Author Question: A PA chest projection obtained on expiration demonstrates 1. a narrower and longer heart shadow. ... (Read 16 times)

washai · **on:** Jul 17, 2018

A PA chest projection obtained on expiration demonstrates

1. a narrower and longer heart shadow.
2. an underexposed image if exposure is not increased when a manual technique is used.
3. a broader and shorter heart shadow.
4. fewer than 10 posterior ribs above the diaphragm.
a. 1 and 2 only
b. 1, 2, and 4 only
c. 3 and 4 only
d. 2, 3, and 4 only

Question 2

A PA chest projection with accurate positioning demonstrates

1. 10 or 11 posterior ribs above the diaphragm.
2. equal posterior rib length on both sides of the chest.
3. the manubrium superimposed by the fourth thoracic vertebra.
4. the scapulae outside the lung field.
a. 1, 2, and 4 only
b. 2 and 4 only
c. 1 and 3 only
d. 1, 2, 3, and 4