bk ultrasound Flex Focus 1202, User Manual

Page: 33 / 66

Flex Focus 1202 User Guide (BB1756-Q) Safety Information 33
Verifying the Transducer Type
Measurements
Pay careful attention when you position cursors to make measurements on a scanned
image or on a Doppler curve.
Nuchal Translucency
VFI – Vector Flow Imaging
Type
number
displayed
must match
number on
transducer
WARNING Exam-w4
Before you start to image, verify that the type number on the transducer matches the
number displayed on the monitor. In case of any inconsistency, stop imaging, turn off the
system, and contact your local BK Ultrasound representative.
Polygon
measuring
tool
WARNING M-w1
To prevent wrongful diagnosis, you must be aware that:
•
When you use the polygon measuring tool, if the sides of the polygon intersect
(as in forming a curve like a figure eight, for example), the area calculation is
incorrect. In this case, the calculated area of the polygon is the area of the bigger
loop minus the area of the smaller loop.
Using
Doppler
curves
WARNING M-w2
Drawings of Doppler curves, manual and automatic, are meant as tools for positioning
cursors so that measurements based on the curves can be calculated automatically. The
system has no facilities for checking whether the automatic measurements are
reasonable. Curves drawn on very noisy spectra may lead to misplacement of
measurement cursors. Make sure that measurement cursors are positioned so that the
results are reasonable. If they are not, you must adjust the position of the cursors manually.
Nuchal
translucency
Caution NT-c1
You must be adequately trained before you attempt to make nuchal translucency
measurements.
Artifacts
WARNING VFI-w1
Before you turn on VFI, check the B-mode image to make sure there are no artifacts visible
in the blood vessel. If there are strong artifacts in the B-mode image, the arrows in VFI may
be pulled to point in a more axial direction (toward or away from the transducer),
especially in low flow situations with correspondingly low PRF. These artifacts will not
affect the color mode (CFM) image, so it is important to check in B-mode.