A radiograph shows appropriate exposure but significant motion blur. If the original technique used was 100 mA and 0.5 seconds (s), what new technique will minimize motion artifacts while maintaining exposure?

To minimize motion blur in a radiograph while maintaining appropriate exposure levels, it is essential to consider the relationship between milliampere-seconds (mAs) and exposure time. The original technique used 100 mA for 0.5 seconds, resulting in a total mAs of 50 (100 mA × 0.5 s = 50 mAs).

When motion blur occurs, reducing the exposure time is effective, as motion blur is generally correlated with longer exposure times. By decreasing the exposure time while increasing the mA to compensate, the overall exposure (in mAs) can remain the same, preventing underexposure while minimizing the risk of motion artifacts.

The correct choice involves increasing the mA to 500, which leads to a total of 50 mAs when paired with a reduced exposure time of 0.1 seconds (500 mA × 0.1 s = 50 mAs). This adjustment reduces the time that the film or detector is exposed to any motion, significantly diminishing blur without sacrificing image quality due to underexposure.

The other options do not provide the same sensitivity to motion. For instance, reducing the mA to 50 while increasing the exposure time to 1.0 second