ATS 570 Інструкція з експлуатації - Сторінка 2
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Section
Introduction
Tissue-mimicking phantoms are used to evaluate the performance of diagnostic ultrasound imaging systems. The
phantoms mimic the acoustic properties of human tissue and provide target structures within the simulated
environment. They are essential to detect the performance changes that occur through normal aging and
deterioration of system components. Routine equipment performance monitoring can reduce the number of
repeat examinations, the duration of examinations, and maintenance time. Phantoms are employed in the areas
of; Clinical Quality Assurance, Preventative Maintenance Programs, Field Service Testing, Research and
Development, Manufacturing, Teaching and Sales & Marketing.
Sound Velocity of Rubber based TM Material
The sound velocity of most diagnostic imaging systems is calibrated to 1,540 meters per second (mps), the
assumed average velocity of sound through human soft tissue. The rubber-based tissue-mimicking material used
in the Model 570 has a sound velocity of 1450 m/s when measured at room temperature (22-24°C). The line
targets and anechoic target structures have been physically positioned to compensate for the differences in the
speed of sound, assuring accuracy of measurements.
Effect of Temperature
The acoustic properties of all biologic and non-biologic materials are affected by temperature variations. Most
diagnostic imaging systems and tissue-mimicking phantoms are calibrated at room temperature, commonly
referred to as 23°C. ATS has affixed a thermometer strip to the outside surface of the phantom housing, room
temperature is reflected on the strip, not the interior of the phantom. Therefore, if a rubber-based phantom is
exposed to extreme temperatures for several hours, it will take the equivalent amount of time to reach room
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