More black sign – an important normal lateral chest x-ray…


Normal = more black sign


Lower lobe pneumomia

More black sign – an important normal lateral chest x-ray finding (left image). It refers to the gradual increase in radiolucency (blackness) of the vertebral bodies when proceeding from upper to lower chest due to an increasing proportion of air. When air is replaced by higher attenuation material, such as in lower lobe consolidation (right image), then the lower vertebral bodies become abnormally radiodense (white).

from our tumblr blog: http://radiologysigns.tumblr.com/post/23274370027

http://radiologysigns.tumblr.com/

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