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.

  1. Overcoming complications and limitations of biopsy
  2. 4 Smart Maps to visualise and quantify propagation in real-time, with a new variance map
  3. Combination with Smart 3D allows for volumetric elastography imaging
  4. One shot or continuous mode scanning and push pulse optimised for deeper regions
  5. Extension of compatible transducer range for endocavitary applications
  6. Twin View now available in Smart Maps for better assessment of the liver
  7. 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.

Maps 3D Elasticity Quad View MAD

Read a comparison of one-shot and continuous modes for Shear wave elastography and more.

Read more…

Shear waves are generated by means of an ultrasonic burst. Depending on tissue properties, shear waves travel at varying speed.

Radiology Elastography SuiteOur unique propagation mode can be used to confirm the quality of the shear wave generation (breast carcinoma).


Shear wave Cirrhotic liver diseaseCirrhotic liver disease
Shear wave 3D elastogram of a breast cancer3D elastogram of a breast cancer
Shear wave Testis with Leydig cell tumorTestis with Leydig cell tumor
Worksheet with quantitative measurementsEnhanced worksheets

 

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.

Download Paper

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.


 

Figure 6: Quantification of the degree of tissue differentiation and elasticity of HCC.

Approaches to Liver Tumors

Clinical Case Study

Fuminori 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.

Download Paper


 

Diagnosis of Liver Fibrosis

Clinical Case Study

Hiroko 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.

Download Paper

Figure 11: Comparison with liver biopsy findings.

 


Four Smart Maps

Shear wave speed (m/s)

Radiology Elastography Suite Smart Map Speed (m/s)

Two

Elasticity (kPa)

Radiology Elastography Suite Smart Map Unique Variance Technology

Three

Propagation (Unique)

Radiology Elastography Suite Smart Map Unique Propagation Technology

Four

Variance (Unique)

Radiology Elastography Suite Smart Map Elasticity (kPa)

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.

  1. Push pulse optimised for deeper regions
  2. 3D Mapping supports high confidence and productivity
  3. 3D Shear Wave exciting technology to support physician in better visualising hard lesions

Elastography

Elastography

Our comprehensive elastography* solution provides a visual representation (colour mapping) of the elasticity of breast lesions following manual compressions.


SWE — Quad View

SWE — Quad View** lets you choose from multiple layout options.

Quad View Layouts

  1. Quad View Layout option A
  2. Quad View Layout option B

Zoom Functionality

  1. Spot Zoom
  2. Quad or Twin (up / down or right / left)
  3. Freeze after Zoom
  4. Freeze after Quad layout changes
  5. Measurement Area Detection (MAD)
Radiology SWE Quad View Layout ALayout option A

Radiology SWE Quad View No ZoomUn-zoomed

Radiology SWE Quad View Layout BLayout option B

Radiology SWE Quad View Zoomed MADZoomed / MAD


Radiology SWE Measurement Area Detection (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

  1. Real time display
  2. User measurements possible
  3. 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.

*Available on Aplio 500 Platinum, and i-series systems. **Available on Aplio *i-series systems only. ^Not available on Aplio 400 systems.


SHARE THIS! Email this to someoneTweet about this on TwitterShare on LinkedInShare on FacebookShare on Google+