9
Pin targets are resolved axially if an imaginary horizontal line can be drawn between the
targets without touching either target. The targets on the left are not resolved. The targets
on the right are resolved.
Examine the other resolution target groups and compare the resolution at various depths.
Axial resolution may change with depth.
7.
Scan the nearest cystic target group. Each target should be round with a clean black
appearance and well defined edges. Bright specular echoes at the top and bottom of the
targets are normal.
Unresolved
Resolved
Measure the dimensions of the 4 mm cystic target to check the image geometry. Use the
calipers to measure from top to bottom and side to side. Repeat with the other cystic target
groups as part of the cyst imaging test.
8.
Decrease image depth to the minimum and examine the dead zone target group. The
dead zone targets can be used to measure lateral resolution in the extreme near field of
the transducer.
Note:
The highest dead zone pin you can see should be the point of reference for
all measurements – not the scanning surface.
Summary of Contents for 1425A
Page 26: ...26 Notes...
Page 27: ...27 Notes...
