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Multipurpose Phantom ATS 539  The Model 539 Multipurpose phantom is an easy, comprehensive means of evaluating imaging systems with an operating frequency range of 2.25 to 7.5 MHz. Phantom is designed with a combination of monofilament line targets for distance measurements and tissue mimicking target structures of varying sizes and contrasts. Cystic-like target structures are positioned in-line vertically, thereby permitting an entire target group to be displayed in one view. Due to the acoustic similarity of the background material and the target structures, artifacts caused by distortion, shadowing or enhancement have been eliminated. Six gray scale targets ranging in contrast from +15 to -15 dB are provided to evaluate the system’s displayed dynamic range and gray scale processing performance. Model 539   Tests Performed    • Dead Zone or Ring-Down    • Vertical Measurement Calibration    • Horizontal Measurement Calibration    • Sensitivity/Penetration    • Focal Zone    • Axial & Lateral Resolution    • Image Uniformity    • Gray Scale & Displayed Dynamic       Range   Uses:    • Quality Assurance     • Routine Clinical Performance    • In-Process Manufacturing    • Final Q.A. Inspection    • Research & Development    • Teaching   Specifications   General Overall Dimensions 23.4 x 20.5 x 9.5cm* Weight 3.1 Kg* Housing Material PVC Wall Thickness 1.0 cm* Scan Surfaces 4 Scan Surface Dimensions 17.5x7.5 cm* 14.0x7.5 cm*   Tissue Mimicking Material Type Urethane rubber Freezing Point < -40°C Melting Point > 100°C Attenuation Coefficient 0.5 dB/cm/MHz ± 5.0%** Speed of Sound 1450 m/s ±1.0% at 23°   Line Targets Material Monofilament Nylon Diameter 0.12mm ± 5% Position Tolerance ± 0.1 mm Vertical Group Number of Targets 17 Interval Spacing 1.0 cm Depth 1.0 - 18.0 cm Horizontal Group Number of Targets 10 Number of Groups 2 Interval Spacing 2.0 cm Depth Scanning Surface Scanning Surface   #1 5.0 cm #3 5.0 cm Dead Zone Group Number of Targets 9 Lateral Displacement 5.0 mm Interval Spacing 1.0 mm Depth 2.0 - 10.0 mm Axial-Lateral Resolution Group Number of Targets 11 Lateral Displacement 1.0 mm Interval Spacing 5.0, 4.0, 3.0, 2.0, 1.0 mm Depth 7.0, 11.0, 4.0, 16.0 cm   Anechoic Target Structures Type Non-echogenic, cylindrical Positional Tolerance ± 0.1 mm Number of Groups 5 Targets: Group 2, 3, 4 Group 6, 8   17 8 Diameter Tolerance ± 5% Diameter Group 2, 3, 4 Group 6, 8   2.0, 3.0, 4.0 mm 6.0, 8.0 mm Interval Spacing (center to center) Group 2, 3, 4 Group 6, 8   cm1.0 2.0 cm Depth 1.0 - 17.0 cm   Gray Scale Target Structures Type Echogenic, Cylindrical Number of Targets 6 Diameters 15.0 mm Interval Spacing (center to center) 2.0 cm Depth 4.0 cm Contrast relative to background material (dB) +15,+6, +3,-3,-6, -15 *Nominal dimensions **Other attenuations are available upon request **Lifetime Warranty** Carrying Case & Built-in Scan Wells Included.

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