Quality

Question 1

What is the quality of a medical image determined by?

Answer 1

1. Imaging method
2. The characteristics of the equipment
3. Imaging variables selected by the operator

Question 2

What are the 5 factors of Image quality?

Answer 2

1. Contrast
2. Blur
3. Noise
4. Artifacts
5. Distortion

Question 3

What is the task of every imaging system?

Answer 3

Translate a specific tissue characteristic into image shades of gray or colour

Question 4

What happens when the contrast is adequate?

Answer 4

The object will be visible

Question 5

What does the degree of contrast in the image depend on?

Answer 5

Characteristic of both the object and imaging system

Question 6

What are the different form of contrast in an image?

Answer 6

Different shades of;

1. Gray
2. Light intensities
3. Colors

Question 7

What is the most fundamental characteristic of an image?

Answer 7

Contrast

Question 8

When is an object within the body visible in an image?

Answer 8

Sufficient physical contrast relative to surrounding tissue

Question 9

What must the physical contrast of an object represent?

Answer 9

Difference in one or more tissue characteristics

Question 10

In radiography what can objects be imaged relative to?

Answer 10

1. Surrounding tissue
2. If there is adequate difference in either density or atomic number
3. Object is sufficiently thick