Yazar "Tekeş, Coşkun" için listeleme
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An Analog beamformer for integrated high-frequency medical ultrasound imaging
Gürün, Gökçe; Zahorian, Jaime; Tekeş, Coşkun; Karaman, Mustafa; Hasler, Paul E.; Değertekin, Fahrettin Levent (IEEE, 2011)We designed and fabricated a dynamic receive beamforming integrated circuit (IC) in 0.35-mu m CMOS technology. This beamformer is suitable for integration with an ultrasound annular array for high-frequency (30-50 MHz) ... -
CMUT-based volumetric ultrasonic imaging array design for forward looking ICE and IVUS applications
Tekeş, Coşkun; Zahorian, Jaime S.; Xu, Toby; Rashid, Muhammad Wasequr; Satır, Sarp; Gürün, Gökçe; Karaman, Mustafa; Hasler, Jennifer Olson; Değertekin, Fahrettin Levent (SPIE-Int Soc Optical Engineering, 2013)Designing a mechanically flexible catheter based volumetric ultrasonic imaging device for intravascular and intracardiac imaging is challenging due to small transducer area and limited number of cables. With a few parallel ... -
Co-array optimization of CMUT arrays for forward-looking IVUS
Tekeş, Coşkun; Karaman, Mustafa; Değertekin, Fahrettin Levent (IEEE, 2009-09)The ring annular array structure is a preferred configuration for implementing Forward-Looking IVUS (FLIVUS) catheters as it allows for volumetric imaging as well as use of a guidewire at the center. CMUT technology is ... -
Damar içi öne bakan ultrasonik görüntüleme için eşdeğer dizi örnekleme yöntemleri
Tekeş, Coşkun; Karaman, Mustafa (IEEE, 2009-06-26)Damar içi öne bakan ultrasonik görüntüleme gerçek zamanlı hacimsel (üç boyutlu) görüntülemeye imkan vermesi bakımından yaygın olarak kullanılmaktadır. Damar içi görüntülemede fiziksel boyutların küçük olması nedeniyle ... -
Dual-annular-ring CMUT array for forward-looking IVUS imaging
Güldiken, Rasim Oytun; Zahorian, Jaime; Balantekin, Müjdat; Değertekin, Fahrettin Levent; Tekeş, Coşkun; Şişman, Alper; Karaman, Mustafa (IEEE, 2006)We investigate a dual-annular-ring CMUT array configuration for forward-looking intravascular ultrasound (FL-IVUS) imaging. The array consists of separate, concentric transmit and receive ring arrays built on the same ... -
Experimental study of dual-ring CMUT array optimization for forward-looking IVUS
Tekeş, Coşkun; Zahorian, Jaime; Gürün, Gökçe; Satir, Sarp; Hochman, Michael; Xu, Toby; Rashid, Muhammad Wasequr; Değertekin, Fahrettin Levent; Karaman, Mustafa (IEEE, 2011)Forward-looking (FL) catheters have guiding and volumetric imaging capacities which are highly desirable for IVUS applications. Large channel and firing counts have to be reduced to enable 3-D real-time imaging and simplify ... -
Forward-looking IVUS imaging using a dual-annular ring CMUT array: Experimental results
Güldiken, Rasim Oytun; Zahorian, Jaime S.; Gürün, Gökçe; Qureshi, Muhammad Shakeel; Balantekin, Müjdat; Tekeş, Coşkun; Hasler, Paul E.; Karaman, Mustafa; Carlier, Stephane; Değertekin, Fahrettin Levent (IEEE, 2007)This paper presents the experimental results on forward-looking Intravascular ultrasound (FL-IVUS) using dual-annular-ring CMUT arrays. The array has a diameter of 1mm including bondpads which consists of separate, concentric ... -
Implementation of a fixed cellular terminal with mobile phone
Tekeş, Coşkun (Işık Üniversitesi, 2002-09)The thesis reports the design and realization of a fixed cellular terminal (FCT) device which works with a mobile phone as a GSM Module. The design is emphasized at the structure not to be complex and suitable to be used ... -
Optimizing circular ring arrays for forward-looking IVUS imaging
Tekeş, Coşkun; Karaman, Mustafa; Değertekin, Fahrettin Levent (IEEE-Inst Electrical Electronics Engineers Inc, 2011-12)Forward-looking (FL) catheter-based imaging systems are highly desirable for guiding interventions in intravascular ultrasound (IVUS) applications. One of the main challenges of array-based FL-IVUS systems is the large ... -
Ring array processing for forward-looking intravascular and intracardiac ultrasonic imaging
Tekeş, Coşkun (Işık Üniversitesi, 2010-06-08)Forward-looking (FL) catheter-based imaging systems are highly desirable for guiding interventions in IVUS and ICE applications. One of the main challenges in the array based FLIVUS systems is the large channel count which ... -
Simulated annealing based optimization of dual-ring arrays for forward-looking IVUS and ICE imaging
Forward-Looking (FL) catheter based imaging systems are highly desirable for guiding interventions in intravascular ultrasound (IVUS) and intracardiac echocardiography (ICE) applications. One of the main challenges in the ... -
Tıbbi ultrasonik kanal içi görüntüleme için yeni yöntemler
Karaman, Mustafa; Şişman, Alper; Tekeş, Coşkun (Tübitak, 2008-09)Yakın zamanda yapılan çalışmalarımızdaki yaklaşımda, aktif kanal sayısını azaltmak için fazlalık (redundant) gönderme-alma eleman ikilileri azalırken gerekli olan (non-redundant) gönderme-alma eleman ikilileri korunmaktadır. ...