You are performing a portable AP chest projection on a large patient. The image receptor is placed landscape behind the patient and a 46-inch SID is measured. It appears as though pertinent anatomy will not be included if the exposure is made with the patient and tube positioned as is. What changes can be made to include all anatomy of interest?
A. Place the image receptor portrait rather than landscape
B. Increase the SID to 72 inches
C. Open the collimators (increase the size of the light field)
D. Expose patient without making any changes
Answer: B
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