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cycles, marking the site on video
advances to the next site.
tape.
The program
automatically
8.2.7
The sonographer confirms advancement
of the program
the Right Bifurcation is highlighted.
8.2.8
The transducer is moved distally to the bifurcation area.
is placed at the tip of the flow divider (Section 6.3.3}.
arterial interfaces are optimized at this site and angle.
8.2.9
The computer monitor indicates RIGHT BIFURCATION OPTIMAT0. The
sonographer optimizes the arterial interfaces at this site, and when
the best possible image is obtained as outlined in Sections 6.1 and
6.2.4, simultaneously
states "SELECT" (or "TONE"), presses the
"SELECT" footswitch, and holds the image for at least five cardiac
cycles, marking the site On video tap~.
8.2.±o
by verifying
that
The cursor
The
The program automatically
advances to RIGHT INTERNAL OPTIMAT. The
sonographer confirms advancement of the program by verifying that
Right Internal Optimal is highlighted.
8.2.11
The transducer is moved distally
the internal carotid artery.
8.2.12
The computer monitor indicates RIGHT INTERNAL OPTIM~T.. The cursor
is placed into the correct position at the tip of the flow
divider as discussed in Section 6.3.4. The sonographer
optimizes
the far wall arterial interfaces.
When the best possible image,
as outlined in Sections 6.2.2 and 6.2.5, are obtained, the
sonographer
simultaneously
states "SELECT" (or "TONE"), presses
the SELECT footswitch, and holds the image for at least five
cardiac cycles, marking the site on video tape.
8.2.13
The program automatically advances to RIGHT BIFURCATION FAR W~T.~..
The sonographer confirms advancement of the program by verifying
that Right Bifurcation Far Wall is highlighted.
8.2.14
The computer monitor indicates RIGHT BIFURCATION FAR WALT.. The
transducer is moved back to the bifurcation area to obtain an
image of the bifurcation
at the optimal angle. The cursor is
placed at the tip of the flow divider (Section 6.3.3). The
transducer is slowly tilted along the arterial axis so that the
far wall of the bifurcation becomes vertical in the center of the
display screen. The sonographer
optimizes the intima-media
interfaces on the far wall. During this maneuver, the near wall
echoes will deteriorate.
When the far wall interface echoes are
optimized, as outlined in Section 6.2.6.1, the sonographer
simultaneously
states "SELECT" (or "TONE"), presses the SELECT
footswitch, and holds the image for at least five cardiac cycles,
marking the site on video tape.
ARIC PROTOCOL
6A.
Ultrasound
to the proximal
Scanning - Visit 4.
Version 4.0
centimeter
08/97
of