Cerebral hemorrhage is currently a relatively crude method if you rely solely on CT for the calculation. The calculation is done by selecting the site of the brain hemorrhage with the largest dimension, measuring the longest boundary at both ends, and the longest boundary on the vertical line, then multiplying the dimension and dividing by two, which is only an estimate and can estimate about 20-30 ml, etc. For more precise calculations, a series of other 3D reconstructions are needed and are performed with the assistance of a computer. However, at present, because cerebral hemorrhage is a relatively urgent process, it can only be treated by an estimation, and if it exceeds 30 ml and produces brain herniation, dilated pupils, coma and some other conditions, surgery is needed for treatment. Therefore, for the current cerebral hemorrhage, the sooner the relevant volume is estimated, the faster the surgery is the best treatment.