DR and CT are two different examination methods with different focus and their own advantages, so you cannot generalize which one is better. For example, for fractures, DR diagnosis is better than CT, but for invisible fractures, CT is better, because DR is an overlapping image, the density resolution is not high, easy to miss the diagnosis of relatively small or lesions with little difference in density. While CT belongs to tomography, which greatly improves the density resolution, the radiation of DR is small and low, while the radiation of CT is large and high, so if it is a medical screening or the diagnosis of fracture, it is usually examined with DR first, and CT can be used as a further qualitative examination method after DR examination.