Shear Wave Elastography Suite
Reproducible Results, Intuitively Visualised
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.
- Overcoming complications and limitations of biopsy
- 4 Smart Maps to visualise and quantify propagation in real-time, with a new variance map
- Combination with Smart 3D allows for volumetric elastography imaging
- One shot or continuous mode scanning and push pulse optimised for deeper regions
- Extension of compatible transducer range for endocavitary applications
- Twin View now available in Smart Maps for better assessment of the liver
- Enhanced worksheet for easier quantification
Shear Wave
Together We See More
Our elastography suite offers various Shear wave technologies that improve sensitivity and assessment capabilities delivered on dynamic layouts and multiple views.
Read a comparison of one-shot and continuous modes for Shear Wave Elastography and more.
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).
Cirrhotic liver disease
3D elastogram of a breast cancer
Testis with Leydig cell tumor
Enhanced worksheets
Approaches to liver tumours
Clinical Case StudyFuminori Moriyasu
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.
Diagnosis of liver fibrosis
Clinical Case StudyHiroko Iijima
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.
3D Shear Wave
3D Shear Wave technology with improved sensitivity to help with difficult to image patients. See our example of 3D Shear Wave assessing a breast lesion.
- Push pulse optimised for deeper regions
- 3D Mapping supports high confidence and productivity
- 3D Shear Wave exciting technology to support physician in better visualising hard lesions
SWE — Quad View
SWE — Quad View** lets you choose from multiple layout options.
Quad View Layouts
- Quad View Layout option A
- Quad View Layout option B
- Spot Zoom
- Quad or Twin (up / down or right / left)
- Freeze after Zoom
- Freeze after Quad layout changes
- Measurement Area Detection (MAD)
Layout option A
Layout option B
Un-zoomed
Zoomed / MAD
SWE MAD
An in-built tool for Measurement Area Detection (MAD)** of an elastogram.
| 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
- User measurements possible
- Quad; Twin and Zoom
Strain Elastography
Strain elastography is non-invasive, qualitative assessment of lesion elasticity for increased diagnostic confidence. Our strain elastography provides a visual representation of the elasticity of breast lesions following manual compressions. Based on well-established findings, malignant tissue has less elasticity than benign tissue.
ONE-SHOT VS CONTINUOUS
Clinical Paper
Sandra O’Hara
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.
Figure 1: Speed and propagation maps displaying 2.5cm x 3cm elastogram and two 10mm ROI’s registering the mean speed and SD for the ROI.
Figure 2: Bland-Altman Plot for Continuous vs One-shot Shear Wave speed, showing line of mean bias (0.016) and the 95% tolerance limits about zero bias line.
Figure 3: Scatterplot of median speed of Continuous vs One-shot modes showing line of perfect agreement of values.
Figure 4: Bland-Altman Plot of Continuous vs One-shot for elasticity, showing line of mean bias (0.143) and 95% tolerance limits about zero bias line.
Figure 5: Scatterplot of median elasticity of Continuous vs One-shot modes showing line of perfect agreement of values.
Figure 6: Shear wave propagation and ROI placement.
Figure 7: Shear wave propagation and ROI placement demonstrating a technically challenging case with one reliable ROI placement achieved.
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