GE H
EALTHCARE
RAFT
V
OLUSON
E8 / V
OLUSON
E6
D
IRECTION
KTD102576, R
EVISION
7
DRAFT (A
UGUST
23, 2012)
S
ERVICE
M
ANUAL
5-20
Section 5-2 - General Information
5-2-4-14
SonoNT
SonoNT is an additional function for manual NT (Nuchal Translucency) measurement.
This function supports the user to find the correct position for the NT measurement.
The user can switch between NT Method “Manual” and “Sono NT” (semi-automatic).
A Box has to be placed for the NT-ROI. Then the NT-distance is calculated automatically, a graphic
(yellow head-image) and the NT-result are displayed.
If no result is found a temporary warning “No valid NT-distance found!” is displayed.
5-2-4-15
SonoIT
SonoIT =
Sono
graphy based
I
ntracranial
T
ranslucency measurement
SonoIT is a Semi-automatic measurement for the Intracranial Transluceny. The IT-buttom can be found
in the “Early Gestation” section beside the NT-button.
The workflow of this measurement is identical to the SonoNT measurement.
5-2-4-16
SonoBiometry
SonoBiometry is an alternative to the common fetal biometry measurements.
It provides system suggested measurements for BPD, HC, AC and FL which need to be confirmed by
the user or can be changed manually.
The following automated fetal biometry measurements are available:
•
BPD (o-o) – Biparietal diameter type: outside-outside
•
BPD (o-i) - Biparietal diameter type: outside-inner
•
HC – Head circumference
•
AC – Abdomen circumference
•
FL – Femur length
•
BPD + HC: combined measurement
The measurement mode can be changed from automatic to manual. Available measurement methods
depend on this selection and on the measurement item itself.
It is not necessary to select a region where the measurement should be performed.
5-2-4-17
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.
BT
Version:
BT-Version:
This option “SonoNT” is only available at systems with BT10 software.
At systems with BT12 and BT13 software, this feature is standard.
BT
Version:
BT-Version:
The “SonoIT” feature is standard at systems with BT13 software.
BT
Version:
BT-Version:
The “SonoBiometry” feature is standard at systems with BT13 software.
BT
Version:
BT-Version:
This option “Elastography” is only available at systems with BT10, BT12 and BT13 software.