Medical Ultrasound Imaging
Saturday, 4 May 2024
 Info Sheets  Out- side     | 'Filtering' Searchterm 'Filtering' found in 5 articles 5 definitions [ • ] Result Pages : •
B-scan comined with D-scan (D=Depth) is used to avoid image inhomogeneity. Different transmitter signals for each depth are applied and prefiltered pseudoinversely according to the transfer properties of the covering tissue. Pulse compression techniques with nonlinearly frequency modulated signals are used to gain the required energy for inverse filtering. D-scan is a modified C-scan used in nondestructive testing with the display of amplitudes. In the 2D graphical presentation, time of flight values are displayed in the top view on a test surface. See also A-Scan, B-Scan and C-Scan. •
Frame averaging is a form of lowpass filtering. With frame averaging temporal variation are smoothed by addition of consecutive frames in a real-time mode.
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(HPD) Harmonic power Doppler is currently one of the most sensitive techniques for detecting ultrasound contrast agents. HPD works by transmitting multiple pulses toward the object to be imaged and detecting the pulse-to-pulse changes in the received echo signals. Second harmonic bandbass filtering is applied to the received signals to exploit the non-linear behavior of scattering from bubbles (clutter). Harmonic power Doppler operates best at high output levels because of increased contrast destruction, and pulse amplitudes close to the maximum allowed are used much of the time. With a high mechanical index, non-linear propagation of the sound will cause significant harmonic components from tissue, and the contrast agent to tissue ratio will decrease. Also called Harmonic Power Angio. See also Multiple Frame Trigger.  Further Reading: Basics:
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The resolution is the ability to distinguish two adjacent objects or in Doppler measurements the smallest detectable change in flow. Probe resolutions are generally specified at 0.1Hz filtering. See also Matrix Size. • 
From Medison Co.,Ltd.;'The SONOACE 9900 offers exceptional B/W image clarity by newly developed FINE™ Filter technology, which contributes to edge enhancement and average filtering in real-time. OSIO™(Organ Specified Image Optimization)sets the best diagnosis environment with minimum manual operation and increases patient throughput. Also, color images are improved with better color Doppler performance, high color sensitivity, fine pixel image, and reduced flash artifact across all probes.' 'The SONOACE 9900 PRIME from Medison offers full range of applications specially designed for your practice. With the addition of the new C-Square Processing and PSAD Beamformer, SONOACE 9900 PRIME provides higher contrast resolution and clearer image quality in all application ranges. Based on super clear image resolution and versatile 3D functions, SONOACE 9900 PRIME offers you the true value of future ultrasound technology.' Result Pages : | Share This Page     Look Ups |
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[last update: 2023-11-06 01:42:00]