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Biomedical Engineering, IEEE Transactions on

Issue 8 • Date Aug. 1983

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Displaying Results 1 - 13 of 13
  • IEEE Transactions on Biomedical Engineering - Table of contents

    Publication Year: 1983 , Page(s): c1
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  • IEEE Engineering in Medicine and Biology Society

    Publication Year: 1983 , Page(s): c2
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  • Medical Ultrasound

    Publication Year: 1983 , Page(s): 429 - 430
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  • Measurement of Ultrasonic Attenuation Within Regions Selected from B-Scan Images

    Publication Year: 1983 , Page(s): 431 - 437
    Cited by:  Papers (26)  |  Patents (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5630 KB)  

    This paper describes the calculation of absolute ultrasonic attenuation as a function of frequency by processing backscattered signals obtained from a clinical imaging instrument. The signal processing steps are developed from a mathematical model of scattering in an attenuating medium with random inhomogeneities. Attenuation data are derived from the imaging system by recording amplitude-compressed ultrasonic echo waveforms along with transducer position information and time-varying gain values. The input-output characteristics of the receiver are employed to remove the effects of compression and gain. Attenuation values are calculated for selected regions within scans of two tissue phantoms and a normal breast. The values agree with other independent measurements and illustrate the requirements for incorporating quantitative attenuation measurements with clinical imaging. View full abstract»

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  • Beam Steering with Linear Arrays

    Publication Year: 1983 , Page(s): 438 - 452
    Cited by:  Papers (84)  |  Patents (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (7962 KB)  

    The principles and techniques of real-time imaging with phased array ultrasound scanners are reviewed. Topics include 1) the geometric optics of beam steering and focusing with a linear array in the transmit and receive modes; 2) limitations on image data acquisition due to ultrasound propagation velocity; 3) optical diffraction theory for linear arrays including effects of amplitude grating lobes. Limitations on the image quality of phased array imaging systems are also discussed, including 1) nonideal response of array transducers; 2) target ambiguities caused by phase error grating lobes; 3) refraction errors; 4) delay line design. Finally, an analysis is presented of current techniques for improving ultrasound image quality using phased array methods including phase compensation, spatial compounding, frequency compounding, and parallel processing. View full abstract»

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  • Ultrasound Transducers for Pulse-Echo Medical Imaging

    Publication Year: 1983 , Page(s): 453 - 481
    Cited by:  Papers (63)  |  Patents (12)
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    The transducer is probably the single most important component of any ultrasonic imaging system. A basic introduction to the problems and paradoxes of transducer design is given. After introducing the piezoelectric equations and discussing important transducer material such as lead zirconate titanate and polyvinylidene difluoride, the techniques for modeling the electromechanical impulse response are reviewed. Quarter-wave matching and short pulse techniques are discussed. The prediction of the ultrasound field of plane, spherical, and conical transducers is reviewed with emphasis on the spatio-temporal impulse response technique. Finally, the use of the above approaches is illustrated in a very practical fashion for three interesting transducer geometries: 1) a split aperture device with two focal lengths, 2) a five-element annular array, and 3) a 37.5 degree conical/annular array hybrid transducer. View full abstract»

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  • An Ultrasonic Technique for Imaging the Ventricle in Three Dimensions and Calculating Its Volume

    Publication Year: 1983 , Page(s): 482 - 492
    Cited by:  Papers (56)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5788 KB)  

    Real-time two-dimensional ultrasonic scanners provide a series of cross-sectional images of the ventricle. We have developed a technique which can determine the spatial position and orientation of a collection of such scans with respect to a reference coordinate system. The scans need not be parallel, may intersect, and need not demonstrate a complete cross section. The borders of interest are digitized to identify a set of points representing the surface of the ventricle. These points are used to generate a 3-D reconstruction of the chamber and are processed to give an estimate of ventricular volume. The technique has been validated using ten formalin-fixed hearts excised from dogs, sheep, and cows, with an actual volume range of 31.8-570.6 cm3. Each ventricle was imaged five times by three observers for a total of 150 studies. By the least squares linear regression analysis, calculated volume = 0.98 (actual volume) + 1.39 cm3, r = 0.99. The average error for all studies was 5 percent, while 88 percent of the individual calculated volume were within 10 percent of the actual volume. The method appears to offer the potential for the accurate assessment of ventricular volume in man. View full abstract»

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  • Preview of Abstracts Fifth Annual Conference of the IEEE Engineering in Medicine and Biology Society

    Publication Year: 1983 , Page(s): 493 - 557
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  • Applications Invited for Transactions Associate Editor for Physiological Modeling

    Publication Year: 1983
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  • Set your sails for Columbus and the 5th Annual IEEE-EMBS Conference

    Publication Year: 1983 , Page(s): 558a
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  • Now is the best time to join our Society

    Publication Year: 1983 , Page(s): 558-b
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  • IEEE Transactions on Biomedical Engineering Statement of Editorial Policy

    Publication Year: 1983 , Page(s): 558-c
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  • Institutional listings

    Publication Year: 1983 , Page(s): 558d
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Aims & Scope

IEEE Transactions on Biomedical Engineering contains basic and applied papers dealing with biomedical engineering. Papers range from engineering development in methods and techniques with biomedical applications to experimental and clinical investigations with engineering contributions.

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Meet Our Editors

Editor-in-Chief
Bin He
Department of Biomedical Engineering