Medical Ultrasound Imaging
Saturday, 23 November 2024
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A bolus is a rapid infusion of high dose contrast agent. Dynamic and accumulation phase imaging can be performed after bolus injection. Since the transit time of the bolus is only a short time, images with high frame rate show the wash in and wash out of the contrast material.
The injection rate and the total injected volume modifies the bolus peak profile. Substantial changes in the concentrations during signal acquisition induce artifacts. Furthermore, the hemodynamic parameters (cardiac output, blood pressure) influence the bolus profile. However, the characteristics of ultrasound contrast agents are favorable with a continuous perfusion. See also Negative Bolus. • •
Contrast microbubbles can be destroyed by intense ultrasound and the scattered signal level can increase abruptly for a short time during microbubble destruction, resulting in an acoustical flash (sudden increase in echogenicity). Intermittent imaging with high acoustic output utilizes the properties of contrast microbubbles to improve blood-to-tissue image contrast by imaging intermittently at very low frame rates. The frame rate is usually reduced to about one frame per second, or it is synchronized with cardiac cycles so that enough contrast microbubbles can flow into the imaging site where most microbubbles have been destroyed by the previous acoustic pulse. Because bubbles are destroyed by ultrasound, controlling the delay time between frames produces images whose contrast emphasizes regions with rapid blood flow rate or regions with high or low blood volume. • 
From Hitachi Medical Corporation (HMC), sales, marketing and service in the US by Hitachi Medical Systems America Inc.The HI VISION™ 5500 - EUB-5500 fully digital ultrasound system delivers the latest generation of signal processing technology, sophisticated transducer design, and a host of features and options for advanced imaging capabilities across a wide range of clinical situations. This system is compatible with all Pentax ultrasound endoscopes.
Device Information and Specification
APPLICATIONS
Abdominal, brachytherapy/cryotherapy, breast, cardiac, dedicated biopsy, endoscopic, intraoperative, laparoscopic, musculoskeletal, OB/GYN, pediatric, small parts, urologic, vascular
CONFIGURATION
Compact system
Five frequency (except mini-probes)
Linear, convex, radial, miniradial/miniprobe, biplane, phased array, echoendoscope longitudinal, echoendoscope radial
3 modes of dynamic tissue harmonic imaging (dTHI), pulsed wave Doppler, continuous wave Doppler, color flow imaging, power Doppler, directional power Doppler, color flow angiography, real-time Doppler measurements
IMAGING OPTIONS
3RD generation color artifact suppression
OPTIONAL PACKAGE
STORAGE, CONNECTIVITY, OS
Patient and image database management system, HDD, FDD, MOD, CD-ROM, Network, DICOM 3.0, Windows XP
DATA PROCESSING
H*W*D m (inch.)
1.40 x 0.51 x 0.79 (55 x 20 x 31)
WEIGHT
130 kg (286 lbs.)
POWER CONSUMPTION
1.2kVA
ENVIRONMENTAL IMPACT
4096 btu/hr heat output
• 
From Hitachi Medical Corporation (HMC);The HI VISION™ 6500 - EUB-6500 high resolution digital ultrasound system offers advanced clinical imaging, enhanced operating efficiency, and remarkable clinical flexibility, all in robust and versatile configuration that simply represents a better clinical solution in a variety of real-world, real-work arenas.
Device Information and Specification
APPLICATIONS
Abdominal, brachytherapy/cryotherapy, breast, cardiac, dedicated biopsy, endoscopic, intraoperative, laparoscopic, musculoskeletal, OB/GYN, pediatric, small parts, urologic, vascular
CONFIGURATION
Compact system
Linear, convex, radial, miniradial/miniprobe, biplane, phased array, echoendoscope longitudinal, echoendoscope radial
Tissue Doppler imaging (TDI), pulsed wave Doppler, continuous wave Doppler, color flow imaging, power Doppler, directional power Doppler, color flow angiography, real-time Doppler measurements, 4 modes of dynamic tissue harmonic imaging (dTHI), wideband pulse inversion imaging (WPI)
IMAGING OPTIONS
3RD generation color artifact suppression
OPTIONAL PACKAGE
3D ultrasound, dual omni-directional M-mode display, steerable CW Doppler, dynamic contrast harmonics imaging, stress echo, Pentax EUS and Fujinon Mini-probe
STORAGE, CONNECTIVITY, OS
Patient and image database management system, HDD, FDD, MOD, CD-ROM, Network, DICOM 3.0, Windows XP
DATA PROCESSING
H*W*D m (inch.)
1.40 x 0.51 x 0.79 (55 x 20 x 31)
WEIGHT
130 kg (286 lbs.)
POWER CONSUMPTION
1.2kVA
ENVIRONMENTAL POLLUTION
4096 btu/hr heat output
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former US-TIP.com
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Copyright © 2008 - 2024 SoftWays. All rights reserved.
Terms of Use | Privacy Policy | Advertise With Us
[last update: 2023-11-06 01:42:00]