WO2003073046A1 - Flow-rate conservative doppler estimate - Google Patents
Flow-rate conservative doppler estimate Download PDFInfo
- Publication number
- WO2003073046A1 WO2003073046A1 PCT/IT2002/000115 IT0200115W WO03073046A1 WO 2003073046 A1 WO2003073046 A1 WO 2003073046A1 IT 0200115 W IT0200115 W IT 0200115W WO 03073046 A1 WO03073046 A1 WO 03073046A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flow
- doppler
- doppler data
- estimate
- evaluate
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/72—Devices for measuring pulsing fluid flows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/663—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by measuring Doppler frequency shift
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
-
- 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
- G01S15/8979—Combined Doppler and pulse-echo imaging systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/06—Measuring blood flow
- A61B8/065—Measuring blood flow to determine blood output from the heart
Definitions
- the two-dimensional color Doppler while able to provide detailed information regarding the instantaneous velocity of flow parallel to the Doppler scan direction, is unable to represent the orthogonal components of flow velocities. Obviously, such an approach is inherently inaccurate for the estimation of the regurgitant volume.
- the two-dimensional velocity data obtained by a Doppler measure are the axial (vertical) component of velocity.
- the Doppler image is the map of the vertical component of velocity v z (x,z).
- the optimal symmetric axis can be extracted manually, or on the basis of additional data, or estimated automatically from a maximum similarity concept between left and right velocity half- fields.
- the continuity equation in its differential form gives a relation between the axial variation of the axial component of velocity, v z (r,z), and the radial variation of the radial component, v r (r,z).
- the continuity equation reads (9 ' 10) dv_ drv r n r + ⁇ - 0 - ⁇ • >
- the flow rate passing through any axisymmetric surface can be immediately evaluated. Being blood incompressible, the flow through the valve is equal to the total flow crossing any axisymmetric surface surrounding the valve. Indicating with i the imprint-curve of the surface on a meridian plane, the flow rate Q is: where v tun is the projection of the velocity vector in the direction normal to the curve (figure 4). By summating all the elementary contribution at the boundary of the control volume, we evaluate the total instantaneous flow rate Q from equation 3.
- This new methodology resulting from the serial combination of the passages outlined above is a method that allows to evaluate the valvular flow, on the basis of the normal Doppler data measured from echographs atad commonly represented in an image form.
- the eventual software applications is based on the core steps outlined above, the details of the eventual product depends on the hosting equipment, the required human interface, the programmer choices, and the features of the programming language chosen for the implementation.
- Two different software applications have been prepared, in two different languages, in order to start the testing of the method and its comparison with the former PISA technique.
- This new approach has been tested in a carefully controlled numerically generated Doppler map, with an in vitro standard equipment, and with clinical cases to verify its applicability. The results confirm the physical consistency and accuracy of the method.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2002/000115 WO2003073046A1 (en) | 2002-02-27 | 2002-02-27 | Flow-rate conservative doppler estimate |
EP02708625.5A EP1511974B1 (en) | 2002-02-27 | 2002-02-27 | Flow-rate conservative doppler estimate |
US10/506,003 US7270635B2 (en) | 2002-02-27 | 2002-02-27 | Flow-rate conservative doppler estimate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2002/000115 WO2003073046A1 (en) | 2002-02-27 | 2002-02-27 | Flow-rate conservative doppler estimate |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003073046A1 true WO2003073046A1 (en) | 2003-09-04 |
Family
ID=27764145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2002/000115 WO2003073046A1 (en) | 2002-02-27 | 2002-02-27 | Flow-rate conservative doppler estimate |
Country Status (3)
Country | Link |
---|---|
US (1) | US7270635B2 (en) |
EP (1) | EP1511974B1 (en) |
WO (1) | WO2003073046A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010046330A1 (en) * | 2008-10-24 | 2010-04-29 | Tomtec Imaging Systems Gmbh | Three-dimensional derivation of a proximal isokinetic shell of a proximal flow convergence zone and three-dimensional pisa flow measurement |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9028413B2 (en) * | 2010-03-08 | 2015-05-12 | Siemens Medical Solutions Usa, Inc. | Prediction-based flow estimation for ultrasound diagnostic imaging |
EP2514368B1 (en) | 2011-04-18 | 2017-09-20 | TomTec Imaging Systems GmbH | Method for transforming a Doppler velocity dataset into a velocity vector field |
JP5497821B2 (en) * | 2012-03-16 | 2014-05-21 | 国立大学法人 東京大学 | Fluid flow velocity detection device and program |
US9462954B2 (en) * | 2013-09-04 | 2016-10-11 | Siemens Aktiengesellschaft | Method and system for blood flow velocity reconstruction from medical images |
JP5750181B1 (en) * | 2014-03-31 | 2015-07-15 | 日立アロカメディカル株式会社 | Ultrasonic diagnostic equipment |
US11506783B2 (en) | 2018-03-09 | 2022-11-22 | Purdue Research Foundation | Method of processing an image |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5062427A (en) * | 1988-05-06 | 1991-11-05 | Kabushiki Kaisha Toshiba | Ultrasonic doppler apparatus |
WO2000051495A1 (en) | 1999-03-05 | 2000-09-08 | The General Hospital Corporation | Measuring volume flow and area for a dynamic orifice |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4913159A (en) * | 1989-03-17 | 1990-04-03 | Hitachi Medial Corp. | Method for determining blood flow through a narrowed orifice using color doppler echocardiography |
US6149595A (en) * | 1998-07-02 | 2000-11-21 | Seitz; Walter S. | Noninvasive apparatus and method for the determination of cardiac valve function |
US6868739B1 (en) * | 1999-10-19 | 2005-03-22 | Transonic Systems, Inc. | Method and apparatus to measure blood flow by an introduced volume change |
US6719697B2 (en) * | 2001-02-27 | 2004-04-13 | Koninklijke Philips Electronics N.V. | Ultrasonic quantification of valvular regurgitant blood flow |
-
2002
- 2002-02-27 US US10/506,003 patent/US7270635B2/en not_active Expired - Lifetime
- 2002-02-27 EP EP02708625.5A patent/EP1511974B1/en not_active Expired - Lifetime
- 2002-02-27 WO PCT/IT2002/000115 patent/WO2003073046A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5062427A (en) * | 1988-05-06 | 1991-11-05 | Kabushiki Kaisha Toshiba | Ultrasonic doppler apparatus |
WO2000051495A1 (en) | 1999-03-05 | 2000-09-08 | The General Hospital Corporation | Measuring volume flow and area for a dynamic orifice |
Non-Patent Citations (10)
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010046330A1 (en) * | 2008-10-24 | 2010-04-29 | Tomtec Imaging Systems Gmbh | Three-dimensional derivation of a proximal isokinetic shell of a proximal flow convergence zone and three-dimensional pisa flow measurement |
US8911375B2 (en) | 2008-10-24 | 2014-12-16 | Tomtec Imaging Systems Gmbh | Three-dimensional derivation of a proximal isokinetic shell of a proximal flow convergence zone and three-dimensional PISA flow measurement |
Also Published As
Publication number | Publication date |
---|---|
US20050107705A1 (en) | 2005-05-19 |
EP1511974B1 (en) | 2016-08-10 |
EP1511974A1 (en) | 2005-03-09 |
US7270635B2 (en) | 2007-09-18 |
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