Patents by Inventor Khalid Shahzad
Khalid Shahzad 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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Patent number: 9743881Abstract: Functional imaging for localization in biological tissue entails measuring a response in the tissue (240) to electromagnetic radiation. A catheter (200) for real-time monitoring of cardiac ablation is employed to distinguish a hemorrhage zone (232) from the sandwiching necrotic and healthy tissue, or to distinguish exogenous photoacoustic contrast agent from bordering native tissue. A pair of wavelengths is selected for differential absorption (244) of the radiation in, correspondingly, the hemorrhage zone or where the contrast agent exists, and relatively similar absorption elsewhere. Near infrared laser or LED light may be used photoacoustically to serially acquire (S310, S320) the two datasets to be compared, each representative of a time waveform. Alternatively, acquisition is for a pair of wavelength bands of microwave-induced thermoacoustic data.Type: GrantFiled: March 27, 2012Date of Patent: August 29, 2017Assignee: Koninklijke Philips N.V.Inventors: Emil Radulescu, Sheng-Wen Huang, Ramon Erkamp, Ladislav Jankovic, Yan Shi, Khalid Shahzad
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Publication number: 20140088418Abstract: Functional imaging for localization in biological tissue entails measuring a response in the tissue (240) to electromagnetic radiation. A catheter (200) for real-time monitoring of cardiac ablation is employed to distinguish a hemorrhage zone (232) from the sandwiching necrotic and healthy tissue, or to distinguish exogenous photoacoustic contrast agent from bordering native tissue. A pair of wavelengths is selected for differential absorption (244) of the radiation in, correspondingly, the hemorrhage zone or where the contrast agent exists, and relatively similar absorption elsewhere. Near infrared laser or LED light may be used photoacoustically to serially acquire (S310, S320) the two datasets to be compared, each representative of a time waveform. Alternatively, acquisition is for a pair of wavelength bands of microwave-induced thermoacoustic data.Type: ApplicationFiled: March 27, 2012Publication date: March 27, 2014Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Emil Radulescu, Sheng-Wen Huang, Ramon Erkamp, Ladislav Jankovic, Yan Shi, Khalid Shahzad
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Patent number: 8677829Abstract: Apparatus, systems and methods are provided for production and integration of compact illumination schemes. More particularly, disclosed embodiments relate to apparatus/systems and methods for production of highly compact illumination schemes, whereby photoacoustic waves are induced in a target sample. Additionally, the disclosed apparatus/systems and methods are effective to produce compact and portable integrated transducer-illumination arrays. Apparatus disclosed generally include at least one lighting source and a beamsplitting assembly. Systems disclosed generally include one or more apparatus for the production of compact lighting schemes, an ultrasonic transducer assembly and means for coupling the one or more apparatus and US transducer assembly with a target sample.Type: GrantFiled: October 13, 2008Date of Patent: March 25, 2014Assignee: Koninklijke Philips N.V.Inventors: Khalid Shahzad, Ladislav Jankovic
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Patent number: 8617148Abstract: A tissue ablation device employs one or more energy emitters (21) and one or more photoacoustic sensors (22) in a cooperative arrangement for applying a tissue ablation therapy to a tissue (60). In operation, the energy emitters (21) emit a tissue ablation beam (TA) into a target portion of the tissue (60) to form a lesion (61) therein, and alternatively or concurrently emit a photoexcitation beam (PE) into the target portion of the tissue (60) to excite a photoacoustic response from the tissue (60). The photoacoustic sensor(s) (22) sense the photoacoustic response of the tissue (60).Type: GrantFiled: December 15, 2008Date of Patent: December 31, 2013Assignee: Koninklijke Philips N.V.Inventors: Robert Manzke, Raymond Chan, Ladislav Jankovic, Daniel R. Elgort, Khalid Shahzad
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Publication number: 20120086789Abstract: An imaging system for imaging a viscoelastic medium is disclosed. The imaging system comprises a variable refractive lens (4) and a transducer system (5) for generating acoustic radiation. The imaging system is operated to alternate between first and second operating modes. While the variable refractive lens is operated to alternate between a first configuration and a second configuration, the transducer is operated to alternate between generating acoustic radiation for displacing the viscoelastic medium and acoustic radiation for imaging the displacement of the viscoelastic medium. In embodiments the variable refractive lens is a fluid focus lens. Moreover, in embodiments, the imaging system is integrated with a catheter-based interaction modality, such as a tissue ablation modality.Type: ApplicationFiled: June 15, 2010Publication date: April 12, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Khalid Shahzad, Ajay Anand, John Petruzzello, Shiwei Zhou, Jan Frederik Suijver
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Publication number: 20100280504Abstract: A tissue ablation device employs one or more energy emitters (21) and one or more photoacoustic sensors (22) in a cooperative arrangement for applying a tissue ablation therapy to a tissue (60). In operation, the energy emitters (21) emit a tissue ablation beam (TA) into a target portion of the tissue (60) to form a lesion (61) therein, and alternatively or concurrently emit a photoexcitation beam (PE) into the target portion of the tissue (60) to excite a photoacoustic response from the tissue (60). The photoacoustic sensor(s) (22) sense the photoacoustic response of the tissue (60).Type: ApplicationFiled: December 15, 2008Publication date: November 4, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Robert Manzke, Raymond Chan, Ladislav Jankovic, Daniel R. Elgort, Khalid Shahzad
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Publication number: 20100229650Abstract: Apparatus, systems and methods are provided for production and integration of compact illumination schemes. More particularly, disclosed embodiments relate to apparatus/systems and methods for production of highly compact illumination schemes, whereby photoacoustic waves are induced in a target sample. Additionally, the disclosed apparatus/systems and methods are effective to produce compact and portable integrated transducer-illumination arrays. Apparatus disclosed generally include at least one lighting source and a beamsplitting assembly. Systems disclosed generally include one or more apparatus for the production of compact lighting schemes, an ultrasonic transducer assembly and means for coupling the one or more apparatus and US transducer assembly with a target sample.Type: ApplicationFiled: October 13, 2008Publication date: September 16, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Khalid Shahzad, Ladislav Jankovic
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Patent number: 6686975Abstract: An apparatus for improved contrast in projection optical systems consists of a polarizing beam splitter (PBS) in combination with two or more waveplates whose fast exes are aligned perpendicular to each other. The apparatus has an effective broadband frequency response that is better than that of the individual retarders acting alone, and through the selection of a birefringence factor and thickness of the individual retarders, wavelength dependencies are minimized.Type: GrantFiled: May 10, 2001Date of Patent: February 3, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Duncan J. Anderson, Khalid Shahzad
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Patent number: 6669343Abstract: An image display system utilizes primarily non-absorptive polarization components to polarize light illuminating an imaging device. The non-absorptive polarization components reduce cost and cooling requirements, increase durability, and permit the use of high powered light sources.Type: GrantFiled: May 31, 2001Date of Patent: December 30, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Khalid Shahzad, Jeffrey A. Shimizu
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Publication number: 20020191154Abstract: An image display system utilizes primarily non-absorptive polarization components to polarize light illuminating an imaging device. The non-absorptive polarization components reduce cost and cooling requirements, increase durability, and permit the use of high powered light sources.Type: ApplicationFiled: May 31, 2001Publication date: December 19, 2002Applicant: Philips Electronics North America CorporationInventors: Khalid Shahzad, Jeffrey A. Shimizu
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Publication number: 20020167620Abstract: An apparatus for improved contrast in projection optical systems consists of a polarizing beam splitter (PBS) in combination with two or more waveplates whose fast exes are aligned perpendicular to each other. The apparatus has an effective broadband frequency response that is better than that of the individual retarders acting alone, and through the selection of a birefringence factor and thickness of the individual retarders, wavelength dependencies are minimized.Type: ApplicationFiled: May 10, 2001Publication date: November 14, 2002Applicant: Koninklijke Philips Electronics N.V.Inventors: Duncan J. Anderson, Khalid Shahzad
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Patent number: 6469834Abstract: An optical illumination apparatus includes an illumination source, a pair of spaced integrator plates each having a plurality of lenslets, a conduit array, having a respective aperture corresponding to a plurality of the lenslets disposed there between, with non-reflective optically absorptive walls, and a relay optical structure for integrating light emitted from said second array of lenslets on a focal plane.Type: GrantFiled: November 16, 2000Date of Patent: October 22, 2002Assignee: Koninklijke Philips Electronics N.V.Inventors: Khalid Shahzad, Jeffrey A. Shimizu, John Domm