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SIMULTANEOUS FRONTAL AND LATERAL CHEST ROENTGENOGRAMS ON LOW BIRTH WEIGHT INFANTS

HERMAN GROSSMAN M.D., PATRICIA H. WINCHESTER M.D., and PETER A. AULD M.D.

1. A method for obtaining simultaneous frontal and lateral (biplane chest) roentgenograms in the premature or full term infant is described.

2. Evaluation of chest volume and heart size is more accurate when the respiratory cycle is the same in frontal and lateral projections.

3. The limitation of frontal roentgenograms alone is accentuated by the evaluation of simultaneous lateral views. The level of the diaphragm in relation to the posterior ribs was shown to be unreliable in estimation of the degree of aeration of the lungs.

4. True lateral chest roentgenograms are obtained because the patient is supine and the x-ray beam is directed horizontally.

5. Radiation scatter on the film is reduced by the use of an 8:1 grid or 0.0015 inch alloy foil filter.

6. The radiation dose to the infant using simultaneous exposures with or without the lead alloy foil is the same as that delivered in sequential frontal and lateral roentgenograms. The amount received is slightly more when the 8:1 grid is used.


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