Combining the APES and Minimum-variance Beamformers for Adaptive Ultrasound Imaging.


:In recent years, adaptive minimum-variance (MV) beamforming has been successfully applied to medical ultrasound imaging, resulting in simultaneous improvement in imaging resolution and contrast. MV has high resolution and hence can provide accurate estimates of the target locations. However, the MV amplitude estimates are significantly biased downward, especially when occurring the errors in model parameters. The amplitude and phase estimation (APES) beamformer gives much more accurate amplitude estimates at the target locations, but at the cost of lower resolution. To reap the benefits of both MV and APES, we have proposed a modified APES (MAPES) beamformer by adding a parameter which controls the trade-off between spatial and amplitude resolutions. We have also proposed an adaptive beamformer which combines the MV and APES. The proposed beamformer first estimates the peak locations using the MV estimator and then refines the amplitude estimates at these locations using the MAPES estimator. By using simulated and experimental data-point targets as well as cyst phantoms-we show the efficacy of the proposed beamformers.


Ultrason Imaging


Ultrasonic imaging


Mohammadzadeh Asl B




Has Abstract


2016-07-01 00:00:00














  • Phase-derivative imaging. II: Effects of beam diffraction and scatterer density.

    abstract::The potential of using the phase derivative (PD) of the radio-frequency echograms for producing 2-dimensional grey scale images was further investigated. The PD images were produced by five different algorithms, which according to the results described in the companion paper yield PD images dominated by the amplitude ...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Oosterveld BJ,Romijn RL,Thijssen JM

    更新日期:1989-07-01 00:00:00

  • An adaptive approach to computing the spectrum and mean frequency of Doppler signals.

    abstract::Modern ultrasound Doppler systems are facing the problem of processing increasingly shorter data sets. Spectral analysis of the strongly nonstationary Doppler signal needs to shorten the analysis window while maintaining a low variance and high resolution spectrum. Color flow imaging requires estimation of the Doppler...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Herment A,Giovannelli JF

    更新日期:1995-01-01 00:00:00

  • Linear arrays for vibro-acoustography: a numerical simulation study.

    abstract::In this work, we study linear array beamforming for vibro-acoustography systems. The goal of this research is to assess the feasibility of vibro-acoustography imaging systems based on linear arrays for clinical applications. The vibro-acoustography transducer is designed with two arrays driven by two continuous-wave o...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Silva GT,Greenleaf JF,Fatemi M

    更新日期:2004-01-01 00:00:00

  • Feasibility exploration of blood flow estimation by contrast-assisted Nakagami imaging.

    abstract::The microbubble contrast agent destruction/replenishment technique has been widely applied to ultrasound-based blood flow estimation. The rate of increase of the time-intensity curve (TIC) due to microbubbles flowing into the region of interest as measured from B-mode images closely reflects the flow velocity. In this...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Tsui PH,Yeh CK,Chang CC

    更新日期:2008-07-01 00:00:00

  • Variance and covariance of accumulated displacement estimates.

    abstract::Tracking large deformations in tissue using ultrasound can enable the reconstruction of nonlinear elastic parameters, but poses a challenge to displacement estimation algorithms. Such large deformations have to be broken up into steps, each of which contributes an estimation error to the final accumulated displacement...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Bayer M,Hall TJ

    更新日期:2013-04-01 00:00:00

  • In vivo study of online liver tissue classification based on envelope power spectrum analysis.

    abstract::An ultrasonic imaging and signal analysis system, combining a 3.5 MHz linear array B-scanner and an array processor, has been realized for a clinical liver tissue classification study. Based on the complete unprocessed rf data set of a real time B-image, local envelope power spectra averaged over interactively defined...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Lang M,Ermert H,Heuser L

    更新日期:1994-04-01 00:00:00

  • Dispersion and shear modulus measurements of porcine liver.

    abstract::A narrow-band ultrasonic shear-wave imaging technique for estimating phase speed was applied to fresh and thermally damaged porcine liver in vitro. Two constitutive models were applied to the measurements to represent rheological behavior of the tissue and estimate the complex shear modulus at frequencies between 50 a...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Orescanin M,Qayyum MA,Toohey KS,Insana MF

    更新日期:2010-10-01 00:00:00

  • Effects of transmit focusing on finite amplitude distortion based second harmonic generation.

    abstract::Generation of the second harmonic signal was studied for finite amplitude distortion based harmonic imaging. Acoustic field amplitudes along the range axis of a fixed focus transducer were measured using a PVDF needle hydrophone. Results indicated that on-axis amplitudes strongly depended on the f-number at both the f...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Li PC,Shen CC

    更新日期:1999-10-01 00:00:00

  • Computerized quantification analysis of left ventricular wall motion from echocardiograms.

    abstract::Two-dimensional echocardiography (2-D echo) imaging is a more attractive clinical tool than other modalities that either involve radiation exposure or are too slow to image heart motion in real-time. Computer-aided analysis of left ventricular(LV) wall motion provides quantitative parameters for diagnosis. This study ...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Chen T,Chen TP,Tsai LM

    更新日期:1997-04-01 00:00:00

  • Ultrasonic backscatter and attenuation (11-27 MHz) variation with collagen fiber distribution in ex vivo human dermis.

    abstract::This ex vivo study explores the relationship of ultrasonic attenuation and backscatter to dermal microarchitecture by comparing ultrasonic measurements of these parameters (11-27 MHz) to a microscopic analysis of three parameters describing the collagen distribution (mean thickness and spacing of collagen bundles alon...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Bridal SL,Fournier C,Coron A,Leguerney I,Laugier P

    更新日期:2006-01-01 00:00:00

  • Experimental Validation of ARFI Surveillance of Subcutaneous Hemorrhage (ASSH) Using Calibrated Infusions in a Tissue-Mimicking Model and Dogs.

    abstract::Acoustic radiation force impulse (ARFI) Surveillance of Subcutaneous Hemorrhage (ASSH) has been previously demonstrated to differentiate bleeding phenotype and responses to therapy in dogs and humans, but to date, the method has lacked experimental validation. This work explores experimental validation of ASSH in a po...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Geist RE,DuBois CH,Nichols TC,Caughey MC,Merricks EP,Raymer R,Gallippi CM

    更新日期:2016-09-01 00:00:00

  • Toward Noninvasive Mapping of Diffuse Scattering in the Presence of Motion.

    abstract::Ultrasonic coda wave analysis techniques localize defects in fields such as seismography and nondestructive testing. In medical ultrasound, these techniques might provide novel mapping of tissue properties in diseases characterized by local fibrosis. In this work, we present an approach for localizing variation in sca...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Lindsey BD,Collins GC

    更新日期:2020-01-01 00:00:00

  • Acoustic Structure Quantification Analysis of the Thyroid in Patients with Diffuse Autoimmune Thyroid Disease.

    abstract::The aim of this study was to assess whether acoustic structure quantification (ASQ) can differentiate normal from pathological thyroid parenchyma in patients with diffuse autoimmune thyroid disease (AITD). We evaluated 83 subjects (72 [87%] women and 11 [13%] men) aged 19 to 94 years with a mean age of 53 years. We pe...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Zandieh S,Bernt R,Zwerina J,Haller J,Knoll P,Seyeddain O,Mirzaei S

    更新日期:2016-03-01 00:00:00

  • Improved Fourier-transform-based parallel receive beam formation.

    abstract::A Fourier transform (FT)-based technique for forming parallel receive beams has been previously employed to increase the imaging frame rate in ultrasonic imaging. However, the image quality in FT-based parallel reconstruction is degraded because differences in range focusing delays are ignored and a wide transmit beam...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Li ML,Li PC

    更新日期:2003-04-01 00:00:00

  • A quantitative approach to speckle reduction via frequency compounding.

    abstract::Coherent speckle is a source of image noise in ultrasonic B-mode imaging. The use of multiple imaging frequencies has been suggested as a technique for speckle contrast reduction. This technique involves the averaging of images whose speckle patterns have been modified by a change in the spectrum of the transmitted or...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Trahey GE,Allison JW,Smith SW,von Ramm OT

    更新日期:1986-07-01 00:00:00

  • A Review of Ultrasound Tissue Characterization with Mean Scatterer Spacing.

    abstract::Tissues exhibiting quasi-periodic structures can be modeled as a collection of diffuse scatterers and coherent scatterers. The mean scatterer spacing (MSS) of coherent and quasi-periodic components is directly related to tissue microstructure and has become an important quantitative ultrasound (QUS) parameter in the c...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章,评审


    authors: Zhou Z,Wu W,Wu S,Jia K,Tsui PH

    更新日期:2017-09-01 00:00:00

  • A scalable architecture for real-time synthetic-focus imaging.

    abstract::A scalable architecture for forming real-time synthetic focus images is described and the design of a 256-channel system using currently-available technology is presented as an example implementation of the architecture. The parallelism of the system scales directly with the number of array elements and the image comp...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Richard WD

    更新日期:2003-07-01 00:00:00

  • Numerical study of higher-order diffraction tomography via the sinc basis moment method.

    abstract::Behavior and limitations of the sinc basis method have been discovered during simulation studies. An iterative row-action method (ART) is compared with a full-matrix, least-squares solution (QR decomposition) and the problem of multiple solutions is discussed. Knowledge of the spatial distribution of scattered field e...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Cavicchi TJ,O'Brien WD Jr

    更新日期:1989-01-01 00:00:00

  • Ultrasonic tomography of biological tissue.

    abstract::In this paper, quantitative tomographic reconstructions of biological tissue are presented. First, the experimental setup and a hybrid filtered backpropagation (FBP) technique are briefly described. Using this technique, which includes exact backpropagation of data prior to reconstruction by means of the classical FBP...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Sponheim N,Gelius LJ,Johansen I,Stamnes JJ

    更新日期:1994-01-01 00:00:00

  • Autoregressive spectral estimation in ultrasonic scatterer size imaging.

    abstract::An autoregressive (AR) spectral estimation method was considered for the purpose of estimating scatterer size images. The variance and bias of the resulting estimates were compared with those using classical FFT periodograms for a range of input signal-to-noise ratios and echo-signal durations corresponding to various...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Chaturvedi P,Insana MF

    更新日期:1996-01-01 00:00:00

  • Mean scatterer spacing estimation in normal and thermally coagulated ex vivo bovine liver.

    abstract::The liver has been hypothesized to have a unique arrangement of microvasculature that presents as an arrangement of quasiperiodic scatterers to an interrogating ultrasound pulse. The mean scatterer spacing (MSS) of these quasiperiodic scatterers has been proposed as a useful quantitative ultrasound biomarker for chara...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Rubert N,Varghese T

    更新日期:2014-04-01 00:00:00

  • Attenuation estimation with the zero-crossing technique: phantom studies.

    abstract::Global and local attenuation coefficient estimations were performed in a phantom using a pulse echo method based on the rate of decay of zero crossing density. Focussed and unfocussed 3.5 MHz transducers were used. It was found that good global estimates could be made with either transducer over a 2:1 range of attenua...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Ophir J,Ghouse MA,Ferrari LA

    更新日期:1985-04-01 00:00:00

  • Optimization of signal-to-noise ratio for multilayer PZT transducers.

    abstract::In medical ultrasound imaging, two-dimensional (2-D) array transducers are desirable to implement dynamic focusing and phase aberration correction in two dimensions as well as volumetric imaging. Unfortunately, the small size of a 2-D array element results in a small clamped capacitance and a large electrical impedanc...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Goldberg RL,Smith SW

    更新日期:1995-04-01 00:00:00

  • Mathematical simulation of pressure pulse propagation in biological tissues.

    abstract::The propagation of pressure pulses of arbitrary time form in inhomogeneous attenuating media with characteristics similar to real biological tissues is considered. A mathematical model using the quasi-optical approximation is developed to solve the wave equation. Such a model proves to be convenient for computer reali...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Adrov VN,Chernomordik VV

    更新日期:1993-01-01 00:00:00

  • Optimal transmit phasing for harmonic-background suppression with bipolar square-wave pulser.

    abstract::Optimal transmit phasing has been proposed to increase contrast-to-tissue ratio (CTR) by relatively phasing the tissue and leakage harmonic components to cancel each other out for tissue-background suppression in harmonic imaging. Since most clinical systems are only equipped with a bipolar square-wave pulser, effecti...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Shen CC,Yang YC,Chen WS

    更新日期:2010-01-01 00:00:00

  • GPU-accelerated Kernel Regression Reconstruction for Freehand 3D Ultrasound Imaging.

    abstract::Volume reconstruction method plays an important role in improving reconstructed volumetric image quality for freehand three-dimensional (3D) ultrasound imaging. By utilizing the capability of programmable graphics processing unit (GPU), we can achieve a real-time incremental volume reconstruction at a speed of 25-50 f...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Wen T,Li L,Zhu Q,Qin W,Gu J,Yang F,Xie Y

    更新日期:2017-07-01 00:00:00

  • Subharmonic contrast microbubble signals for noninvasive pressure estimation under static and dynamic flow conditions.

    abstract::Our group has proposed the concept of subharmonic aided pressure estimation (SHAPE) utilizing microbubble-based ultrasound contrast agent signals for the noninvasive estimation of hydrostatic blood pressures. An experimental system for in vitro SHAPE was constructed based on two single-element transducers assembled co...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Halldorsdottir VG,Dave JK,Leodore LM,Eisenbrey JR,Park S,Hall AL,Thomenius K,Forsberg F

    更新日期:2011-07-01 00:00:00

  • Attenuation and backscatter estimation using video signal analysis applied to B-mode images.

    abstract::Most methods for in vivo quantitation of ultrasound attenuation and backscatter are not available clinically because they rely upon acquiring and analyzing radio frequency (rf) echo signals. This paper describes a technique to estimate ultrasound attenuation and backscatter from B-mode image data. The video signal ana...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Knipp BS,Zagzebski JA,Wilson TA,Dong F,Madsen EL

    更新日期:1997-07-01 00:00:00

  • Effective scatterer diameter estimates for broad scatterer size distributions.

    abstract::Acoustic form factors have been used to model the frequency dependence of acoustic scattering in phantoms and tissues. This work demonstrates that a broad range of scatterer sizes, individually well represented by Faran theory or a Gaussian form factor, is not accurately described by a single effective scatterer from ...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Nordberg EP,Hall TJ

    更新日期:2015-01-01 00:00:00

  • Ultrasound attenuation measurements of the liver in vivo using a commercial sector scanner.

    abstract::Attenuation measurements of various tissue mimicking phantoms and three different groups of patients were obtained using a modified commercial sector scanner. Estimates of attenuation were made using the spectral shift method with mean frequencies at different depths of a region of interest being obtained by both zero...

    journal_title:Ultrasonic imaging

    pub_type: 杂志文章


    authors: Garra BS,Shawker TH,Nassi M,Russell MA

    更新日期:1984-10-01 00:00:00