What does the latitude of a radiograph indicate?

The latitude of a radiograph refers to the range of thicknesses or material densities over which satisfactory densities are obtained in the film or digital image. This concept is vital in radiographic testing as it determines how much variation in material thickness can be effectively imaged while still producing a usable, clear radiograph. A wider latitude allows for greater flexibility in interpreting the radiographic image, as it implies that both thinner and thicker sections of the material can show acceptable density levels, making it easier to identify defects or anomalies in the material.

Understanding the latitude informs radiographers how to adjust exposure parameters and how the type of material being tested may influence the quality and readability of the radiograph. It helps in discerning the effectiveness of the radiographic technique being applied and aids in making decisions regarding additional testing if necessary.