Lecture 1: Introduction to Radiology

Question 1

What are the 3 types of interactions that can occur in patient when taking an image

Answer 1

1. No interaction
2. Absorbed
3. Scattered (noise)

Question 2

Describe how the %x-ray absorbed changes with a film alone vs with intensifying screens

Answer 2

Film alone only 3% X-ray absorbed, but with screens up to 30% absorbed

Question 3

Order the level of opacity from most opaque to least opaque: air, bone, metal, fat, water (soft tissue and fluid)

Answer 3

1. Metal
2. Bone
3. Water (fluid and soft tissue)
4. Fat
5. Air

Question 4

2D representation of a 3D object results in ___

Answer 4

Superimposition

Question 5

What is more radiolucent: air or metal

Answer 5

Air

Question 6

What 4 things make a quality radiographic study

Answer 6

1. Good positioning
2. Appropriate technique
3. Appropriate labeling
4. At least two views

Question 7

What could result from overexposure

Answer 7

Lose important information, may lose some structures altogether

Question 8

What could result from underexposure

Answer 8

Can create artifactual lesions, lose detail

Question 9

Identify directions 1-11

Answer 9

1. Rostral
2. Caudal
3. Dorsal
4. Cranial
5. Caudal
6. Cranial
7. Caudal
8. Dorsal
9. Palmar
10. Dorsal
11. Plantar

Question 10

Cranial or rostral is always on what side

Answer 10

Left

Question 11

Caudal is always on what side

Answer 11

Right

Question 12

For ventrodorsal or dorsoventral images left to the __, right to the __

Answer 12

Right, left

Question 13

Name this radiographic view

Answer 13

Ventrodorsal abdomen

Question 14

Name this radiographic view

Answer 14

right lateral thorax