Final answer:
Decreasing the Display Field of View (DFOV) in a CT scan would increase the magnification of the image on the monitor, showing a smaller area of the patient's body in greater detail, though it does not alter the resolution of the CT scan itself.
Step-by-step explanation:
The Display Field of View (DFOV) is the portion of the patient that is represented on the CT scan image that is displayed on the monitor. Decreasing the DFOV would increase the magnification of the CT image on the display monitor. This means that a smaller area of the patient's body is shown, but it is displayed in greater detail. With an increased magnification, the structures within the DFOV appear larger, which may assist radiologists and other medical professionals in detecting and diagnosing smaller lesions or abnormalities. However, it is essential to note that decreasing the DFOV does not change the resolution of the CT scan itself; it only affects how the image is exhibited on the monitor and potentially may lead to more detailed observation in the smaller visualized area.