Positive and negative differences between ct scanning and bedside scanning

Hello, are you asking about the difference between ct scan and bed scan? The positive and negative difference between ct scan and bed scan lies in the different order. There are positive and negative points between ct scanning and bedside scanning, which is caused by the different scanning order during ct scanning. Based on the initial scanning position, when scanning, the diagnostic bed runs from inside to outside, that is, scanning outside the bed, the order will be marked as negative bed, and the bed runs from outside to inside as positive bed, with the same effect.