When using high-voltage radiography, lead screens are utilized for what purpose?

In high-voltage radiography, lead screens are primarily used for the purpose of improving the quality of the radiographic image by absorbing scatter radiation and enhancing contrast. They serve to provide a clearer image, which is critical in detecting flaws within the material being tested. The lead absorbs scattered radiation that could degrade the image quality, thereby allowing for a more defined contrast between areas of interest and defects.

Using lead screens is indeed a common practice for almost all exposures in high-voltage radiography, as they help produce a more precise and interpretable result. While improving image resolution and reducing exposure time can be benefits observed in specific situations, the widespread application of lead screens across various exposures speaks to their importance in ensuring optimal film quality and accuracy in radiographic inspections. This helps radiographers maintain the integrity of their evaluations during the testing process.