Display Field Of View (DFOV) is a key element in the resolution of the Computed Tomography (CT) images. DFOV determines how much of the scan field of view is reconstructed into an image. DFOV can be less than or equal to the Scan Field Of View (SFOV) but cannot be more than the SFOV.
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Scan Field Of View (SFOV) is the parameter that determines how much anatomy is scanned.