The PA (posterior-anterior) film is obtained with the patient facing the cassette and the x-ray tube 6 feet away. This distance diminishes the magnification of structures closer to the x-ray tube. Heart is close to normal size as possible.
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crossfoot definition. A word that means to add column totals across to see if the sum will equal the grand total. In the table below each of the columns A through Total was footed (added or summed) in order to get each column's total. Note that Total column contains the total amount for each item. To crossfoot means to add the totals shown in Columns A + B + C to verify that it sums to the total of Total column.