Dual source CT means the same machine has two x-ray systems and two bulb tubes, usually Siemens is this kind of structure. The advantages are obviously very good scanning time and so on, but the disadvantages are also very obvious. If the damage to the repair is troublesome and expensive, because it is more than the average machine has an extra system, so relatively speaking, the chance of error is also very large.
128CT refers to the number of layers or rows of CT, because of domestic advertising, deliberately confusing the difference between the number of rows and layers, so you have this 128CT I do not know whether it is 128 layers or 128 rows.