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| Near Field Ultrasound Phantom. |
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The CIRS series of ultrasound phantoms, unlike human subjects or random scannable materials, offers a reliable medium
which contains specific, known test objects for repeatable qualitative assessment of ultrasound scanner performance over
time.At normal or room temperatures the Zerdine® (1) material found in the Near Field phantom will accurately simulate the ultrasound characteristics found in human tissue. The Model 050 has a series of wire targets that will appear as bright dots or lines on the ultrasound image. These targets are made from stainless steel with a diameter of 0.1 mm. There are also two known volumes, a 10 mm combination cyst-like/hyperechoic mass and anechoic focal lesions embedded within the phantom. These “masses” are made from Zerdine® that has a different contrast and attenuation relative to the background material. The Model 050 was designed to allow for assessment of uniformity, dead zone, depth of penetration, beam profile/focal zone/lateral response width, vertical distance measurement accuracy, axial resolution, lateral resolution, anechoic masses, high contrast masses, volumetric measurement accuracy, and focal lesion detectability. |
| (1) US PATENT# 5196343 Material:
Zerdine® 1 solid elastic water-based polymer. Freezing Point: 0°C Melting Point: Above 100°C Attenuation Coefficient: 0.50 dB/cm-MHz Velocity of Sound Through Background Medium: 1540 m/s ± 10 m/s Scanning Well: 6.5" X 3.9" X 0.6" (165mm X 100mm X 15mm) Scanning Membrane: Saran-based laminate. Targets:
Material: Stainless Steel Wire Diameter: 0.1mm Vertical Plane Targets:
Depth Range: 8cm Spacing: 1cm |  |
| Axial Resolution Targets:
Number of Arrays: 2 Depths: 1.5cm and 2cm Axial Intervals: 0.5, 1, 2, 3, 4, and 5mm Horizontal Intervals: 1, 2, 3, 4, and 5mm Ring Down Target:
1mm to 10mm Volumetric Test Object:
Calibrated asymmetric shape 7cc and 21cc Spherical Cysts:
Diameter: 5mm, 3mm Random Distribution High Contrast/Cystic:
Cylinder Diameter: 10mm Depth: 1.0cm Contrast: Hyperechoic/Cyst-like |
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