Can I wear a sponge bra for chest X-ray? Will it be seen?

Yes, X-rays can pass through this substance, which is harmless to physical examination.

Metal materials will have an impact on the results of chest radiographs. It is recommended not to wear underwear with rims as much as possible. If you wear underwear with rims, doctors with clinical experience can generally recognize it, and it won't have much impact. Consider wearing a bra without rims.

Chest X-ray fluoroscopy is a common X-ray examination method. It uses the characteristics of X-ray's penetrability, fluorescence and photographic effect to make the human body form an image on the screen. Because the density and thickness of human tissues are different, when X-rays penetrate different tissues of human body, the X-rays are absorbed to different degrees, so the amount of X-rays reaching the screen is also different, forming images with different black-and-white contrast.

Steel rims are made of metal, which will affect your grades. Sponge bras don't. X-rays can pass through without affecting the results or being seen.