What is a common method for testing image contrast?

Using standardized test objects is a common method for testing image contrast because these objects, often referred to as phantoms or test patterns, have known properties and densities that allow for objective measurement of contrast in radiographic images. These test objects can provide consistent results across different imaging systems and conditions, enabling technicians to assess the ability of the imaging equipment to distinguish between different shades of gray. By analyzing the images produced with these standardized test objects, one can determine how well the system can differentiate between various levels of exposure and thus assess its contrast performance.

This method is particularly valuable because it allows for repeatable and quantifiable assessments, ensuring that the imaging equipment is functioning optimally and producing images that meet clinical standards.