 | 2021-10-26 | Siemens Medical Solutions Usa, Inc. | Tissue viscoelastic estimation from shear velocity in ultrasound medical imaging |
CN114280030B (zh) * | 2021-12-24 | 2023-07-21 | 中国科学院近代物理研究所 | 基于激光诱导击穿光谱的软物质粘弹性表征方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58173539A (ja) * | 1982-04-07 | 1983-10-12 | 富士通株式会社 | 超音波による生体組織特性測定方法 |
US5115808A (en) * | 1988-02-19 | 1992-05-26 | Institute Of General And Physical Chemistry | Method and device for noninvasive acoustic testing of elasticity of soft biological tissues |
JP3686698B2 (ja) * | 1995-03-20 | 2005-08-24 | オリンパス株式会社 | 触覚センサプローブ |
US5810731A (en) * | 1995-11-13 | 1998-09-22 | Artann Laboratories | Method and apparatus for elasticity imaging using remotely induced shear wave |
KR980007744U (ko) * | 1996-07-31 | 1998-04-30 | 김영귀 | 우천시 차량용 앞유리 물기제거구조 |
FR2791136B1 (fr) * | 1999-03-15 | 2001-06-08 | Mathias Fink | Procede et dispositif d'imagerie utilisant les ondes de cisaillement |
ATE336717T1 (de) * | 2001-05-17 | 2006-09-15 | Xenogen Corp | Verfahren und vorrichtung zur feststellung von zieltiefe, helligkeit und grösse in einer körperregion |
US7578789B2 (en) * | 2002-08-08 | 2009-08-25 | Echosens | Device and method for measuring the elasticity of a human or animal organ |
FR2844178B1 (fr) * | 2002-09-06 | 2005-09-09 | Dispositif et procede pour la mesure de l'elasticite d'un organe humain ou animal et l'etablissement d'une representation a deux ou trois dimensions de cette elasticite | |
US7437912B2 (en) * | 2004-07-19 | 2008-10-21 | Integrated Sensing Systems, Inc. | Device and method for sensing rheological properties of a fluid |
US7353709B2 (en) * | 2005-07-06 | 2008-04-08 | National Research Council Of Canada | Method and system for determining material properties using ultrasonic attenuation |
WO2007003058A1 (fr) * | 2005-07-06 | 2007-01-11 | National Research Council Of Canada | Procede et systeme de determination de proprietes de materiaux a l'aide de l'attenuation ultrasonore |
US8394026B2 (en) * | 2008-11-03 | 2013-03-12 | University Of British Columbia | Method and apparatus for determining viscoelastic parameters in tissue |
-
2007
- 2007-06-25 FR FR0704535A patent/FR2917831B1/fr active Active
-
2008
- 2008-06-23 CN CN2012102930576A patent/CN102830163A/zh active Pending
- 2008-06-23 CA CA002692296A patent/CA2692296A1/fr not_active Abandoned
- 2008-06-23 US US12/666,240 patent/US8347692B2/en active Active
- 2008-06-23 CN CN2008801052097A patent/CN101918828A/zh active Pending
- 2008-06-23 JP JP2010514057A patent/JP2010531183A/ja active Pending
- 2008-06-23 KR KR20157003316A patent/KR20150023945A/ko not_active Application Discontinuation
- 2008-06-23 EP EP08806061A patent/EP2160597A2/fr not_active Ceased
- 2008-06-23 KR KR1020107001456A patent/KR101633804B1/ko active IP Right Grant
- 2008-06-23 WO PCT/FR2008/051129 patent/WO2009007582A2/fr active Application Filing
-
2009
- 2009-12-24 IL IL202962A patent/IL202962A/en not_active IP Right Cessation
-
2014
- 2014-08-08 JP JP2014162952A patent/JP5864680B2/ja active Active
Non-Patent Citations (4)
Title |
---|
B LARRAT ET AL: "High Resolution MR-Elastography of In-Vivo Rat Brain - Understanding the Scaling Behaviour of the Structures", PROC. INTL. SOC. MAG. RESON. MED. 15, 25 May 2007 (2007-05-25), Berlin, pages 1255, XP055051068, Retrieved from the Internet <URL:http://cds.ismrm.org/ismrm-2007/files/01255.pdf> [retrieved on 20130124] * |
LARRAT B. ET AL: "High Resolution MR-Elastography of In-Vivo Rat Brain - Understanding the Scaling Behaviour of the Structures", PROC. INTL. SOC. MAG. RESON. MED. 15, 25 May 2007 (2007-05-25), BERLIN, pages 1255, XP055051068 |
R SINKUS ET AL: "Breast Cancer exhibits liquid-like mechanical properties - A comparative study between MR-Mammography and MRElastography", PROC. INTL. SOC. MAG. RESON. MED., 25 May 2007 (2007-05-25), Berlin, pages 963, XP055051062, Retrieved from the Internet <URL:http://cds.ismrm.org/ismrm-2007/files/00963.pdf> [retrieved on 20130124] * |
SINKUS R. ET AL: "Breast Cancer exhibits liquid-like mechanical properties - A comparative study between MR-Mammography and MRElastography", PROC. INTL. SOC. MAG. RESON. MED., 25 May 2007 (2007-05-25), BERLIN, pages 963, XP055051062 |
Also Published As
Publication number | Publication date |
---|---|
KR101633804B1 (ko) | 2016-06-27 |
US8347692B2 (en) | 2013-01-08 |
FR2917831B1 (fr) | 2009-10-30 |
WO2009007582A2 (fr) | 2009-01-15 |
JP2010531183A (ja) | 2010-09-24 |
CA2692296A1 (fr) | 2009-01-15 |
JP5864680B2 (ja) | 2016-02-17 |
FR2917831A1 (fr) | 2008-12-26 |
US20100170342A1 (en) | 2010-07-08 |
WO2009007582A3 (fr) | 2009-03-12 |
CN102830163A (zh) | 2012-12-19 |
IL202962A (en) | 2014-08-31 |
CN101918828A (zh) | 2010-12-15 |
JP2015006405A (ja) | 2015-01-15 |
KR20100050469A (ko) | 2010-05-13 |
KR20150023945A (ko) | 2015-03-05 |
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