principles

Question 1

the _____ separates the pleural cavities

Answer 1

mediastinum

Question 2

why is the upright chest x-ray preferred?

Answer 2

to demonstrate air-fluid level, allow the diaphragm to move to its lowest level, and show lungs at full capacity

Question 3

PA CHEST
SID:
IR:
CR:
RESPIRATION:

Answer 3

SID: 72”
IR: 14x17 LW top of IR is 1.5-2” above shoulders
CR: perp. entering MSP at T7
RESPIRATION: suspend at 2nd deep inspiration

Question 4

LATERAL CHEST
SID:
IR:
CR:
RESPIRATION:

Answer 4

SID: 72”
IR: 14x17 LW, top of IR is 1.5-2” above shoulders
CR: perp. entering MCP at T7
RESPIRATION: suspend at 2nd deep inspiration

Question 5

PA OBLIQUE CHEST
side best visualized?
degree of body obliquity?
SID:
IR: 
CR:
RESPIRATION:

Answer 5

the side farthest from the IR (PA away)
45 degrees LAO/RAO
SID: 72”
IR: 14x17 LW, top of IR 1.5-2” above shoulders
CR: perp. entering T7
RESPIRATION: suspend at 2nd deep inspiration

Question 6

AP OBLIQUE CHEST

which side is elongated?

Answer 6

side closest to IR is elongated

Question 7

LINDBLOM METHOD
SID:
IR:
CR:
RESPIRATION:
why is it done?

Answer 7

SID: 72”
IR: 14x17 LW, top is 1.5-2” above shoulders
CR: perp. to long axis of sternum, 15-20° caudal if AP or 10-15° cephalic if PA, entering T3
RESPIRATION: suspend at 2nd deep inspiration
done to see apices of lungs, pushes clavicles up

Question 8

why is the LEFT lateral decubitus done?

Answer 8

to make sure that air in the stomach (on the left side) is not mistaken for free air in the abdominal cavity