Thoracic Imaging

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  1. Oesophageal Foreign Body
    In the thorax; a local non-homogenous midline opacity causing oesphageal dilation.

    See the hypaxial muscular edge, trachea deviating ventrally.
  2. Cranial Mediastinal Mass
    Homogenous soft tissue opacity mass causing thickening of the cranial mediastinum so that it is wider than the adjacent body wall.

    Loss of cardiac silhouette cranially.

    Trachea will be displaced (focally deviated)
  3. Pulmonary metastasis
    Pale lung with multiple smooth walled, discrete soft-tissue opaque nodules.

    Non-specific interstitial nodular pattern

    Metastasis DONT MINERALISE
  4. Megaoesophagus
    Oesophagus is dilated with air => trachea deviates ventrally from its normal course and can see the hypaxial muscles under the spine.

    DV view- V shape of the oesophagus over the heart as it decreases in size to get through the diaphragm
  5. Megaoesphagus with aspiration pneumonia
    • Same as for megaoesophagus plus;
    • Increased opacity in the ventral lung, loss of cardiac silhouette.

    Blackened airways against the solid opacity in the lungs- "trees in the fog" air bronchograms
  6. Cardiomegaly with LA enlargement
    Heart takes up >50% of the thorax causing deviation of the trachea towards the spine.

    • Enlarged LA;
    • on the lateral view appears as a caudodorsal protrusion on the cardiac silhouette.
    • on the DV view the enlarged LA summates to make an area of increased opacity in the middle of the cardiac silhouette.

    • Left auricle enlargement;
    • causes a bilateral bulge in the cardiac silhouette on DV view.
  7. Cardiomegaly with LA elargement and pulmonary oedema
    same as for cardiomegaly with LA enlargment plus;

    caudodorsal increased lung opacity (homogenous caudodorsal infiltrates)
  8. Pleural effusion
    Not much aerated lung and the lung edges are rounded

    Fluid opacity outside of the lungs

    Lung retracted away from the inside of the ribs

    Pleural fissure lines- fluid dissects between lungs lobes (VD view)

    Loss of cardiac silhouette
  9. Pneumothorax
    Lung is retracted away from the body wall. Lung is contracted down therefore is increased opacity and has sharply demarcated smooth margins.

    Radiolucency outside of the lungs (air). Can see lung lobation

    Look at dorsal body wall- this is the first location that pneumothorax is seen
  10. Primary pulmonary tumour
    A single discrete lung opacity ~ medium sized

    Soft tissue opaque, kind of round, NO trees in the fog.
  11. Bronchopneumonia (alveolar disease)
    Lung is consolidated (increased opacity) ventrally.

    Blackened airways against the solid opacity of the lung- "trees in the fog"- air bronchograms

    Lobar sign over the heart- between diseased and normal lung lobes.
  12. Airway pattern (bronchial pattern)
    Bronchial wall thickening (peripherally) "Donuts and Tramlines"

    Air in alveoli and air in airway lumen => lung is predominantly radiolucent (may be some interstitial haze)

    Madonna bra- collapsed right middle lung lobe.
  13. Pericardial effusion
    Globoid enlargement of the heart

    Lungs look normal (unless it has progressed to right-sided heart failure)

    Can't really see the heart- can see the edge of the pericardial sac.
Card Set:
Thoracic Imaging
2013-01-19 21:41:54
thoracic imaging

thoracic imaging diagnosis
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