1. TM material sound speed: 1540 ± 10m/s (23 ± 3 ℃)
2. TM material sound attenuation coefficient slope: 0.70 ± 0.05dB/cm/MHz (23 ± 3 ℃)
3. Nylon target wire diameter: 0.3 ± 0.05mm
4. Nylon target line position tolerance: ± 0.1mm
Axial lateral resolution target group: its lateral branches are 30, 50, 70120, and 160mm away from the sound window, respectively,
Blind spot target group: The horizontal spacing between adjacent target lines is 10mm, and the distances to the sound window are 10, 9, 8, 7, 6, 5, 4, and 3mm, respectively.
Longitudinal target group: A total of 19 target lines, with a center distance of 10mm between adjacent lines.
Horizontal target group: A total of 7 target lines, with a center distance of 20mm between adjacent lines.
Simulated lesion: Simulated tumor, located at a depth of 70-80mm, cylindrical in shape with a diameter of 10mm, with the column axis parallel to the target line.
Imitation capsule and stone, with a cylindrical shape and a diameter of 10mm, located at a depth of 70-80mm, with an axial direction parallel to the target line. The imitation stone is irregularly shaped and located in the waist of the sac, with a maximum size of approximately 4-6 mm. Imitation capsule structure, cylindrical in shape, with a diameter of 6mm, the column axis parallel to the target line, located at a depth of 47-53mm.
