Experience non-invasive, quantitative assessment for confident diagnosis with our Shear Wave technology* suite, which provides a quantitative measure and dynamic visual display of tissue stiffness. Gain valuable diagnostic information in easy to understand visual, parametric and quantitative formats, our advanced suite helps you avoid extra exams in order to get your diagnostic answer. Saving your patients, clinicians and practice while enhancing productivity.
Shear waves are generated by means of an ultrasonic burst. Depending on tissue properties, shear waves travel at varying speed.
Our unique propagation mode can be used to confirm the quality of the shear wave generation (breast carcinoma).
Department of Gastroenterology and Hepatology, Tokyo Medical University
Ultrasound elastography, which is widely employed for the assessment of liver diseases, is categorised into two types: strain elastography, which evaluates strain in response to pressure, and shear wave elastography, which measures the propagation velocity of shear waves. In shear wave velocity measurements, shear waves are generated by applying mechanical vibration or pressure or by applying acoustic pressure. Shear Wave Elastography (SWE), which has been developed by Canon Medical Systems, employs the latter method and also allows the propagation velocities of shear waves to be quantified and mapped. Study discusses SWE approach to liver tumors, including the differential diagnosis of tumors and the applications of SWE in local treatment.
Figure 6: Quantification of the degree of tissue differentiation and elasticity of HCC.
Department of Hepatobiliary and Pancreatic Disease, Ultrasound Imaging Center Hyogo College of Medicine
The conventional methods employed in diagnostic ultrasound examinations for chronic liver diseases include the assessment of B-mode images, the evaluation of non-uniformity in the Rayleigh distribution (ASQ), and the estimation of disease progression based on indices of congestion as well as hepatic vein wave forms obtained by Doppler scanning. Following the introduction of ultrasound contrast agents, estimation of the severity of liver diseases based on the times required for contrast agent to reach the hepatic arteries, portal vein, and hepatic veins and functional diagnosis based on the phagocytic activity of Kupffer cells have also been performed. This paper discusses the assessment of liver stiffness using shear waves, which is one of the recently developed elastography methods that is attracting a great deal of interest.
Figure 11: Comparison with liver biopsy findings.
SWE — Quad View** lets you choose from multiple layout options.
Layout option A
Layout option B
Zoomed / MAD
Colour ROI is divided into small regions (SD-ROI) and calculates SD value of each region
User selects and sets the threshold region, displaying an average value and SD values
The SD-ROI used in the calculation is displayed in the colour in the ROI
Real time display
SKG Radiology, West Perth, Department of Medical Radiation Sciences, Curtin University, Perth, Australia
When using the shear wave elastography mode, the Aplio 500 system supplies two methods to obtain readings of meters per second (m/s), and kilopascals (kPa) to assess the stiffness of tissues in the human body; the one-shot and continuous methods. The one-shot method activates the main pulse over one frame to measure the resultant speed of the shear wave and elasticity in the tissue being examined. A single image is produced to register the stiffness measurements. The continuous mode provides a live acquisition of the elastographic and propagation maps, and multiple images are acquired over time. It is also possible to cine-loop back through the frames to register multiple stiffness measurements from the one acquisition.
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