GE Vivid i, User Manual

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Contrast Imaging
104
Vivid i User’s Manual
2378958-100 Rev. 02
Introduction
Vivid i supports Left Ventricular Contrast imaging : Optimized
for endocardial border detection and assessment of wall motion
and wall thickening.
Left Ventricular Contrast Imaging
The Left Ventricular (LV) Contrast application has an optimized
system preset for optimal resolution of endocardial borders and
for optimal assessment of wall motion and wall thickening.
The LV Contrast application may help to identify LV thrombus
and evaluate wall motion.
WARNING
Misdiagnosis based on image artifacts
Misdiagnosis in ultrasound contrast images may be caused by
several artifacts, most importantly:
Motion artifacts: gives rise to signals independently of contrast
presence. This may be caused by patient movement; including
respiration, or by probe movement influenced by the operator.
Regional drop outs: caused by unintentional destruction of the
contrast agent, too low concentration of contrast agent, poor
acoustic penetration due to rib/lung shadows or system failing to
detect the contrast agent due to erroneous settings induced by
the operator.
Tissue harmonics: gives contrast-like signals independently of
the presence of contrast agent.
Default machine settings are set to minimize the amount these
artifacts, but the operator has to take these artifacts into account
while analyzing the data and confirm the results using other
techniques.