WO1998017178B1 - Measurement of object layer thickness using ultra-sonic methods and devices - Google Patents

Measurement of object layer thickness using ultra-sonic methods and devices

Info

Publication number
WO1998017178B1
WO1998017178B1 PCT/US1997/018993 US9718993W WO9817178B1 WO 1998017178 B1 WO1998017178 B1 WO 1998017178B1 US 9718993 W US9718993 W US 9718993W WO 9817178 B1 WO9817178 B1 WO 9817178B1
Authority
WO
WIPO (PCT)
Prior art keywords
ultra
sonic
measurement
reflective distance
shortest reflective
Prior art date
Application number
PCT/US1997/018993
Other languages
French (fr)
Other versions
WO1998017178A1 (en
Filing date
Publication date
Priority claimed from US08/731,821 external-priority patent/US5941825A/en
Application filed filed Critical
Priority to CA002269450A priority Critical patent/CA2269450A1/en
Priority to EP97911828A priority patent/EP1006879B1/en
Priority to JP51957098A priority patent/JP2002512537A/en
Priority to AT97911828T priority patent/ATE247925T1/en
Priority to DE69724468T priority patent/DE69724468D1/en
Priority to AU49114/97A priority patent/AU736441B2/en
Publication of WO1998017178A1 publication Critical patent/WO1998017178A1/en
Publication of WO1998017178B1 publication Critical patent/WO1998017178B1/en
Priority to US10/207,707 priority patent/US6585652B2/en

Links

Abstract

The present invention provides for a method of measuring layer thickness in an object comprising transmitting at least a first and a second ultra-sonic pulse from at least a first and second position; measuring at least one reflective distance from the first pulse and at least one reflective distance from the second pulse, wherein the reflective distance is from the object's external surface (or probe) to a reflective interface (5) of at least one layer; selecting the reflective distance having the shortest reflective distance to indicate the distance between the external surface (or probe surface) and the reflective interface (5) of at least one layer, wherein the selecting of the shortest reflective distance reduces ultra-sonic transmission parallax of the first and second pulses relative to a plane (4) in the object.

Claims

AMENDED CLAIMS
[received by the International Bureau on 29 May 1998 (29.05.98); original claim 28 amended; remaining claims unchanged (1 page)]
27. The method of claim 25. further comprising a computational unit that corrects for non-orthogonal probe alignment, wherein said computational unit permits computional determination of a shortest reflective distance using at least the following equation to calculate reflective distances: d=SOS x t/2. 28. A compact ultra-sonic system, comprising: at least a first ultra-sonic source and a second ultra-sonic source in a probe, said first ultra-sonic source provides a first pulse with a first transmission angle for the measurement of a shortest reflective distance with respect to a plane of an object and said second ultra-sonic source provides a second pulse with a second transmission angle for the measurement of a shortest reflective distance with respect to said plane. said first ultra-sonic source has a first detector that receives an alpha ultra-sonic signal, and said second ultra-sonic source has a second detector that receives a beta ultra-sonic signal, wherein said first transmission angle and said second transmission angle improve the measurement of a shortest reflective distance compared to the measurement of a shortest reflective distance in the absence of said first transmission angle and said second transmission angle, or further wherein said first ultra-sonic source and second ultra-sonic source comprise at least one linear array of ultra-sonic crystals that can be sequentially timed to improve measurement of said shortest reflective distance compared to the measurement of said shortest reflective in the absence of said sequential timing.
29. The ultra-sonic system of claim 28, wherein said probe has a hand held housing adapted for interrogating said object and said object is a human. 30. The ultra-sonic system of claim 29, further comprising a computational unit that corrects for non-orthogonal probe alignment, wherein said computational unit permits computational determination of a shortest reflective distance.
31. The ultra-sonic system of claim 30. wherein said human comprises body adipose tissue and said shortest reflective distance is in a tissue with 1) a skin/adipose tissue interface and 2) an adipose tissue/muscle tissue or adipose tissue/fascia interface.
32. The ultra-sonic system of claim 28, wherein said second ultra-sonic source transmits said beta ultra-sonic signal.
PCT/US1997/018993 1996-10-21 1997-10-21 Measurement of object layer thickness using ultra-sonic methods and devices WO1998017178A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA002269450A CA2269450A1 (en) 1996-10-21 1997-10-21 Measurement of object layer thickness using ultra-sonic methods and devices
EP97911828A EP1006879B1 (en) 1996-10-21 1997-10-21 Measurement of object layer thickness using ultra-sonic methods and devices
JP51957098A JP2002512537A (en) 1996-10-21 1997-10-21 Method for measuring layer structure of object using ultrasonic method and apparatus
AT97911828T ATE247925T1 (en) 1996-10-21 1997-10-21 ULTRASONIC METHOD AND DEVICE FOR MEASURING THE LAYER THICKNESS OF A BODY
DE69724468T DE69724468D1 (en) 1996-10-21 1997-10-21 ULTRASONIC METHOD AND DEVICE FOR MEASURING THE LAYER THICKNESS OF A BODY
AU49114/97A AU736441B2 (en) 1996-10-21 1997-10-21 Measurement of object layer thickness using ultra-sonic methods and devices
US10/207,707 US6585652B2 (en) 1996-10-21 2002-07-29 Measurement of object layer thickness using handheld ultra-sonic devices and methods thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/731,821 1996-10-21
US08/731,821 US5941825A (en) 1996-10-21 1996-10-21 Measurement of body fat using ultrasound methods and devices

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US08/731,821 Continuation-In-Part US5941825A (en) 1996-10-21 1996-10-21 Measurement of body fat using ultrasound methods and devices

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US27358699A Continuation 1996-10-21 1999-03-22

Publications (2)

Publication Number Publication Date
WO1998017178A1 WO1998017178A1 (en) 1998-04-30
WO1998017178B1 true WO1998017178B1 (en) 1998-07-16

Family

ID=24941093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/018993 WO1998017178A1 (en) 1996-10-21 1997-10-21 Measurement of object layer thickness using ultra-sonic methods and devices

Country Status (8)

Country Link
US (2) US5941825A (en)
EP (1) EP1006879B1 (en)
JP (1) JP2002512537A (en)
AT (1) ATE247925T1 (en)
AU (1) AU736441B2 (en)
CA (1) CA2269450A1 (en)
DE (1) DE69724468D1 (en)
WO (1) WO1998017178A1 (en)

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