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Replace the X ray grid for Philips

A new study published shows that the droplets produced by speech can be suspended in the air of a closed space for more than ten minutes, which highlights the “important role” of voice transmission in the transmission of new coronaviruses.
According to Agence France-Presse, a team of researchers from the National Institute of Diabetes, Digestive and Kidney Diseases (NIDDK) asked the people under test to repeat the phrase “keep healthy” in a closed box for 25 seconds. The laser light projected into the box illuminates the droplets, allowing them to be seen and counted.
The research was published in the latest issue of the Proceedings of the National Academy of Sciences (PNAS). Studies have shown that droplets of saliva produced by speech stay in the air for an average of 12 minutes.
Taking into account the known concentration of new coronavirus in saliva, scientists estimate that speaking loudly every minute can produce more than 1,000 droplets containing the virus, able to stay in an enclosed space for 8 minutes or more.
The researchers concluded: “This direct visualization shows how normal speech produces droplets in the air, which can float for a few minutes or more and are very capable of spreading viruses in a limited space.”
The research team published another study in the New England Journal of Medicine in April that showed that the lower the voice, the fewer droplets produced.
If the infectious level of the new coronavirus can be confirmed by voice, it can scientifically encourage many countries to recommend that people wear masks and help explain the rapid spread of the virus.

Isn’t everyone familiar with the term grid? In simple terms, the grid is used to filter the scattered scattered rays. Where is the grid installed? Since the wire grid is for filtering rays, the installation must be related to the X-ray equipment. Such as under X-ray machine tool, on the film frame and on the image intensifier.

Recently, a customer asked about the Philips  x ray grid. The grid provided by the customer is a grid of paper-based carbon cover plates used on the DR flat panel detector. Such a grid is very rare to tell the truth, because Most customers use Korean JPI grids, but why not use paper-based grids? Because the paper-based wire grid is expensive, the paper-based board is easy to break, the life is short, and the cost performance is worse than that of the aluminum-based filter. If only looking at the effect of taking pictures, there is no difference between the aluminum base and the paper base, the parameters of the X-ray machine can be adjusted, unless the parameters of the X-ray machine itself are relatively fixed, it is not easy to adjust.



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