EP2280643A1 - Mikrowellenuntersuchung mit einem kontrastmittel - Google Patents
Mikrowellenuntersuchung mit einem kontrastmittelInfo
- Publication number
- EP2280643A1 EP2280643A1 EP09757265A EP09757265A EP2280643A1 EP 2280643 A1 EP2280643 A1 EP 2280643A1 EP 09757265 A EP09757265 A EP 09757265A EP 09757265 A EP09757265 A EP 09757265A EP 2280643 A1 EP2280643 A1 EP 2280643A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contrast agent
- microwave
- examined
- ion
- gadolinium
- 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.)
- Withdrawn
Links
- 239000002872 contrast media Substances 0.000 title claims abstract description 79
- 230000005291 magnetic effect Effects 0.000 claims description 21
- 230000010287 polarization Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- -1 aluminum ion Chemical class 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 12
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 12
- 229910052713 technetium Inorganic materials 0.000 claims description 10
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 8
- RJOJUSXNYCILHH-UHFFFAOYSA-N gadolinium(3+) Chemical compound [Gd+3] RJOJUSXNYCILHH-UHFFFAOYSA-N 0.000 claims description 7
- 230000005298 paramagnetic effect Effects 0.000 claims description 6
- 238000003325 tomography Methods 0.000 claims description 6
- GNLKWNDGIOCMRL-UHFFFAOYSA-K [Gd+3].CC(O)=O.CC(O)=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.NCCNCCN Chemical compound [Gd+3].CC(O)=O.CC(O)=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.NCCNCCN GNLKWNDGIOCMRL-UHFFFAOYSA-K 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 claims description 5
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 4
- 206010028980 Neoplasm Diseases 0.000 claims description 4
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 4
- 230000002238 attenuated effect Effects 0.000 claims description 3
- 150000002251 gadolinium compounds Chemical class 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 150000001768 cations Chemical class 0.000 claims 2
- 238000003745 diagnosis Methods 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 description 19
- 125000004432 carbon atom Chemical group C* 0.000 description 19
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 4
- GKLVYJBZJHMRIY-UHFFFAOYSA-N technetium atom Chemical compound [Tc] GKLVYJBZJHMRIY-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000007727 cost benefit analysis Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves using microwaves or terahertz waves
Definitions
- the invention relates to a method, a
- Measuring device a contrast agent and the use of a contrast agent for microwave-based examination.
- Dielectric constants of objects to be examined, in particular living tissue are in part very homogeneous. Reliable results, which can be displayed in high contrast, are not always achievable with conventional microwave-based investigations.
- magnetic resonance tomographies are prepared. With the help of contrast agents, more accurate results are achieved.
- the preparation of magnetic resonance tomography requires a lot of effort. Furthermore, such an examination in intensive care patients is only possible with difficulty.
- DE 44 33 572 A1 shows the use of gadolinium diethylenetriamine pentaacetate (Gd-DTPA) as a contrast agent in magnetic resonance examinations.
- Gd-DTPA gadolinium diethylenetriamine pentaacetate
- the invention is based on the object to provide a measuring device, a use, a contrast agent and a method for the examination of objects, which allow a low-load, accurate examination, and only require little effort.
- the object is achieved according to the invention for the device by the features of independent claim 1, for use by the features of independent claim 4, for the contrast agent by the features of independent claim 10 and for the method by the features of independent claim 15.
- Advantageous developments are the subject of the dependent claims.
- a measuring device includes a microwave transmitter, a microwave receiver, a control device, a contrast agent, and an electromagnet.
- the controller controls the microwave transmitter, the microwave receiver and the electromagnet.
- the contrast agent is incorporated in an object to be examined.
- the electromagnet acts on the object to be examined with a magnetic field.
- the contrast agent changes its polarization properties as a function of the field strength of the magnetic field.
- the microwave transmitter sends a microwave signal into the object to be examined.
- the object to be examined and the contrast agent scatter the microwave signal.
- the contrast agent changes a polarization of the microwave signal.
- the microwave receiver receives the scattered and polarized microwave signal. Thus, with little effort, a low-load examination of the object can be performed.
- the microwave transmitter and / or the microwave receiver preferably focus successively on a plurality of locations within the object to be examined. So a high spatial resolution is achievable.
- the control device preferably determines a microwave tomography from the received microwave signal. This achieves a detailed three-dimensional image.
- a contrast agent is used in the microwave-based examination of an object.
- the contrast agent is introduced into the object to be examined.
- the contrast agent has a different permittivity and / or conductivity and / or polarization effect compared to its surroundings in the object to be examined. This achieves an increase in the accuracy of the microwave-based examination.
- the contrast agent preferably contains a paramagnetic metal ion, preferably a gadolinium ion (Gd 3+ ) or an iron ion (Fe 3+ ) or an aluminum ion (Al 3+ ) or a technetium ion (Tc 3+ ) , So a particularly strong increase in accuracy can be achieved.
- a paramagnetic metal ion preferably a gadolinium ion (Gd 3+ ) or an iron ion (Fe 3+ ) or an aluminum ion (Al 3+ ) or a technetium ion (Tc 3+ )
- a paramagnetic metal ion preferably a gadolinium ion (Gd 3+ ) or an iron ion (Fe 3+ ) or an aluminum ion (Al 3+ ) or a technetium ion (Tc 3+ )
- technetium ions brings a great increase in accuracy, it is disadvantageous
- the contrast agent preferably contains a complex bond.
- a very stable structure of the contrast agent can be achieved.
- a high biocompatibility is achieved.
- the contrast agent includes gadolinium and / or a gadolinium compound and / or Gadolinium diethylenetriamine pentaacetate (Gd-DTPA).
- Gd-DTPA Gadolinium diethylenetriamine pentaacetate
- the polarizing effect of the contrast agent is preferably enhanced or attenuated by an applied magnetic field.
- polarizing effects of the object to be examined can be compensated.
- An inventive method for examining an object uses a microwave transmitter, a
- Microwave receiver a controller and a contrast agent.
- the microwave transmitter and the microwave receiver are controlled by the controller.
- the following steps are performed. - introducing the contrast agent into the object to be examined;
- the object to be examined is preferably a tissue of a patient.
- the contrast agent is preferably injected or swallowed.
- the contrast agent preferably accumulates in certain areas of the tissue.
- the particular areas of the tissue are preferably tumors.
- an external magnetic field is applied.
- the external magnetic field enhances or weakens a polarizing effect of the contrast agent.
- a further increase of the contrast and thus the measurement accuracy is possible.
- the external magnetic field preferably assumes at least two different field strengths in succession during the examination.
- a comparison measurement can be performed. Polarizing effects of the tissue can thus be eliminated.
- Fig. 1 shows an embodiment of the invention
- Fig. 2 is the structural formula of an exemplary
- FIG. 3 shows a flowchart of an exemplary embodiment of the method according to the invention.
- FIG. 1 shows an exemplary embodiment of the measuring device according to the invention.
- a patient 1 lies on a patient support 7.
- electromagnets 8 are arranged below the patient 1, a housing 5 is arranged below the patient 1, a housing 5 is arranged.
- the housing 5 includes a microwave transmitter 2, a microwave receiver 3, an antenna array 6, and a controller 4.
- the microwave transmitter 2 and the microwave receiver 3 are connected to the antenna array 6 and the controller 4, respectively.
- Control device 4 controls the microwave transmitter 2, the microwave receiver 3 and the electromagnets 8.
- the object to be examined is a tissue of the patient 1.
- a contrast agent is first introduced into the object to be examined.
- the contrast agent is introduced by injecting into the tissue or a blood vessel.
- the microwave transmitter 2 sends a microwave signal into the tissue of the patient 1 by means of the antenna array 6.
- the microwave signal is scattered by the tissue and / or the contrast agent.
- a change in the polarization of the microwave signal by the contrast agent can take place.
- the scattered and possibly in its polarization changed microwave signal is received by the microwave receiver 3 by means of the antenna array 6.
- Alignment of the contrast agent in the magnetic field achieved. This alignment changes the polarization properties of the contrast agent.
- the procedure described above is for at least one field strength of the magnetic field repeated. By additional repetitions at different field strengths of the magnetic field, the accuracy can be further increased.
- the control device 4 determines a microwave tomography from the received microwave signals. Since the contrast agent is not distributed homogeneously in the object to be examined, but rather accumulates in certain areas, an improvement in accuracy is achieved, in particular in these areas. In this embodiment, these areas are particularly heavily perfused areas, which suggest the presence of tumors. The detection of other pathologically altered tissue changes is also possible.
- the contrast agent is a substance which has a different conductivity and / or dielectric constant and / or polarization effect compared to the object to be examined, in this case the human tissue.
- biocompatibility is necessary in this embodiment.
- the contrast agent is gadolinium diethylenetriamine pentaacetate (Gd-DTPA). That is, a triply positively charged gadolinium ion (Gd 3+ ) is in a complex bond with Diethylene triamine pentaacetate (DTPA). It is a very stable biocompatible contrast agent. Complex binding of diethylenetriamine pentaacetate (DTPA) with another paramagnetic metal ion is also possible.
- Gd-DTPA gadolinium diethylenetriamine pentaacetate
- DTPA Diethylene triamine pentaacetate
- a first carbon atom is attached to a central nitrogen atom via a single bond.
- two hydrogen atoms and a second carbon atom are bonded.
- Carbon atom is bound by means of a double bond, a first oxygen atom.
- a second oxygen atom is also bound to the second carbon atom by means of a single bond.
- the second oxygen atom thus has a negative charge.
- a third carbon atom is connected to the central nitrogen atom.
- the third carbon atom is linked to two hydrogen atoms and to a fourth carbon atom via a single bond.
- the fourth carbon atom is linked to two hydrogen atoms and to a second nitrogen atom via a single bond.
- the second nitrogen atom is linked to a fifth carbon atom by a single bond.
- the fifth carbon atom is linked to two hydrogen atoms and to a sixth carbon atom by a single bond.
- the sixth carbon atom is linked by a double bond to a third oxygen atom.
- the sixth carbon atom is still connected by a single bond to a fourth oxygen atom.
- the fourth oxygen atom thus has a negative charge.
- the second nitrogen atom is further connected to a seventh carbon atom.
- the seventh carbon atom is connected to two hydrogen atoms and one eighth carbon atom.
- the eighth carbon atom is connected to a fifth oxygen atom by a single bond.
- the fifth oxygen atom is linked to a hydrogen atom.
- the eighth carbon atom is linked to a sixth oxygen atom by means of a double bond.
- the negative charges of the oxygen atoms form a complex bond with a triply positively charged gadolinium ion.
- other triply positively charged paramagnetic ions may be substituted for the gadolinium ion.
- iron ions, aluminum ions or technetium ions can be used.
- technetium is disadvantageous to the extent that technetium is easily radioactive and thus causes a radiation exposure of the object to be examined.
- a first step 30 the contrast agent is introduced into the object to be examined. If, for example, the object to be examined is human tissue, as shown in FIG. 1, the introduction takes place by injecting or orally by swallowing.
- the object to be examined is positioned opposite an antenna. Different places within the object to be examined can thus be examined. Alternatively, different locations within the object to be examined may be examined by using an antenna array as shown in FIG.
- the object to be examined or certain locations within the object to be examined are subjected to microwave signals.
- a microwave signal is scattered by the object to be examined or by the contrast agent and possibly changed in its polarization.
- a fifth step 34 the scattered and possibly changed in its polarization microwave signal is received.
- the optional second step 31 to step 34 is repeated for different locations within the object to be examined.
- a microwave tomography is determined from the received microwave signal or the received microwave signals.
- a further increase in accuracy can be achieved by applying a magnetic field using a corresponding contrast agent. This is shown in more detail with reference to FIG. 1.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008026436 | 2008-06-02 | ||
| DE102008064400A DE102008064400A1 (de) | 2008-06-02 | 2008-12-22 | Mikrowellenuntersuchung mit einem Kontrastmittel |
| PCT/EP2009/003922 WO2009146882A1 (de) | 2008-06-02 | 2009-06-02 | Mikrowellenuntersuchung mit einem kontrastmittel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2280643A1 true EP2280643A1 (de) | 2011-02-09 |
Family
ID=41254114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09757265A Withdrawn EP2280643A1 (de) | 2008-06-02 | 2009-06-02 | Mikrowellenuntersuchung mit einem kontrastmittel |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8938284B2 (de) |
| EP (1) | EP2280643A1 (de) |
| DE (1) | DE102008064400A1 (de) |
| WO (1) | WO2009146882A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008062484A1 (de) * | 2008-06-02 | 2009-12-03 | Rohde & Schwarz Gmbh & Co. Kg | Messvorrichtung und Verfahren zur mikrowellenbasierten Untersuchung |
| GB0920839D0 (en) * | 2009-11-27 | 2010-01-13 | Univ Bristol | Contrast agents for medical imaging |
| WO2012136813A2 (en) * | 2011-04-07 | 2012-10-11 | Universitetet I Oslo | Agents for medical radar diagnosis |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5590654A (en) * | 1993-06-07 | 1997-01-07 | Prince; Martin R. | Method and apparatus for magnetic resonance imaging of arteries using a magnetic resonance contrast agent |
| US20060293586A1 (en) * | 2005-05-19 | 2006-12-28 | Case Western Reserve University | System and method to perform parallel imaging |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719425A (en) * | 1986-04-15 | 1988-01-12 | Scientific Innovations, Inc. | NMR imaging method and apparatus |
| US4684894A (en) * | 1986-05-12 | 1987-08-04 | Diasonics, Inc. | NMR surface coil positioning device |
| GB8817137D0 (en) * | 1988-07-19 | 1988-08-24 | Nycomed As | Compositions |
| GB8819754D0 (en) * | 1988-08-19 | 1988-09-21 | Nycomed As | Apparatus & method |
| US4889942A (en) | 1989-04-12 | 1989-12-26 | Dow Corning Corporation | Process for synthesis of acylamino organosilicon compounds |
| US5030956A (en) * | 1989-04-25 | 1991-07-09 | Murphy Quentin M | Radar tomography |
| US5704355A (en) * | 1994-07-01 | 1998-01-06 | Bridges; Jack E. | Non-invasive system for breast cancer detection |
| DE4433572A1 (de) | 1994-09-07 | 1996-04-04 | Schering Ag | Neue Kontrastmittel für die Röntgen-, Magnetresonanz- und Nukleardiagnostik, deren Herstellung und Verwendung |
| CA2260120A1 (en) * | 1996-07-05 | 1998-01-15 | The Carolinas Heart Institute | Electromagnetic imaging and therapeutic (emit) systems |
| WO2002054088A2 (en) * | 2001-01-05 | 2002-07-11 | Duke University | Contrast enhancement agent for magnetic resonance imaging |
| JP4022474B2 (ja) | 2001-05-03 | 2007-12-19 | リーハイトン エレクトロニクス インコーポレイテツド | シート材料の非破壊的測定およびマッピングのための方法および装置 |
| US20040077943A1 (en) * | 2002-04-05 | 2004-04-22 | Meaney Paul M. | Systems and methods for 3-D data acquisition for microwave imaging |
| US8095204B2 (en) * | 2002-08-09 | 2012-01-10 | Interstitial, Llc | Apparatus and method for diagnosing breast cancer including examination table |
| US7403008B2 (en) * | 2004-08-02 | 2008-07-22 | Cornell Research Foundation, Inc. | Electron spin resonance microscope for imaging with micron resolution |
| WO2006116021A2 (en) * | 2005-04-22 | 2006-11-02 | Intematix Corporation | Mri technique based on electron spin resonance and endohedral contrast agent |
-
2008
- 2008-12-22 DE DE102008064400A patent/DE102008064400A1/de not_active Withdrawn
-
2009
- 2009-06-02 WO PCT/EP2009/003922 patent/WO2009146882A1/de not_active Ceased
- 2009-06-02 EP EP09757265A patent/EP2280643A1/de not_active Withdrawn
- 2009-06-02 US US12/995,965 patent/US8938284B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5590654A (en) * | 1993-06-07 | 1997-01-07 | Prince; Martin R. | Method and apparatus for magnetic resonance imaging of arteries using a magnetic resonance contrast agent |
| US20060293586A1 (en) * | 2005-05-19 | 2006-12-28 | Case Western Reserve University | System and method to perform parallel imaging |
Non-Patent Citations (3)
| Title |
|---|
| RUMYANTSEVA G V ET AL: "Trace transition metal-catalyzed reactions in the microsomal metabolism of alkyl hydrazines to carbon-centered free radicals.", THE JOURNAL OF BIOLOGICAL CHEMISTRY 15 NOV 1991, vol. 266, no. 32, 15 November 1991 (1991-11-15), pages 21422 - 21427, ISSN: 0021-9258 * |
| RUNGE V M ET AL: "Gd DTPA: a review of clinical indications in central nervous system magnetic resonance imaging.", RADIOGRAPHICS : A REVIEW PUBLICATION OF THE RADIOLOGICAL SOCIETY OF NORTH AMERICA, INC SEP 1989, vol. 9, no. 5, September 1989 (1989-09-01), pages 929 - 958, XP008161763, ISSN: 0271-5333 * |
| See also references of WO2009146882A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009146882A1 (de) | 2009-12-10 |
| US8938284B2 (en) | 2015-01-20 |
| US20110160579A1 (en) | 2011-06-30 |
| DE102008064400A1 (de) | 2009-12-03 |
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