Pulmonary Patterns, Localization, Pleural Space Flashcards
Lung Pattern? Where is the hilus?
Normal lungs
Lung Pattern? Where is the hilus?
Normal lungs
What are characteristics of a bronchial lung pattern?
End on: thick rings, lucent in center
Long axis: paired thick lines, seen more peripherally, thinner than vessels
Doughnuts and tramtracks
Lung Pattern?
Bronchial
Lung Pattern?
Bronchial
Lung Pattern?
Bronchial
Lung Pattern?
Bronchial
Lung Pattern?
Normal lung
Lung Pattern?
Bronchial
Lung Pattern?
Bronchial
Lung Pattern?
Bronchial
Lung Pattern?
Bronchial
What is the mechanism of the bronchial lung pattern?
Thickening of airways usually due to chronic inflammation
What are causes of a bronchial lung pattern?
Allergic/immune-mediated airway disease
Chronic/previous inflammation
Infection
What are the characteristics of an alveolar lung pattern?
Soft tissue opaque lung region with at least one of the following: air bronchogram +/- lobar sign +/- border effacement with soft tissues
What is the appearance of an air bronchogram?
Lucent airways with surrounding soft tissue opacity
All regional vessels are border effaced
Lung Pattern?
Alveolar
Air bronchogram
Lung Pattern?
Alveolar
Air bronchogram
What is the appearance of a lobar sign?
Distinct smooth soft tissue opaque margin
At edge of lobe, adjacent to normal lung
Lung Pattern?
Alveolar
Lobar sign
Lung Pattern?
Alveolar
Lobar sign
What is the appearance of border effacement?
Lose visibility of margins of cardiac silhouette, diaphragm, etc.
Lung Pattern?
Alveolar
Border effacement
What are causes of an alveolar lung pattern?
Edema (cardiogenic or noncardiogenic pulmonary edema)
Blood (trauma, coagulopathy)
Pus (pneumonia, inflammatory)
Neoplasia (primary lung tumor, metastatic neoplasia)
Atelectasis
What are characteristics of an interstitial pattern?
Increased background opacity of the lung (not as severe as alveolar - not meeting any of the 3 criteria)
Large pulmonary vessels visible but fuzzy
Lung Pattern?
Interstitial
Diffuse, marked
Lung Pattern?
Normal lung
Lung Pattern?
Right-sided interstitial
Lung Pattern?
Interstitial
Diffuse, marked
Lung Pattern?
Interstitial
Diffuse, marked
Lung Pattern?
Interstitial
Diffuse, moderate
Lung Pattern?
Normal
Lung Pattern?
Interstitial
Diffuse, moderate
Lung Pattern?
Normal
Lung Pattern?
Interstitial
Diffuse, moderate
Normal lung
What are special considerations for interstitial lung patterns?
Stuff in interstitial space
Blood: leptospirosis
Neoplasia: lymphoma
Fibrosis
Lung Pattern?
Vascular
Big arteries and veins, solid tubes
Lung Pattern?
Bronchial
Hollow tubes
Lung Pattern?
Alveolar
Lung Pattern?
Interstitial
What are radiographic features of underexpansion/atelectasis?
Interstitial or alveolar lung pattern with decreased lung volume
Can be one lobe, one region, or entirely of lungs
Lung Pattern?
Atelectasis
Red = alveolar pattern
Lung Pattern?
Atelectasis
Caudodorsal interstitial pattern
Lung Pattern?
Atelectasis
Moderate caudodorsal interstitial pattern
Which lung is seen better with which view?
Up lung shows lesion better
Right lateral shows left lung better
When should a DV view be used?
Dyspneic
Better view of dorsal lungs and pulmonary vessels
Right middle lung lobe
Which lung lobe is the mass?
What is highlighted?
Pleural fissure lines
What is the appearance of pleural effusion on radiographs?
Widened pleural fissure lines
Lungs retracted and rounded
Lung Pattern?
Pleural effusion
Lung Pattern?
Moderate right-sided pleural effusion
Pleural effusion
Pleural effusion
What lung patterns are associated with pleural effusion?
Interstitial due to underexpansion or superimposition with soft tissue opaque fluid
Alveolar if atelectasis
Lung Pattern?
Pleural effusion
Lung Pattern?
Pleural effusion
Lung Pattern?
Mild pleural effusion
Lung Pattern?
Marked pleural effusion
How does pleural effusion differ with a VD and DV view?
DV: fluid to ventral thorax, heart more easily border effaced by fluid on this side
VD: fluid to dorsal thorax, easier to see pleural fissue lines
What does pneumothorax look like on radiographs?
Free gas around retracted lung margins
Lack of vessels in gas-filled pleural space
Lung Pattern?
Pneumothorax
Lung Pattern?
Pneumothorax
Lung Pattern?
Pneumothorax
Lung Pattern?
Pneumothorax
Lung Pattern?
Pneumothorax
Arrows = atelectasis
Lung Pattern?
Pneumothorax
Arrows = atelectasis