General Advices To Obtain Good Rendered 3D Images - GE VOLUSON 730Pro Basic User Manual

Volume Mode
11.1.6

General Advices to Obtain Good Rendered 3D Images

B-MODE
* Poor quality of the volume scan will lead to a poor quality 3D image.
* For a good 3D image quality, adjust high contrast in 2D mode of the interesting structures
before starting the volume scan.
* Only the ultrasound data within the ROI (render box) will be calculated and displayed.
* The correct placement of the ROI is essential for a good result, because the ROI determines
the view onto the interesting object.
* Surface Mode: note that the surface of interest has to be surrounded by hypoechoic structures,
otherwise the system is unable to define the surface. With the function "THRESHOLD" echo
structures adjacent to the surface can be "cut off" if their gray values are much lower than the
gray values of the surface structures.
* Minimum Mode: note that the interesting objects (vessels, cysts) should be surrounded by
hyperechoic structures. Avoid dark areas (shadows caused by attenuation, dark tissue
presentation) within the ROI, otherwise large parts of 3D images will be displayed dark.
* Maximum Mode: avoid bright artifact echoes within the ROI, otherwise these artifacts are
displayed in the 3D images.
* X-Ray like Mode: note that all gray values within the ROI are displayed. Therefore, in order
to enlarge the contrast of the structures within the ROI, the depth of the ROI should be
adjusted as low as allowable.
COLOR MODE:
* Poor quality of the Color image in 2D mode will lead to poor image quality in 3D color image.
* In Power-Doppler mode (control "PD") a pure flow display without directional coding is given.
* Use small VOL box and small sweep angle to reduce acquisition time.
* Smoothing Filter (Rise and Fall in 2D-image) leads to smoother flow and a good color 3D
display of vessels (e.g., filtering of high pulsatile vessels).
Disadvantage: The higher the filter setting, the longer the acquisition time.
* Surface Mode: Displays the surface of the vessels (color signals) within the tissue volume.
Note: If the Mix control is adjusted to 100% color, the gray scale tissue information becomes
transparent.
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Voluson 730Pro - Basic User Manual
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