Search results for: Deep Bera

Items from 1 to 11 out of 11 results

article

Fast Volumetric Imaging Using a Matrix Transesophageal Echocardiography Probe with Partitioned Transmit–Receive Array

Deep Bera, Franc van den Adel, Nikola Radeljic-Jakic, Boris Lippe, more

Ultrasound in Medicine & Biology > 2018 > 44 > 9 > 2025-2042

We describe a 3-D multiline parallel beamforming scheme for real-time volumetric ultrasound imaging using a prototype matrix transesophageal echocardiography probe with diagonally diced elements and separated transmit and receive arrays. The elements in the smaller rectangular transmit array are directly wired to the ultrasound system. The elements of the larger square receive aperture are grouped...

chapter

A front-end ASIC for miniature 3-D ultrasound probes with in-probe receive digitization

Chao Chen, Zhao Chen, Deep Bera, Emile Noothout, more

2017 IEEE International Ultrasonics Symposium (IUS) > 1

2017 IEEE International Ultrasonics Symposium (IUS)

Data acquisition from 2-D transducer arrays has become one of the main challenges for the development of endoscopic and catheter-based 3-D ultrasound imaging devices. Front-end ASICs with sub-array pre-beamforming have been reported that reduce the cable number by an order of magnitude. Further channel reduction requires digitization in the front-end ASIC to facilitate more in-probe data processing...

chapter

Volumetric imaging using adult matrix TEE with separated transmit and receive array

Deep Bera, Franc van den Adel, Nikola Radeljic-Jakic, Boris Lippe, more

2017 IEEE International Ultrasonics Symposium (IUS) > 1

2017 IEEE International Ultrasonics Symposium (IUS)

The design of 3D TEE transducers poses severe technical challenges: channel count, electronics integration with high and low voltages, heat dissipation, etc. We present an adult matrix TEE probe with separate transmit (Tx) and receive (Rx) arrays allowing optimization in both Tx and Rx [1]. Tx elements are directly wired out, Rx employs integrated micro-beamformers in low-voltage (1.8/5.0V) chip technology...

chapter

A front-end ASIC for miniature 3-D ultrasound probes with in-probe receive digitization

Chao Chen, Zhao Chen, Deep Bera, Emile Noothout, more

2017 IEEE International Ultrasonics Symposium (IUS) > 1 - 4

2017 IEEE International Ultrasonics Symposium (IUS)

This paper presents a front-end application-specific integrated circuit (ASIC) that demonstrates the feasibility of inprobe digitization for next-generation miniature 3-D ultrasound probes with acceptable power- and area-efficiency. The proposed design employs a low-power charge-domain ADC that is directly merged with the sample-and-hold delay lines in each subarray, and high-speed datalinks at the...

article

A Front-End ASIC With Receive Sub-array Beamforming Integrated With a $32 \times 32$ PZT Matrix Transducer for 3-D Transesophageal Echocardiography

Chao Chen, Zhao Chen, Deep Bera, Shreyas B. Raghunathan, more

IEEE Journal of Solid-State Circuits > 2017 > 52 > 4 > 994 - 1006

This paper presents a power- and area-efficient front-end application-specific integrated circuit (ASIC) that is directly integrated with an array of

$32 \times 32$

piezoelectric transducer elements to enable next-generation miniature ultrasound probes for real-time 3-D transesophageal echocardiography. The

$6.1 \times 6.1$

mm² ASIC, implemented in a low-voltage 0.18-

$\mu \text{m}$

CMOS process,...

article

Viability of endothelial cells after ultrasound-mediated sonoporation: Influence of targeting, oscillation, and displacement of microbubbles

Tom van Rooij, Ilya Skachkov, Inés Beekers, Kirby R. Lattwein, more

Journal of Controlled Release > 2016 > 238 > C > 197-211

Microbubbles (MBs) have been shown to create transient or lethal pores in cell membranes under the influence of ultrasound, known as ultrasound-mediated sonoporation. Several studies have reported enhanced drug delivery or local cell death induced by MBs that are either targeted to a specific biomarker (targeted microbubbles, tMBs) or that are not targeted (non-targeted microbubbles, ntMBs). However,...

chapter

Synthetic Aperture Sequential Beamforming for phased array imaging

Deep Bera, Johan G. Bosch, Nico de Jong, Hendrik J. Vos

2015 IEEE International Ultrasonics Symposium (IUS) > 1 - 4

2015 IEEE International Ultrasonics Symposium (IUS)

Synthetic Aperture Sequential Beamforming (SASB) is adapted for phased array ultrasound imaging. The primary advantage of using SASB is an improved lateral resolution without storing the raw channel data which can be realized on ultrasound systems with a relatively simple frontend. The performance of the beamforming technique is evaluated with simulations in Field II and by off-line processing of...

article

VLSI-DSP based real time solution of DSC–SRI for an ultrasound system

Kishor Prabhakar Sarawadekar, Harihar Bharat Indana, Deep Bera, Swapna Banerjee

Microprocessors and Microsystems > 2012 > 36 > 1 > 1-12

In this paper, VLSI-DSP based a real time solution for Digital Scan Conversion (DSC) and speckle reduced imaging (SRI) of an ultrasonography (USG) are proposed. DSC is needed to convert the polar format data to Cartesian coordinate to make them compatible for the display device. To reduce Moirè artifact a new interpolation algorithm is proposed which is a combination of warped distance based adaptive...

chapter

Mortality risk assessment for ICU patients using logistic regression

Deep Bera, Mithun Manjnath Nayak

2012 Computing in Cardiology > 493 - 496

2012 Computing in Cardiology Conference (CinC)

Prediction of outcome for patients in Intensive Care Unit (ICU) is of great interest since early 1980s. Various techniques had been proposed to evade this issue. Using Physionet/CinC Challenge 2012 data set we have identified maximum, mean and minimum as potential features extracted from the parameters measured during patients stay of 48hrs at ICU to accurately predict in-hospital mortality risk....

chapter

Cardiac arrhythmia detection using dynamic time warping of ECG beats in e-healthcare systems

B. S. Raghavendra, Deep Bera, Ajit S. Bopardikar, Rangavittal Narayanan

2011 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks > 1 - 6

2011 IEEE International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM)

Automatic real-time detection and classification of ECG patterns is of great importance in early diagnosis and treatment of life-threatening cardiac arrhythmia. In this paper, we have presented dynamic time warping (DTW) distance based approach for classification of arrhythmic ECG beats, with an aim of using it in smart-phone/mobile environment. The performance of the proposed method is tested on...

chapter

Pipelined DSP implementation of nonlinear anisotropic diffusion for speckle reduction of USG images

Deep Bera, Swapna Banerjee

2010 2nd International Conference on Computer Engineering and Technology > 2 > V2-49 - V2-53

2010 2nd International Conference on Computer Engineering and Technology (ICCET)

In this paper a real time approach to reduce speckle noise and enhance structures in speckle corrupted ultrasound image is proposed. It utilizes nonlinear anisotropic diffusion for speckle removal and edge enhancement. Unlike the conventional anisotropic diffusion performed in four different directions, here diffusion is performed in eight different directions. The algorithm has been proficiently...

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