X-ray fluoroscopy is based on the density of objects?

Basic principles of X-ray imaging

The reason why X-rays can make human tissues form images on the screen or film is based on the penetrability, fluorescence effect and photosensitive effect of X-rays. On the other hand, it is based on the difference in density and thickness between human tissues. When X-rays pass through different tissues and structures of human body, the absorption degree is different, so the amount of X-rays reaching the screen or film is also different. In this way, images with different light and dark or black and white contrast are formed on the screen or X-ray film.

DR imaging technology is a narrow sense of direct digital photography, that is, DDR(DirectDigit Radiography) or DR(direct radiography), which usually refers to the use of electronic imaging board technology-FPD Technique.

The composition of DR detection system can be simply expressed as: X-ray source, detection object, X-ray imaging detector, image digitization system and digital image processing system.

DR is a general term, including all kinds of digital radiography technology, and of course industrial nondestructive testing imaging.