GE Voluson E Series Service Manual page 162

Components and Functions (Theory)
5.1.4.4 HDlive Studio
live Studio offers three independent light sources with three different light types (directional, point, spot)
HD
and contains a special render function to visualize the amniotic fluid. The "Light Menu" enables the user to
switch the different light sources on/off, to select light types, change positions of the light sources and to
define and use complete sets of adjustments with preset buttons.
The light source positions are indicated with the help of a graphical icon situated in the right lower corner of
the rendered 3D or 4D image.
5.1.4.5 VOCAL II - Virtual Organ Computer-aided Analysis
Diagnosis and therapy of cancer is one of the most important issues in medical care. The VOCAL II -
Imaging program allows completely new possibilities in cancer diagnosis, therapy planning and follow-up
therapy control.
VOCAL II offers additional functions:
•
Manual or Semi automatic Contour detection of structures (such as tumor lesion, cyst, prostate, etc.)
and subsequent volume calculation. The accuracy of the process can be visually controlled by the
examiner in multi-planar display.
•
Construction of a virtual shell around the contour of the lesion. The wall thickness of the shell can be
defined. The shell can be imagined as a layer of tissue around the lesion, where the tumor
vascularization takes place.
•
Automatic calculation of the vascularization within the shell by 3D color histogram by comparing the
number of color voxels to the number of grayscale voxels.
5.1.4.6 Advanced VCI
5.1.4.6.1 VCI Omni View - Volume Contrast Imaging (any plane)
More flexibility with Any Plane, VCI plane is freely selectable. Any shape can be drawn. Volumes from older
BT's can be loaded and edited with VCI Omni View without any limitations.
•
Volumes can be edited in all other Visualization Modes.
•
Dual Format is now also possible in Render Mode and Sectional Planes Mode.
•
VCI slice thickness can be set to zero.
5.1.4.7 Coded Contrast Imaging
Injected contrast agents re-emit incident acoustic energy at a harmonic frequency much more efficiently than
the surrounding tissue. Blood containing the contrast agent stands out brightly against a dark background of
normal tissue. Possible clinical uses are to detect and characterize tumors of the liver, kidney and pancreas
and to enhance flow signals in the determination of stenosis or thrombus.
5.1.4.8 Elastography
Elastography refers to the measurement of elastic properties of tissues, based on the well-established
principle that malignant tissue is harder than benign tissue.
Elastography shows the spatial distribution of tissue elasticity properties in a region of interest by estimating
the strain before and after tissue distortion caused by external or internal forces. The strain estimation is
filtered and scaled to provide a smooth presentation when displayed.
During scanning in the elastography mode, the examiner manually slightly compresses the tissue using the
ultrasound probe. A strain correlation (strain is the deformation of the tissue by compression) is continuously
performed for visual perception on the monitor.
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Voluson E-Series Service Manual
5539550APB Revision 6