Anatomy - Imagining 08/11/17

Question 1

What does x-ray do?

Answer 1

Present tissues of varying density on x-ray film

Question 2

Body density is what on an x-ray?

Answer 2

Mass

Question 3

Image density is what on an x-ray?

Answer 3

Lightness or darkness on film

Question 4

Define radiopaque

Answer 4

Dense structure presented as WHITE

Question 5

Define radiolucent

Answer 5

Less dense structures presented as black

Question 6

How do you increase image clarity and decrease error in x-ray?

Answer 6

Position structure of interest closer to film

Question 7

Define PA

Answer 7

Posterioanterior. X-ray beams pass patient from posterior to anterior; vice versa with AP

Question 8

What is PA common with?

Answer 8

Chest x-ray (CXR)

Question 9

How is the body presented with CT?

Answer 9

Transverse sections

Question 10

What is CT?

Answer 10

Series of x-rays that the computer reconstructs slices as stackable slices of 3D body

Question 11

What is done in MRI?

Answer 11

Body is pulsed with radio waves in strong magnetic field with signals recorded

Question 12

How is MRI similar to CT?

Answer 12

Takes 2D slices and reconstructs to 3D

Question 13

How is tissue appearance modified?

Answer 13

Control of radiofrequency

Question 14

Can moving structures and flow be imaged in MRI?

Answer 14

Yes

Question 15

How are internal structures visible for US?

Answer 15

Ultrasonic waves

Question 16

Are movement and flow visible in US?

Answer 16

Yes

Question 17

Is US invasive or use radiation?

Answer 17

No

Question 18

What is something to use for imaging?

Answer 18

Look for asymmetry and use systematic way, structure by structure, to look at them.