What is the purpose of the raised button on a radiograph?

The raised button on a radiograph serves as a tactile marker that aids in distinguishing left from right on the image. This feature is particularly important in radiology, where accurate orientation is crucial for diagnosis and treatment planning. It helps avoid confusion that can arise when interpreting images, ensuring that medical staff can accurately communicate the findings and implications of a particular study. By providing a clear differentiation between anatomical sides, the raised button strengthens the clarity and utility of the radiographic information.

Other options, while related to radiographic procedures, do not accurately describe the primary function of the raised button. For instance, date of exposure, film type, and alignment during exposure are typically denoted by other means, such as labels or exposure indicators, rather than a tactile marker like the raised button.