Part 10

Question 1

What is the value assigned to an object to quantify the extent to which it attenuates x-ray?

Answer 1

Linear Attenuation Coefficient (u with a line coming down the left side of the u)

Question 2

What does (u with a line coming down the left side of the u) stand for?

Answer 2

Linear Attenuation Coefficient (u with a line coming down the left side of the u)

Question 3

What is the relative accuracy between calculated CT numbers and their respective linear attenuation coefficients?

Answer 3

Linearity

Question 4

What is the reversible process whereby the CT image is digitally compressed in size without loss of data and is identical to the original?

Answer 4

Lossless Compression

Question 5

What is the irreversible process whereby data are lost during the compression process and the CT image does not exactly match the original?

Answer 5

Lossy Compression