Final answer:
Energy subtraction in digital fluoroscopy is less affected by motion artifact than temporal subtraction because it reduces image blurring from movement, leading to clearer diagnostic images.
Step-by-step explanation:
Energy subtraction, as used in digital fluoroscopy, exhibits less motion artifact compared to temporal subtraction. Motion artifacts can significantly degrade the quality of medical images, leading to poorer diagnostic accuracy. Energy subtraction makes use of the differences in energy absorption characteristics of various body tissues when exposed to radiation.
By applying energy-sensitivity techniques, this method can reduce the blurring effect caused by the movement of the patient or internal organs, resulting in clearer images, especially in cardiovascular studies where motion is a significant concern. In contrast, temporal subtraction, which relies on comparing images taken at different times, can struggle with aligning images accurately if there is any motion, thus giving rise to motion artifacts. In summary, energy subtraction offers a way to mitigate image degradation due to patient or organ movement, leading to higher quality diagnostic images.