Imaging and Anatomical Positioning

Question 1

What colour do air, fat, soft tissues, bones and metal appear on X-rays?

Answer 1

Air = black
Fat = fairly black
Soft tissues = grey
Bones = white
Metal = very white

Question 2

What can CT scans differentiate which X-rays can’t.

Answer 2

CT scans can differentiate between soft tissues and water.

Question 3

In terms of the colour of different substances, what is the difference between an MRI T1 and MRI T2?

Answer 3

In T1, fluid appears black. In T2, fluid appears white.

Question 4

In terms of the colour of different substances, what are the differences between CT scans and MRI scans?

Answer 4

Bone is white in CT scans: black in MRI.
Marrow is grey in CT: white in MRI
Fat is fairly black in CT: white in MRI

Question 5

Air is black in which type of scan?

Answer 5

Both CT and MRI

Question 6

Soft tissues are grey in which type of scan?

Answer 6

Both CT and MRI.

Question 7

In the feet, what is the base and top of the foot called?

Answer 7

Plantar surface and dorsal surface respectively.

Question 8

What is the palmar surface of the hand also referred to as?

Answer 8

Volar

Question 9

What is a protraction and a retraction?

Answer 9

Protraction: anterior movement
Retraction: posterior movement.

Question 10

What is a flexion and what is an extension?

Answer 10

Flexion: contraction
Extension: relaxation

Question 11

What does pronation describe?

Answer 11

Palmar surface points inferiorly. (Opposite to supination).