Optimization of point spread function in ultrasound arrays
The design of aperture weightings in ultrasound arrays is a multi-objective optimization . In a linear array, the lateral point spread function around the focal point .
Linear electronic scanning type of ultrasonic imaging system using ...
A linear electronic scanning type of ultrasonic imaging technique using comb . time agreement of the two orthogonal focal points A linear array imaging system, .
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Analog Devices: Analog Dialogue: How Ultrasound System ...
A typical ultrasound system is almost identical in concept to the phased-array radar . the delay pattern and pulse train that set the desired transmit focal point. . Figure 3 shows how this is done for a linear array and a phased array; the main .
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Ultrasound Front-End IC Considerations
Ultrasound System Considerations and their Impact on Front- . beam. The focal point is determined, just like in the phased or linear array, by the delay .
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A High-Frequency High Frame Rate Duplex Ultrasound Linear Array ...
Jul 23, 2010 . The fixed focal point of the single-element transducer also limits the image . Quite recently linear array based HF ultrasound systems have .
A Numerical Simulation Study of Three Linear Array Arrangements ...
three linear array transducers for vibro-acoustography sys- . the focal zone is a modulated ultrasound wave that is . in (1) depends upon the focal point. £ .
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Continuum Ultrasonic Modeler™
the ever-increasing use of phased array ultrasound, the range and complex- . Linear array. Interface. Desired focal point positions. Rays in coupling medium .
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Linear Array Transducers with Improved Image Quality for Vascular ...
system. One type of ultrasound imaging system is the phased array system. . Influence of lens radius on focal point and elevation beam width. F +. R. V. B. V. L .
A Tactile Display using Ultrasound Linear Phased Array
the intensity of ultrasound is to use a linear phased array. A linear phased array consists of small ultrasound transducers and can produce a variable focal point.
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A brief introduction to ultrasound
These dimensions relative to the face of a linear array transducer are shown in Figure 1.2. . (PSF) as it propagates. Dimensions are relative to the focal point.
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Ultrasound PCS 335
range of frequencies present in an ultrasound pulse . Linear Array Scanning . Focal point can be moved toward or away from transducer by altering timing .
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Ultrasound phased arrays for prostate treatment
The ability to move the focal point is essential, since the treatment region is larger . ment size randomization in linear arrays,23 adaptive aperture techniques,32 .
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Advantages of phased-array probes for NDT/NDI appplications
Phased arrays have several advantages over conventional ultrasonic probes that . phased-array probe allows the user to change the shape and focal point of . The figure shows the radiated field calculated for a 32-element linear array for a .
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Defect Detection with Rayleigh and Lamb Waves Generated by a ...
A phased array technique allows for electronic adjustment of the focal region, . places the focal point on the defect producing the largest ultrasonic reflection . The linear transducer array consists of a single slice of piezoelectric material .
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5B-5 High-Frequency Duplex Ultrasound Imaging System for ...
Doppler imaging, using a 30 MHz 64-element linear array. The system included . The mechanical nature and fixed focal point of UBM, however, limit the further .
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Modeling of nonlinear ultrasound propagation in tissue from array ...
propagation in water and in tissue from phased linear arrays and other transducers of arbitrary quasiplanar . nate at the focal region of an ultrasound beam, near-field distortions . not always be advisable from a computational point of view.
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Development of High Frequency Ultrasound Transducers for ...
31. Linear Array Imaging. Array. Time-delayed electrical pulses for focusing. Focal Point. One focused ultrasound beam is used to form one image scan-line .
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Reconfigurable Arrays for Portable Ultrasound
enable highly portable ultrasound platforms. . annular array beamshape is nearly equivalent to a linear array . Transmit focal points at 10 and 40 mm shown.
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Large aperture Airborne Ultrasound Tactile Display using distributed ...
Oct 14, 2010 . Airborne Ultrasound Tactile Display (AUTD), which is developed in . in arbitrary point by steering the focal point using a linear phased array.
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Ultrasound image resolution is improved by electronic focusing of the beam. . many elements with appropriate delays such that they reach the desired focal point . arranged in a linear array, with different time delays such that all the pulses .
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Ultrasound Bioinstrumentation Problem Assignment #1 Q1 ...
Q5: Consider an ultrasound imaging linear array probe with 32 elements, . linear array with an arbitrary size N with element width W and kerf K for a focal point .
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4 Probe Selection, Machine Controls, and Equipment
. care point-of- care ultrasound: linear, curvilinear, and phased array. . close array, generating an image that comes from a point and is good for getting . based on certain gain and power settings, focal zones, frame rates, and other settings.
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Synthetic Aperture Method in Ultrasound Imaging
linear array are used, the quality of images directly depends on the . ultrasound scanner with one focal point; c) ANTARES ultrasound scanner with 8 focal .
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Ultrasound and Fourier optics
As discussed in Section 1.2, linear propagation is governed by the linear wave equation. . the rectangular aperture of a linear array lying along the lateral coordinate axis, . This is because at the focal point, the spherically converging waves .
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Zetec is your key supplier of conventional and phased array UT solutions for . Azimuthal Scanning, Depth Scanning, Linear Scanning . The result of this process is an a-scan that emphasizes the response from the desired focal point.
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State-of-the-art in two-dimensional ultrasonic transducer
Each element beam forms around its central ray; all central rays cross the axis at the focal point ofthe lens. With a linear array, the beams form a sector as .
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Energy-based adaptive focusing of waves: application to ...
linear transmit/receive array through a real aberrating layer. The array is used . If an aberrator is placed between the focal point and the ultrasonic array the p0 .
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Development and animal experiment of variable focusing HIFU ...
of 48 elements 3.6MHz linear array therapy transducers with cylindrical acoustic . focal length of high intensity ultrasound irradiation, and a 10mm diameter . images, focal points are clearly observed to be controlled from 30mm to 60mm. ? ? .
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Synthetic Transmit Aperture Method in Medical Ultrasonic Imaging
reconstructed. In experiments a 32-element linear transducer array with 0.48 mm . method; b) ANTARES ultrasound scanner with one focal point; c) ANTARES .
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A 63 element 1.75 dimensional ultrasound phased array for the ...
Phased arrays overcome this problem by electrically steering the focal point from . Another experimental design was a 62 × 1, linear array (75 × 15 mm2) with a .