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A whole-body image of the patient injected with FDG is acquired by moving the bed through the scanner in discrete overlapping steps (a), typically covering the range from base of brain to thighs in 5 to 7 bed positions depending on the height of the patient. The acquired image (b) then shows the use of glucose in all organs throughout the body. A tumor would appear as a region of abnormal uptake, as shown for this patient at the apex of the lung (arrowed).
