Change: Moved by AndyC Feb 8 2010, 7:33 AM EST

Change: abonormalabnormal opacity demonstrated in the left upper chest. There is loss of visualistaionvisualistion of the upper mediastinum on the leftThere is evidence of compensatory emphysema on the leftThere is evidence of narrowing of the trachea from extrinsic compression on the leftAppearances are suggestive   View changes from previous version. (Word count: 598)

Change: Unlike RUL collapse, there is no sharply defined border- the abnormal increase in lung density merges into the normal lung below. The incease in lung density can be almost imperceptible on the PA view. The aortic knob is often obliterated. Similarly, the upper left cardiac shadow can be obliterated.The   View changes from previous version. (Word count: 504)

Change: More information on lung anatomy herePlain Film Appearance The PA view will show an area of increased opacity in the left upper lobe with an ill-defined margin. The PA view will shows an area of increased opacity in the left upper lobe with an ill-defined margin.Note the   View changes from previous version. (Word count: 353)

Change: mediastinal shift The lateral view is usually definitive and often highly characteristic. As the LUL collapses, the fissure moves forward pivoting at its lowest point The lateral view demonstrates the highly characteristic collapsed lobe which now lies parallel to the sternum ... back to the Applied Radiography home page   View changes from previous version. (Word count: 241)

Change: collpasecollapse in the same manner as the right upper lobe. This is a legacy of anatomy. There is no middle lobe on the left- the equivalent of the RML on the left is the lingula segment of the LUL.Important Characteristics of all Lobar Collapse 1.Collapse and   View changes from previous version. (Word count: 234)

Change: Left Upper Lobe (LUL) Collapse   View changes from previous version. (Word count: 5)