ACUSON Sequoia™ ultrasound system 2D-mode Soft Keys
This video will help the user understand the push rotary controls 2D-mode features using the ACUSON Sequoia™ ultrasound system.
Welcome in this video, we will review the 2D push Rotary key controls used to optimize your grayscale image. We begin with the 2D optimization tools found on the lower touchscreen. Remember, 2D mode functions such as line density selections depend upon the selected transducer an preset. At the end of this video you will be able to activate and deactivate 2D mode features located on the touch screen. All ultrasound systems allow for adjustment of a multitude of features to view a complete list of features, tap the question Mark icon located on the system touch screen. This opens the onboard user manual. We begin at the bottom of the touchscreen, which contains functions associated with the push Rotary keys. The first control on the lower left of the touchscreen activates or deactivates the clarify function. Select the higher level to increase sensitivity. Select the lower level to decrease sensitivity, let's take a look at how clarify vascular enhancement technology works here. You see, a real time carotid vessel image using the live dual function. This example shows how clarify reduces the reverberation artifact seen within the vessel on the left side of the live dual image. This allows visualization of the vessel Lumen an any stenosis. You have three fundamental frequency ranges, low, medium and high. The lower frequency setting increases your penetration. The mid frequency is a balance of resolution and penetration. A high frequency setting increases your resolution. Using the frequency feature with harmonics results in the same changes in penetration an resolution. Additionally, you will see a reduction in the noise and clutter on the image depending on the selected preset. An transducers available harmonic settings include H, low humid H high and H pen. Frequency imaging allows the user to adjust not only two D mode image, but also the color Doppler image. For example, the color Doppler frequency can be adjusted without changing the 2D mode frequency. Each mode has a range of frequency settings, resulting in the highest resolution penetration and sensitivity. The settings are transducer an, exam specific. The line density control adjusts the balance between the image line density or resolution and the frame rate or speed settings balance resolution with a frame rate. Available settings vary with transducer an preset. The Dynamic range control allows you to adjust the Shades of Grey on the image. This control allows you to choose a higher level, which shows more Shades of Grey while a lower level has fewer Shades of Grey. This function can be used on the real time or frozen image and is also available for M mode and Doppler spectral tracings. In focus uses coherent image formation to continuously optimize the image from the near to far field. This eliminates the need for multiple focal zones in focus technology helps increase frame rates. An image uniformity. You may also use conventional focusing, which displays as an icon on both the image and touch screen. Simply tap the single focus control. Rotate the focus off key to position the focal zone at or below the area of interest. Linear transducers allow for adjustment of the angle of the two D mode angle of insulation through adjustment of the steer control. Here we see an example of a negative 10 degree. 0. Or 10 degrees steering angle. Remember settings are transducer an preset specific? You can swipe the touch screen or tap the arrow on the lower right corner of the touch screen to move to the second page. On this page you will find the transmit power control located on the lower left touch screen. This control allows manual adjustment of the acoustic output sent by the transducer. The touch screen control and monitor image display the selected level as a percentage of the maximum transmit power allowed by local and international regulatory agencies. Four values of transmit power display on the image. The mechanical index is an indicator of the potential damage to tissue with the passing wave. The MI displayed on the image is a measurement from the entire image. There are three thermal indices calculated by the system. The TB displays the thermal index in bone. The TS, the soft Tissue thermal index. And the TC for the Cranial thermal index. The thermal index depends on the mechanical index and thus changes with adjustment of the transmit power control. You can find the persistence control on the second 2D mode page. Setting. The persistence tells the Acuson Sequoia ultrasound system how many images you want to average in the final data. If the persistence is set at one, the image updates with every sweep of the transducer moving the persistence to two results in an averaging of two images, the one that exists and the new one. Thus the setting of two. As you increase the persistence, the number of images averaged also increases. Pressing the Maps control allows you to select the processing curve to apply to the image. This function allows you to choose the application of Gray levels to the echo amplitudes. Gray Maps display more shades of Gray at the a setting with the fewest at F with G as a linear map. This function is also available for the color Doppler modes, M mode and spectral Doppler tracings. This function can be used on the real time or frozen image. You can add a color overlay to the 2D image by using the tint control. This function is also available for both the M mode. And Doppler spectrum and can be used on the real-time or frozen image. In this video you have learned how to activate and deactivate 2D mode features located on the touch screen.
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