How to choose the appropriate parameter X ray grid?

From 0 to 24 May on May 16, there was one new case of asymptomatic infection in the province (Changchun City). As of 24:00 on May 16, the province has reported a total of 10 cases of asymptomatic infections (6 imports), of which 4 cases have been corrected as confirmed cases, 1 case was released from quarantine medical observation, and 5 cases are currently asymptomatic infections.
Case 1, male, born in 1987, was a close contact with Case 2 diagnosed in Fengman District of Jilin City notified by Jilin Province on May 13. Through close contact, they actively screened for positive nucleic acid test, and were diagnosed as a confirmed case by the expert group consultation on May 16.
Case 2, female, born in 1935, is related to the confirmed case 3 in Fengman District of Jilin City notified by Jilin Province on May 11. Through active screening, the nucleic acid test was positive and was diagnosed as a confirmed case by the expert group consultation on May 16.
Case 3, female, born in 1992, was a close contact with a confirmed case reported in Fengman District, Jilin City, which was reported on May 14 by Jilin Province. Through close contact, they actively screened for positive nucleic acid test, and were diagnosed as a confirmed case by the expert group consultation on May 16.
Remind the general public that the current situation of “external defense input, internal defense rebound” is still grim. It is necessary to further increase awareness of prevention, do personal protection and protect the health of yourself and your family. Once acute respiratory symptoms such as fever and cough occur, you should go to a local designated medical institution to get a fever clinic in time.

Recently, a lot of customers asked about the X ray grid, but many customers do n’t understand what a grid is. Simply put, the grid is to filter the messy scattered rays. With the X ray grid, the image will be better, but the filter How to buy the grid? Normally, the parameters of the wire grid are composed of size, grid ratio, grid density and focal length. Therefore, users need to provide specific parameters such as size, grid ratio, grid density and focal length. For example, the filter grid commonly used on the film frame is a parameter, and the size is 15 * 18 or 18 * 18. The grid ratio is 10: 1, the grid density is 103L / in, and the focal length is 1.8 meters. This is the parameter of the ordinary grid, of course, we can also accept customization. If you need it, please call us.

Author：Jamy