Yazar "Karaman, Mustafa" için MF - Bildiri Koleksiyonu | Elektrik-Elektronik Mühendisliği Bölümü / Department of Electrical-Electronics Engineering listeleme
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Micromachined capacitive transducer arrays for intravascular ultrasound
Değertekin, Fahrettin Levent; Güldiken, Rasim Oytun; Karaman, Mustafa (SPIE, 2005)Intravascular ultrasound (IVUS) imaging has become an essential imaging modality for the effective diagnosis and treatment of cardiovascular diseases during the past decade enabled by innovative applications of piezoelectric ... -
A miniature real-time volumetric ultrasound imaging system
Wygant, Ira O.; Yeh, David T.; Zhuang, Xuefeng; Nikoozadeh, Amin; Oralkan, Ömer; Ergün, Arif Sanlı; Karaman, Mustafa; Khuri-Yakub, Butrus Thomas (SPIE-Int Soc Optical Engineering, 2005)Progress made in the development of a miniature real-time volumetric ultrasound imaging system is presented. This system is targeted for use in a 5-mm endoscopic channel and will provide real-time, 30-mm deep, volumetric ... -
Multiple annular ring capacitive micromachined ultrasonic transducer arrays for forward-looking intravascular ultrasound imaging catheters
Güldiken, Rasim Oytun; Zahorian, Jaime S.; Balantekin, Müjdat; Karaman, Mustafa; Değertekin, Fahrettin Levent (American Society of Mechanical Engineers (ASME), 2007)We investigate multiple-annular-ring CMUT array configuration for forward-looking intravascular ultrasound (FL-IVUS) imaging. This configuration has the potential for independent optimization of each ring and uses the ... -
Phased subarray imaging for low-cost, wideband coherent array imaging
Johnson, Jeremy A.; Oralkan, Ömer; Ergün, Arif Sanlı; Demirci, Utkan; Karaman, Mustafa; Khuri-Yakub, Butrus Thomas (IEEE, 2003)The front-end hardware complexity of conventional full phased array (FPA) imaging is proportional to the number of array elements. Phased subarray (PSA) imaging has been proposed as a method of reducing the hardware ... -
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 ... -
Solid-state SL-IVUS arrays based on non-uniform aperture sampling
Şişman, Alper; Karaman, Mustafa; Gürün, Gökçe; Değertekin, Fahrettin Levent (IEEE, 2010)We propose new reconfigurable ring and cylindrical array designs using non-uniform (Fresnel) aperture sampling with identical differential delays between adjacent elements which reduces the beamformer complexity. For ... -
Subarray delta-sigma beamforming for ultrasonic imaging
Bilge, Hasan Şakir; Karaman, Mustafa (IEEE, 2002)We present a beamforming architecture based on subarray processing with non-uniform oversampling 1-bit delta-sigma (??) modulation. The subarray processing combines conventional phased array and synthetic aperture approaches ... -
A tunable analog delay element for high-frequency dynamic beamforming
Gürün, Gökçe; Şişman, Alper; Zahorian, Jaime S.; Satır, Sarp; Karaman, Mustafa; Hasler, Paul E.; Değertekin, Fahrettin Levent (IEEE, 2009)Implementing beamforming for high frequency arrays is challenging because of the accurate delay requirements at high frequencies. High frequency digital beamforming is not suitable for catheter based applications as a large ... -
Üç boyutlu akustik görüntüleme için ön alıcı-verici tümdevre
Çiçek, İhsan; Bozkurt, Ayhan; Karaman, Mustafa (IEEE, 2004)Tıbbi ultrasonik görüntüleme sistemleri, genel olarak bir çevirici elemanı ve akustik işaretin üretilip algılanmasından sorumlu elektronik oluşmaktadır. Tek boyutlu dönüştürücü dizileriyle, incelenmekte olan ortamın iki ... -
Volumetric imaging using 2D capacitive micromachined ultrasonic transducer arrays (CMUTs): Initial results
Oralkan, Ömer; Ergün, Arif Sanlı; Cheng, Ching-Hsiang; Johnson, Jeremy A.; Karaman, Mustafa; Lee, Thomas H.; Khuri-Yakub, Butrus Thomas (IEEE, 2002)This paper presents the first volumetric images obtained using a 2D CMUT array with through-wafer via interconnects. An 8×16-element portion of a 32×64-element array flip-chip bonded onto a glass fanout chip was used in ... -
Volumetric imaging using fan-beam scanning with reduced redundancy 2D arrays
Wygant, Ira; Karaman, Mustafa; Oralkan, Ömer; Khuri-Yakub, Butrus Thomas (IEEE, 2006)Phased array processing with a fully populated 2D array produces the best image quality but requires excessive number of active parallel front-end channels. Here we explore four array designs with reduced redundancy in ...