➀, with different radiation absorption, 7 steps ascending: 0.00, 0.30, 0.65. 1.00, 1.40, 1.85 and 2.3 mm Cu, for controlling the dynamic range Low contrast objects, made of aluminium disks
➁, with a diameter of 10 mm, producing a contrast of 0.8 %, 1.2 %, 2.0 %, 2.8 % , 4.0 % and 5.6 % at 70 kV, for determination of contrast resolution Resolution test (lead foil)
➂, 0.6 – 5.0 lp/mm, 45° rotated, for checking spatial resolution Marked areas for signal standarization and homogenity check
➃Alignment marks for different cassette sizes
北京华瑞森科技发展有限公司
BeijingHuaruison Technology Development Co.Ltd.,
北京通州区通州工业开发区光华路16号方和正圆大厦A座2楼
Address: 2F,Building A,No.16 Guanghua Road,Tongzhou Industrial Development Zone, Tongzhou District, Beijing,101113 China