L23- X-ray projection

Question 1

standard chest radiograph

Answer 1

patient standing up

X-ray beam passing throguh the patient from the posterior to the anterior (PA)

Question 2

Posterior-anterior view X-ray

Answer 2

beam passes through the patient from posterior to anterior

Question 3

when is anterior-posterior view X-ray used

Answer 3

Sometimes PA projection not possible. This is usually because the patient is too unwell to stand.

Question 4

Anterior- posterior view x-ray

Answer 4

Beam passes through the patient from posterior to anterior

Question 5

disadvanatge of AP view

Question 6

Lower quality than PA images

Image acquired by mobile x-ray unit in resuscitation room

• Scapulae are not retracted laterally and they remain projected over the each lung
• Heart size exaggerated

Question 7

in PA x-ray the scapulae

Answer 7

are retracted laterally with only a small portion projected over each lung

Question 8

if cardiothroacic ratio is abnormally check…

Answer 8

that the x-ray is not AP

Question 9

PA will show the cardiothroacic ratio

Answer 9

is clearly well within normal 50% (unless actual problem)

Question 10

which x-ray view is standard

Answer 10

posterior anterior (PA)

Question 11

why is heart magnified by AP projection

Answer 11

heart is an anterior structure within the chest

Magnification is exaggerated by the shorter distance between the X-ray source and the patient when acquiring AP image

Question 12

if x-ray is not labelled

Answer 12

assume PA

Question 13

lateral view x-ray

Answer 13

The lateral chest view may be performed as an adjunct to a frontal chest radiograph in cases where there is diagnostic uncertainty.

Question 14

The lateral chest view examines the

Answer 14

lungs, bony thoracic cavity, mediastinum, and great vessels.