Model 465 is based on IEC document 1390, drawing A.1, designed for testing Dynamic range.

It contains 22 steps of 10 mm of solid and cystic material.

The Box is measuring 33 cm * 26 cm * 8,5 cm (w * h * d).

Weight is 10,1 kg.

Practice

The step, scanned through the low attenuation material, at which the echoes are just saturated in the image, should be noted. At the same depth as this step, the position in the scattering material where the echoes are just detectable should be noted, and the number of high attenuation steps through which the beam passed to reach this position counted. Using the known attenuation difference per step between the low and high attenuation material, the displayed dynamic range should be calculated. With a sector scanner, the ultrasonic transducer should be moved laterally to place the central line of the field-of-view perpendicular to the steps at which the just saturated and just detectable echoes are determined.