■ WS 76-2020 “Medical X-ray diagnostic equipment quality control test specification”.
Technical Parameters
■ This module contains 21 discs of 13mm diameter, 10mm diameter, 7mm diameter, 4mm diameter, each, in the case of 70kV ray quality, produce approximate contrast including: 20.0%, 18.0%, 16.0%, 14.5%, 12.3%, 10.8%, 8.6%, 7.6%, 6.6%, 5.5%, 4.5%, 4.0%, 3.9%, 3.3%, 2.7%, 2.3%, 2.0%, 1.8%, 1.4%, 1.0%, 0.8%;
■ Material: AL.
