Lecture 7: Imaging the thorax Flashcards
What is the hilar point?
V shaped points where the lower lobe pulmonary arteries cross the upper lobe pulmonary veins - should be symmetrical
What may be the cause of a raised hilum?
Upper lobe collapse
Fibrosis
What may be the cause of an obscured hilum?
Lymphadenopathy
Tumour
Mediastinal mass
What level is the aortic arch found?
T3/4
What is the definition of hyperexpansion?
If greater than 6 anterior ribs above the dome of the hemi-diaphragm
Normal in young
Asthma
COPD/emphysema
What is the name of the condition where there is air beneath the diaphragm?
Pneumoperitoneum
How can you determine whether a pneumothorax is tension or non-tension?
Tension - mediastinum/trachea shifted away from the midline
What may cause cardiomegaly?
Left ventricular heart failure
Pericardial effusion
Dilated cardiomyopathy
How can you tell if the tumour is in the upper lobe?
If it is just above the horizontal fissure
What is the relationship between different windows and varying greys?
Narrower windows will have more differences in grey for more similar objects
In wider windows different things will look more similar
Where does the inter ventricular septum receive most of its blood supply from?
Circumflex branch
What organs are involved in a red cell scan?
Heart, liver and kidneys
What organs are involved in a white cell scan?
Spleen, bone marrow (RE system)
What can be used for a red cell scan?
Tc99m
What can be used for a white cell scan?
Tc99m/In111
