.

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Note added at 5 mins (2010-10-20 12:28:47 GMT)
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The light lung fields and the small pulmonary arteries are most important signs of this. In contrast, the dense lung fields with increasedvascular markings ...
heart.bmj.com/content/13/4/438.full.pdf

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Note added at 9 mins (2010-10-20 12:32:54 GMT)
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The relief of many cases of cyanotic congenital heart disease by a systemic-pulmonaryanastomosis (Blalock and Taussig, 1945) has emphasized the importance of a diminished blood flowto the lungs. The light lung fields and the small pulmonary arteries are most important signs ofthis. In contrast, the dense lung fields with increasedvascular markings and with visible pulsationin the pulmonary arteries and their'branches, well known as characteristic of atrial septal defect,suggest an increased blood flow to the lungs.
http://webcache.googleusercontent.com/search?q=cache:EI-Pe5s...


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Note added at 12 mins (2010-10-20 12:35:34 GMT)
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И, видимо, можно также clear вместо light
Chest x-ray films showed small but clear lung fields, or basal atelectasis, with diaphragmatic elevation. No evidence of major parenchymal lung or pleural disease was found on the computerized tomography scan.
http://grande.nal.usda.gov/ibids/index.php?mode2=detail&orig...

or
transparent/clear pulmonary fields

Radiography of the chest revealed transparent lung fields,...
linkinghub.elsevier.com/retrieve/pii/0002870368902366