WO2001086311A1 - Ensemble tete fantome et procede pour mesurer l'incidence d'ondes electromagnetiques au moyen de cette tete fantome - Google Patents

Ensemble tete fantome et procede pour mesurer l'incidence d'ondes electromagnetiques au moyen de cette tete fantome Download PDF

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Publication number
WO2001086311A1
WO2001086311A1 PCT/SE2001/000999 SE0100999W WO0186311A1 WO 2001086311 A1 WO2001086311 A1 WO 2001086311A1 SE 0100999 W SE0100999 W SE 0100999W WO 0186311 A1 WO0186311 A1 WO 0186311A1
Authority
WO
WIPO (PCT)
Prior art keywords
phantom
head
head phantom
wireless device
measuring
Prior art date
Application number
PCT/SE2001/000999
Other languages
English (en)
Inventor
Corbett Rowell
Jason Squire
Original Assignee
Integra Antennas Ltd
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
Priority claimed from SE0001689A external-priority patent/SE0001689L/xx
Application filed by Integra Antennas Ltd filed Critical Integra Antennas Ltd
Priority to AU2001258966A priority Critical patent/AU2001258966A1/en
Publication of WO2001086311A1 publication Critical patent/WO2001086311A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
    • G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
    • G01R29/0857—Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism

Definitions

  • a head phantom arrangement and method of measuring of affect of electromagnetic waves by means of this head phantom are described in detail below.
  • the present invention relates to an arrangement for simulating and measuring electromagnetic waves' (specially microwaves') effect on a human head and more particularly to a head phantom.
  • the first is new coding technologies GPRS and EDGE, which will allow (in the near future) faster data rates on existing mobile technology. This will speed up development of wireless add-ons for existing laptop and PDA technology.
  • Bluetooth will allow any electronic object to communicate with another object, forming small wireless networks. Wireless technology will then expand into home appliances, desktops, automobiles, security, and a whole host of other areas.
  • UMTS third-generation mobile technology
  • Solid graphite phantom This is a solid piece of carbonised graphite corresponding to the brain properties.
  • phantom One problem common to both types of phantom is the single tissue aspect.
  • the properties of the phantom on wireless devices are an area consisting of mostly empirical evidence. Theory shows that each layer a nearby object has different effects on the radiating devices, i.e. electromagnetic waves have different properties at the interfaces between materials than through the entire material in terms of reflected and transmitted energies.
  • US 5,841,288 provides apparatus and methods for determining electric field properties of an inhomogeneous target.
  • the electric property distribution on a coarse mesh discretization of the target is first estimated; and then the electric field on a fine mesh discretization of the target is computed.
  • the fine mesh has finer discretization than the coarse mesh and is overlapping with the coarse mesh.
  • the electric field is then measured at preselected measurement sites within a homogeneous region external to the target.
  • a Jacobian matrix is also calculated which represents a sensitivity calculation relative to a change in the electric field at selected measurement sites due to a perturbation in the electric property distribution on the coarse mesh.
  • a difference vector is formed between the computed electric field and the measured electric field, and an update vector is added to the electrical property distribution as a function of the difference vector and the Jacobian matrix.
  • the electric field is then re-computed based on the updated electric property distribution, which is compared with the measured electric field to produce a least squared error. If this error is not sufficiently small, the steps above, beginning with computing a Jacobian matrix, are repeated until the error is sufficiently small.
  • DE 3 941 332 relates to a combined teaching and practising apparatus.
  • the apparatus is adapted for an optimized simulation and practice in dental-clinical work or operating procedures, as well as also being adapted for purely dental-technical work and which, in addition thereto, ensures that the apparatus is suited for right-handed as well as left-handed persons, and which affords for an optimum savings in space at uniformly maintained quality in the teaching or educating of the students.
  • a parameter of a magnetic or an electromagnetic field is monitored by placing a crystal in the field, the crystal being irradiated with electromagnetic radiation, for example laser light.
  • the crystal which may be piezo-electric crystal (such as quartz), is of the kind in which an optical quality e.g. transmissivity of the crystal is affected by the parameter. That optical quality is monitored by photo-detector and an output signal representative of that quality and therefore the parameter generated.
  • the apparatus may be used for measuring the bio-electrical signals of the brain, when it is incorporated in a light-proof container of a headset.
  • non of mentioned documents relate to an arrangement that directly simulates a human skull and allow a near to natural measurement of effects of the electromagnetic waves to a human skull.
  • the main object of the present invention is to provide an arrangement which overcomes the above- mentioned problems and provides a more lifelike and light phantom, mainly for use in wireless measurement systems.
  • a head phantom arrangement for measuring impact of electromagnetical waves, which consists of an at least partly hollow skull structure filled with a substance acting as brain material and provided with an outer layer acting as skin.
  • said skull structure is made of bonemeal
  • said skin is made of latex or polymeric material
  • said substance consists of a substantially lightweight graphite foam or a liquid substance.
  • the phantom head can be arranged on a supporting structure acting as a shoulder.
  • the phantom can also be arranged in the shape of a flattened surface to provide more repeatable measurements by reducing the curvature and be attached on a mounting for measurement purposes.
  • FIG. 1 is a very schematic illustration of an embodiment of the invention
  • Fig. 2 is an enlarged view of the encircled section in fig. 1.
  • the present invention suggests a new type of phantom head 10, as shown in figs. 1 and 2, with at least three material parts: a skin layer 20, bone layer 30, and a brain section 40.
  • the brain cavity 41 may be filled (at least partly) with either lightweight graphite foam or the traditional liquid.
  • the bone 30, preferably made from bonemeal, is formed into the shape of a typical (human) skull and skin 20 of, e.g. latex material, is fitted over the skull.
  • the resulting head 10 is more accurate, because three materials as opposed to 1-2 are more lifelike, and lightweight under, e.g. 10 kilograms.
  • the bonemeal mainly consists of calcium phosphate and calcium carbonate.
  • the latex can be substituted by any other suitable polymeric material or the like.
  • the phantom head 10 is arranged on a supporting structure 50, which can act as a shoulder. It is also possible to provide the phantom head in the shape of a flattened surface to provide more repeatable measurements by reducing the curvature.
  • the phantom head can be attached on a mounting for measurement purposes.
  • the phantom is mounted to the turntable with the wireless device mounted on the phantom.
  • the phantom may be filled with either lightweight foam for 3-D measurements or liquid for 2-D measurements (for 3-D measurements, one wants a light head to produce less tension on the turntable).
  • the phantom may be split into half and filled with liquid.
  • a field probe goes into the liquid to measure the field strength from the wireless device near the phantom.
  • the phantom is filled with a lightweight foam. Inside the foam are embedded fiber optic probes which can measure the near field from the wireless device.

Abstract

L'invention concerne un ensemble tête fantôme (10) pour mesurer l'incidence d'ondes magnétiques. Il est constitué d'une structure (30) en forme de crâne, au moins en partie creuse, remplie d'une substance (40) représentant le cerveau et dotée d'une couche extérieure faisant office de peau.
PCT/SE2001/000999 2000-05-05 2001-05-07 Ensemble tete fantome et procede pour mesurer l'incidence d'ondes electromagnetiques au moyen de cette tete fantome WO2001086311A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001258966A AU2001258966A1 (en) 2000-05-05 2001-05-07 A head phantom arrangement and method of measuring of affect of electromagnetic waves by means of this head phantom

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US20193400P 2000-05-05 2000-05-05
SE0001689-9 2000-05-05
US60/201,934 2000-05-05
SE0001689A SE0001689L (sv) 2000-05-05 2000-05-05 Fantomarrangemang för mikrovågsmätningar

Publications (1)

Publication Number Publication Date
WO2001086311A1 true WO2001086311A1 (fr) 2001-11-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/000999 WO2001086311A1 (fr) 2000-05-05 2001-05-07 Ensemble tete fantome et procede pour mesurer l'incidence d'ondes electromagnetiques au moyen de cette tete fantome

Country Status (2)

Country Link
AU (1) AU2001258966A1 (fr)
WO (1) WO2001086311A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1326070A1 (fr) * 2001-08-08 2003-07-09 NTT DoCoMo, Inc. Dispositif de mesure de la puissance d'absorption
WO2004048949A1 (fr) * 2002-11-22 2004-06-10 The Education & Research Foundation For Industry, University, And Research Institute In Chungnam National University Systeme de mesure du taux d'absorption specifique (sar) et son procede de fonctionnement
WO2004079299A2 (fr) * 2003-02-27 2004-09-16 Supelec Procede et systeme pour mesurer un debit d’absorption specifique das
EP1653237A1 (fr) * 2004-11-02 2006-05-03 NTT DoCoMo, Inc. Système et procédé pour pour mesurer le taux d'absorption spécifique (SAR)
WO2012136217A1 (fr) * 2011-04-05 2012-10-11 Nycomed Pharma As Dispositif et procédé d'entraînement médical
US9880251B2 (en) 2015-09-04 2018-01-30 Synaptive Medical (Barbados) Inc. Cerebrospinal diffusion phantom
CN108027398A (zh) * 2015-07-24 2018-05-11 雷恩第大学 用于电磁剂量测定的设备和相关方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941332A1 (de) * 1989-12-14 1991-06-20 Kaltenbach & Voigt Kombiniertes lehr- und uebungsgeraet
GB2261503A (en) * 1991-10-08 1993-05-19 Novacare Products Limited Monitoring a parameter of a magnetic or electromagnetic field
US5841288A (en) * 1996-02-12 1998-11-24 Microwave Imaging System Technologies, Inc. Two-dimensional microwave imaging apparatus and methods

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941332A1 (de) * 1989-12-14 1991-06-20 Kaltenbach & Voigt Kombiniertes lehr- und uebungsgeraet
GB2261503A (en) * 1991-10-08 1993-05-19 Novacare Products Limited Monitoring a parameter of a magnetic or electromagnetic field
US5841288A (en) * 1996-02-12 1998-11-24 Microwave Imaging System Technologies, Inc. Two-dimensional microwave imaging apparatus and methods

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1326070A1 (fr) * 2001-08-08 2003-07-09 NTT DoCoMo, Inc. Dispositif de mesure de la puissance d'absorption
EP1326070B1 (fr) * 2001-08-08 2013-07-10 NTT DoCoMo, Inc. Dispositif de mesure de la puissance d'absorption
WO2004048949A1 (fr) * 2002-11-22 2004-06-10 The Education & Research Foundation For Industry, University, And Research Institute In Chungnam National University Systeme de mesure du taux d'absorption specifique (sar) et son procede de fonctionnement
WO2004079299A2 (fr) * 2003-02-27 2004-09-16 Supelec Procede et systeme pour mesurer un debit d’absorption specifique das
WO2004079299A3 (fr) * 2003-02-27 2005-01-20 Supelec Procede et systeme pour mesurer un debit d’absorption specifique das
EP1653237A1 (fr) * 2004-11-02 2006-05-03 NTT DoCoMo, Inc. Système et procédé pour pour mesurer le taux d'absorption spécifique (SAR)
US7511511B2 (en) 2004-11-02 2009-03-31 Ntt Docomo, Inc. Specific absorption rate measuring system, and a method thereof
WO2012136217A1 (fr) * 2011-04-05 2012-10-11 Nycomed Pharma As Dispositif et procédé d'entraînement médical
EA023877B1 (ru) * 2011-04-05 2016-07-29 Такеда Никомед Ас Макет головы для медицинской подготовки хирургов и способ
EA023877B9 (ru) * 2011-04-05 2016-10-31 Такеда Никомед Ас Макет головы для медицинской подготовки хирургов и способ
CN108027398A (zh) * 2015-07-24 2018-05-11 雷恩第大学 用于电磁剂量测定的设备和相关方法
US9880251B2 (en) 2015-09-04 2018-01-30 Synaptive Medical (Barbados) Inc. Cerebrospinal diffusion phantom

Also Published As

Publication number Publication date
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