Volcano CORE Mobile, Руководство оператора

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Chapter 9: Using VH IVUS
NOTE: VH IVUS is available on Eagle Eye family of catheters only. Currently, this
feature is not available on Visions family of catheters.
Overview
Traditional IVUS has improved the effectiveness of catheter-based coronary therapies.
However, it stops short of the ability to characterize and assess lesion composition. The
VH IVUS software enhances the current grayscale IVUS diagnostic approach to coronary
artery disease by automating the vessel border boundary detection and providing the user
with color coded images that more precisely identify what type of plaque is present.
The VH IVUS software is capable of differentiating four tissue types from the radio
frequency (RF) data. All elements with the plaque boundaries as defined by the border
are identified as one of four tissue types and color-coded:

FI Fibrous (green)

FF Fibro-Fatty (light green)

NC Necrotic Core (red)

DC Dense Calcium (white)
Implantable devices such as stents, staples, grafts, and leads will appear as one of the four
plaque types as well (if located between the lumen and vessel borders).
VH analysis is provided only on ECG gated frames (1frame/cycle). The traditional
grayscale IVUS is not gated.
As a pullback occurs, the VH borders are identified on the ILD.
NOTE : A valid ECG signal must be received by the Volcano system during acquisition
for VH to be available.