Patents by Inventor Holger Gruell
Holger Gruell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20210186588Abstract: The invention provides for a medical system (100, 300, 400, 500) comprising: a memory (110) for storing machine executable instructions (150) and a processor (104) for controlling the medical system.Type: ApplicationFiled: March 16, 2018Publication date: June 24, 2021Inventors: ULRICH KATSCHER, JOCHEN KEUPP, HOLGER GRUELL, EDWIN HEIJMAN, SIN YUIN YEO
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Patent number: 9795693Abstract: Described are drug carriers useful in magnetic resonance imaging (MRI)-guided drug release comprising a shell capable of releasing an enclosed biologically active agent as a result of a local stimulus, e.g. energy input, such as heat, wherein the shell encloses a 19F MR contrast agent. Preferably, the carrier also acts as a contrast enhancement agent for MRI based on the principle of Chemical Exchange-dependent Saturation Transfer (CEST). To this end the shell encloses a cavity that comprises a paramagnetic chemical shift reagent, a pool of proton analytes, and the 19F contrast agent, and wherein the shell allows diffusion of the proton analytes.Type: GrantFiled: September 3, 2009Date of Patent: October 24, 2017Assignee: Koninklijke Philips N.V.Inventors: Sander Langereis, Jochen Keupp, Holger Gruell, Dirk Burdinski, Danielle Beelen
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Patent number: 9718929Abstract: Described are amphiphilic polymers that are provided with chelating moieties. The amphiphilic polymers are block copolymers comprising a hydrophilic block and a hydrophobic block, with the chelating moieties linked to the end-group of the hydrophilic block. The disclosed polymers are capable of self-assembly into structures such as micelles and polymersomes. With suitable metals present in the form of coordination complexes with the chelating moieties, the chelating amphiphilic polymers of the invention are suitable for use in various imaging techniques requiring metal labeling, such as MRI (T1/T2 weighted contrast agents or CEST contrast agents) SPECT, PET or Spectral CT.Type: GrantFiled: May 15, 2015Date of Patent: August 1, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Holger Gruell, Anke De Vries, Sander Langereis, Johan Lub, Erica Maria Gerarda Aussems-Custers
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Patent number: 9642802Abstract: Disclosed are carriers for drugs and/or MR imaging agents having a lipid bilayer shell comprising a phospholipid having two terminal alkyl chains, one being a short chain having a chain length of at most seven carbon atoms, the other being a long chain having a chain length of at least fifteen carbon atoms. The mixed long/short chain phospholipids serve to tune the release properties of the carrier. Preferred phospholipids are phosphatidylcholines.Type: GrantFiled: July 8, 2011Date of Patent: May 9, 2017Assignee: Koninklijke Philips N.V.Inventors: Sander Langereis, Holger Gruell, Mariska De Smet, Erica Maria Gerarda Aussems-Custers, Johan Lub
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Publication number: 20150247008Abstract: Described are amphiphilic polymers that are provided with chelating moieties. The amphiphilic polymers are block copolymers comprising a hydrophilic block and a hydrophobic block, with the chelating moieties linked to the end-group of the hydrophilic block. The disclosed polymers are capable of self-assembly into structures such as micelles and polymersomes. With suitable metals present in the form of coordination complexes with the chelating moieties, the chelating amphiphilic polymers of the invention are suitable for use in various imaging techniques requiring metal labeling, such as MRI (T1/T2 weighted contrast agents or CEST contrast agents) SPECT, PET or Spectral CT.Type: ApplicationFiled: May 15, 2015Publication date: September 3, 2015Inventors: HOLGER GRUELL, ANKE DE VRIES, SANDER LANGEREIS, JOHAN LUB, ERICA MARIA GERARDA AUSSEMS-CUSTERS
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Patent number: 9061062Abstract: Disclosed are lipidomimetic compounds of formula I (I) wherein: G represents a group satisfying formula II: HO—CH2—{CH(OH)—CH2-0}m-CH2—{C(=0)-0-CH2})q— formula II each n independently is an integer from 1-30; m is an integer from 1-10; q is 0 or 1. These compounds can be added to the lipid bilayer of thermosensitive liposomes, for the purpose of aiding in the prevention of leakage of the liposomes' contents at 37° C., and retarding clearance from circulation.Type: GrantFiled: June 6, 2012Date of Patent: June 23, 2015Assignee: Koninklijke Philips N.V.Inventors: Holger Gruell, Sander Langereis, Johan Lub
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Publication number: 20150147273Abstract: A method for determining whether compound 0118 is a candidate treatment for a patient includes processing, via a processor, image data of tissue of interest of a patient including a cancer to determine whether a radiolabeled analog of compound 0118 is present in the tissue of interest represented in the image data and generating a signal indicating that compound 0118 is a candidate treatment for the patient in response to the determining that the radiolabeled analog of compound 0118 is present in a predetermined amount in the tissue of interest represented in the image data, wherein the presence of the radiolabeled analog of compound 0118 in the tissue of interest indicates presence of a sub-type of cancer having a galectin-1 molecular target, which is a sub-type of treatable by compound 0118.Type: ApplicationFiled: June 10, 2013Publication date: May 28, 2015Applicant: Koninklijke Philips N.V.Inventors: Tilman Lappchen, Holger Gruell, Marc Stefan Robillard, Johan Lub
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Patent number: 9034298Abstract: Described are amphiphilic polymers that are provided with chelating moieties. The amphiphilic polymers are block copolymers comprising a hydrophilic block and a hydrophobic block, with the chelating moieties linked to the end-group of the hydrophilic block. The disclosed polymers are capable of self-assembly into structures such as micelles and polymersomes. With suitable metals present in the form of coordination complexes with 5 the chelating moieties, the chelating amphiphilic polymers of the invention are suitable for use in various imaging techniques requiring metal labeling, such as MRI (T 1/T 2 weighted contrast agents or CEST contrast agents) SPECT, PET or Spectral CT.Type: GrantFiled: September 8, 2009Date of Patent: May 19, 2015Assignee: Koninklijke Philips N.V.Inventors: Holger Gruell, Anke De Vries, Sander Langereis, Johan Lub, Erica M. G. Aussems-Custers
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Patent number: 8734761Abstract: The invention provides MRI contrast agents which provide a high sensitivity and which have an optimised body retention time. These agents enable the mapping of the local pH, temperature, oxygen concentration or other metabolites in a patient's body by the use of Chemical Exchange Saturation Transfer (CEST). Particularly pH and temperature mapping are useful for the detection of small cancer lesions and localized inflammation respectively.Type: GrantFiled: April 21, 2006Date of Patent: May 27, 2014Assignee: Koninklijke Philips N.V.Inventors: Nicolaas Petrus Willard, Rene Theodorus Wegh, Jeroen Alphons Pikkemaat, Holger Gruell
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Publication number: 20140127135Abstract: Disclosed are lipidomimetic compounds of formula I (I) wherein: G represents a group satisfying formula II: HO—CH2—{CH(OH)—CH2-0}m-CH2—{C(=0)-0-CH2})q— formula II each n independently is an integer from 1-30; m is an integer from 1-10; q is 0 or 1. These compounds can be added to the lipid bilayer of thermosensitive liposomes, for the purpose of aiding in the prevention of leakage of the liposomes' contents at 37° C., and retarding clearance from circulation.Type: ApplicationFiled: June 6, 2012Publication date: May 8, 2014Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Holger Gruell, Sander Langereis, Johan Lub
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Publication number: 20130302253Abstract: Disclosed is a carrier for the local, targeted administration of a hydrophobic drug. The hydrophobic drug is rendered in to a hydrophilic prodrug thereof, and is contained in the lumen of a thermosensitive liposome or polymersome. Upon administration of the carrier, heat can be applied at the locus where the drug is to be released. After release of the prodrug, it will be activated so as to turn into the active drug.Type: ApplicationFiled: January 25, 2012Publication date: November 14, 2013Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Holger Gruell, Sander Langereis, Charles Sio
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Patent number: 8463358Abstract: A method for MRI imaging to obtain information about a local physiochemical parameter after administration to a patient of a contrast agent including at least one non-responsive contrast enhancing entity that does not occur naturally in a human body and at least one responsive contrast enhancing entity attached to or mixed with the non-responsive contrast enhancing entity. By using such non-responsive contrast enhancing entities, a value for the physicochemical parameter can be obtained by acquiring only three images, providing a method which will be easier to apply in a clinical routine, since it will be faster and less sensitive to motion or flow artifacts.Type: GrantFiled: June 8, 2007Date of Patent: June 11, 2013Assignee: Koninklijke Philips Electronics N.V.Inventors: Rudolf Mathias Johannes Nicolaas Lamerichs, Rene Theodorus Wegh, Jeroen Alphons Pikkemaat, Holger Gruell
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Publication number: 20130108551Abstract: Disclosed are carriers for drugs and/or MR imaging agents having a lipid bilayer shell comprising a phospholipid having two terminal alkyl chains, one being a short chain having a chain length of at most seven carbon atoms, the other being a long chain having a chain length of at least fifteen carbon atoms. The mixed long/short chain phospholipids serve to tune the release properties of the carrier. Preferred phospholipids are phosphatidylcholines.Type: ApplicationFiled: July 8, 2011Publication date: May 2, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Sander Langereis, Holger Gruell, Mariska De Smet, Erica Maria Gerarda Aussems-Custers, Johan Lub
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Patent number: 8306603Abstract: The present invention provides a method MRI imaging. By applying a time modulation to the contrast enhancement of an MRI contrast agent, the method according to the invention leads to images with improved signal-to-noise ratio in the contrast-enhanced areas, strongly suppressed unwanted signal in the unenhanced areas, and reduced artefacts, such as motion artefacts.Type: GrantFiled: April 25, 2006Date of Patent: November 6, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Nicolaas Petrus Willard, Rene Theodorus Wegh, Jeroen Alphons Pikkemaat, Holger Gruell, Tobias Schaeffter, Rudolf Mathias Johannes Nicolaas Lamerichs
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Publication number: 20120128589Abstract: Described is the use of perfluoro-t-butyl cyclohexane in a contrast agent for molecular imaging, notably F MRI. Particularly, the perfluoro-t-butyl cyclohexane is present in the form of an aqueous emulsion of nanoparticles comprising the perfluoro compound as a core, and an emulsifying agent, such as a phospholipid, as a shell. The shell can be functionalized with other moieties that play a role in imaging, notably ligands for targeted binding and/or contrast agents or labels with a view to other imaging modalities. The latter particularly refers to 1H MRI contrast agents as well as radiolabels for SPECT.Type: ApplicationFiled: July 21, 2010Publication date: May 24, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Muhammed Yildirim, Holger Gruell, Rudolf Mathias Johannes Nicolaas Lamerichs
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Publication number: 20120100079Abstract: The present invention relates to a composition comprising a shell structure forming a cavity, wherein said shell structure comprises a drug and wherein said composition is associated with at least one contrast agent; wherein said shell structure is capable of releasing its contents into the exterior upon the application of an external stimulus and wherein said contrast agent comprises magnetic particles which are capable of being detected by Magnetic Particle Imaging (MPI), wherein at least more than 5% (w/w) of the magnetic particles comprised in said contrast agent have a magnetic moment of at least ?18 m 2 A, 10 wherein said magnetic particles are preferably composed of Fe, Co, Ni, Zn or Mn or alloys thereof or oxides of any of these.Type: ApplicationFiled: June 25, 2010Publication date: April 26, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Dirk Burdinski, Jeroen A. Pikkemaat, Bertrand Schmitt, Holger Gruell, Sander Langereis
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Publication number: 20110288402Abstract: The invention relates to a method of MR imaging of at least a portion of a body of a patient placed in an examination volume of an MR device. The object of the invention is to improve CEST contrast enhanced imaging. The method of the invention comprises the following steps: a) saturation of nuclear magnetization of exchangeable protons of a CEST contrast agent administered to the patient by subjecting the portion of the body to at least one frequency-selective saturation RF pulse matched to the MR frequency of exchangeable protons of the CEST contrast agent, wherein the saturation period, i.e.Type: ApplicationFiled: December 15, 2009Publication date: November 24, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Jeroen Alphons Pikkemaat, Sander Langereis, Holger Gruell, Dirk Burdinski, Rudolf Mathias Johannes Nicolaas Lamerichs, Jochen Keupp
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Publication number: 20110182821Abstract: The invention provides a magnetic tracer material for use in magnetic particle imaging and a manufacturing method thereof. The magnetic tracer material comprises clusters of a plurality of magnetic particles that are clustered in a controlled way to form individual entities, for example, stabilized oil droplets, solid emulsion particles, liposomes, polymersomes or vesicles, or naturally occurring biological entities such as cells or viruses.Type: ApplicationFiled: August 28, 2008Publication date: July 28, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Holger Gruell, Hans Marc Bert Boeve, Denis Markov
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Publication number: 20110177009Abstract: Described are drug carriers useful in magnetic resonance imaging (MRI)-guided drug release comprising a shell capable of releasing an enclosed biologically active agent as a result of a local stimulus, e.g. energy input, such as heat, wherein the shell encloses a 19F MR contrast agent. Preferably, the carrier also acts as a contrast enhancement agent for MRI based on the principle of Chemical Exchange-dependent Saturation Transfer (CEST). To this end the shell encloses a cavity that comprises a paramagnetic chemical shift reagent, a pool of proton analytes, and the 19F contrast agent, and wherein the shell allows diffusion of the proton analytes.Type: ApplicationFiled: September 3, 2009Publication date: July 21, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Sander Langereis, Jochen Keupp, Holger Gruell, Dirk Burdinski, Danielle Beelen
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Publication number: 20110165074Abstract: Described are amphiphilic polymers that are provided with chelating moieties. The amphiphilic polymers are block copolymers comprising a hydrophilic block and a hydrophobic block, with the chelating moieties linked to the end-group of the hydrophilic block. The disclosed polymers are capable of self-assembly into structures such as micelles and polymersomes. With suitable metals present in the form of coordination complexes with 5 the chelating moieties, the chelating amphiphilic polymers of the invention are suitable for use in various imaging techniques requiring metal labeling, such as MRI (T 1/T 2 weighted contrast agents or CEST contrast agents) SPECT, PET or Spectral CT.Type: ApplicationFiled: September 8, 2009Publication date: July 7, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Holger Gruell, Anke De Vries, Sander Langereis, Johan Lub, Erica M.G. Aussems-Custers