Patterns of Lung Disease

Question 1

what measurements are used to guide CT scans

Answer 1

(godfrey) hounsfield units

nobel prize in stockholm in 1979

air = (-1000) 
bone = 1000

Question 2

two substances of the same density that come into contact that cannot be differentiated from each other on an xray is called what

Answer 2

silhouette sign

term coined by ben felson MD