Radio Flashcards
Silhouette sign
LOWER lobe affectation
(when the cardiac border is obliterated with the opacity on the lung)
loss of normal borders between thoracic structures. It is usually caused by an intrathoracic radiopaque mass that touches the border of the heart or aorta.
What finding in a scout film of the abdomen is indicative of strangulation obstruction?
A. Coffee bean sign
B. Changing position of the fluid-filled bowel loop
C. Jejunal caliber of 20 mm
D. Valvulae conniventes are distinct
A. Coffee bean sign
A density in the right middle cerebral artery territory in non-contrast CT scan suggests the occurrence of this within 24 hours:
A. Infarction
B. Intraparenchymal hemorrhage
C. Subarachnoid hemorrhage
D. Encephalomalacia
A. Infarction - The diagnosis of ischemic cerebral infarction by CT usually is not possible for 12-24 hr after the event. A sign that allows earlier diagnosis is increased density of a cerebral vessel secondary to a thrombus or embolus
.
B. Intraparenchymal hemorrhage
C. Subarachnoid hemorrhage - hyperattenuating material is seen filling the subarachnoid space
D. Encephalomalacia
