Ct Scan

Question 1

Rotate/ translate, pencil beam

Answer 1

First generation

Parallel ray geometry

Only Two xray detectors were used

Question 2

Rotate tanslate, narrow beam

Answer 2

Second generation

30 array of detectors

Question 3

Rotate/rotate, wide fan beam

Answer 3

Third generation

800 detectors

Shorter than 5 secs

Question 4

Rotate/ stationary

Answer 4

Fourth generation

4800 detectors

Question 5

Was designed to overcome the problem of ring artifact

Answer 5

Fourth generation ct scan

Question 6

Stationary/staitionary

Answer 6

Fifth generation

Cine ct

Question 7

Electron beam scanners

Answer 7

Cine ct scanner

Fifth gen

Question 8

Helical aka spiral

Answer 8

Sixth gen

Question 9

Multiple detector array

Answer 9

Seventh gen

Question 10

Artifacts in ct because rays from some projection angles are hardened to a differing extent than rays from other angles

Answer 10

Beam hardening

Question 11

Blurring and larger physical displacements produce double images or image ghosting

Answer 11

Motion artifacts