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INSTRUCTIONS FOR USE
HANDLING AND CARE
For best results the phantom should be kept clean at all times and stored at room
temperature. In particular a build-up of dried coupling gel on the scan surface
should be avoided. The phantom may be cleaned with warm water using a lint free
cloth. Particularly stubborn stains and dirt may be removed with a mild household
cleaner. The use of petroleum solvents should be avoided since they may adversely
react with the rubber-based material.
GENERAL GUIDELINES FOR PERFORMING MEASUREMENTS
To evaluate the performance of diagnostic ultrasound imaging systems, the Model
ATS539 has a combination of monolament line targets and tissue-mimicking cylin-
drical targets of varying sizes and contrasts.
The following are general steps for imaging all targets:
• Some wires will appear as short lines rather than dots. When using the
electronic calipers, always take measurements from a point on one echo
to the same point on the next (i.e., center to center). Otherwise, errors may
be introduced.
• If a convex probe is used, center the target within the scan plane in order to
minimize degradation and distortion introduced on the outer edges of the
probe.
• When assessing vertical distance measurements, DO NOT press on the
scanning surface. Pressure on the scanning surface causes the wires
to become temporarily displaced, making vertical distance measure-
ments inaccurate.
• When assessing horizontal distance accuracy, ensure that the scan plane is
perpendicular to the horizontal target group. Rotation of the probe will result
in inaccurate distances.
• Always be sure the phantom is scanned while at room temperature. A
phantom just received may be colder or hotter than room temperature de-
pending on where it was stored during shipping. Temperature affects the
speed of sound and, ultimately, the perceived measurements. The phantom
should be stored at room temperature for at least 24 hours before use to
ensure its core temperature is correct.
• The most accurate measurements will be made with the phantom 22˚C ±
1˚C (70˚F–73˚F).
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