In clinical practice, the performance of subdural hematoma CT is generally a crescent-shaped high-density image, which is the most common and typical imaging performance, but it must also be noted that many patients may show some different imaging results on CT because of the mechanism of injury and the time of overall performance, and must clarify their own relevant circumstances, for example, some relatively small or very light, then For example, if the subdural hematoma is relatively small or very mild, then it is possible that the subdural hematoma is only a linear manifestation, but of course it is also a high-density image. For some chronic subdural hematomas, they are not necessarily high density, but are likely to be mixed density or even low density, so they must be judged by a medical professional to be meaningful.