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…showed last 75 words of 487 total…vein in your arm, you will then be scheduled to return beetween 2 and 5 days later, depending on your diagnosis. Your initial scan can take several hours, while you lay on a stretcher, or imaging table, and a camera is positioned above you or below you, taking pictures as it moves slowely along the length of your body. No special preperation must be taken before the scan, and the gallium is usually excreted through the bowel.