When comparing a portable chest radiograph taken in an intensive care unit bed with one taken with the patient upright in the radiology department, one significant difference is that the
a. portable chest radiograph is usually clearer.
b. one in the intensive care unit is considered a posterior view.
c. portable chest radiograph magnifies some thoracic structures and decreases the sharpness of the structures.
d. departmental chest radiograph enlarges some thoracic structures.
C
In the supine radiograph with the patient lying flat on the bed, the x-ray tube can be only approximately 36 inches from the patient's chest because of ceiling height and x-ray equipment construction. This results in a lower quality film from a diagnostic standpoint because the images of the heart and great vessels are magnified and are not as sharply defined.
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