CT scans

Question 1

CT

Answer 1

Computer tomography, a combination of various radiography at different angles to eliminate a superposition of anatomical structures and display 3D slices

Question 2

Normal back projection

Answer 2

A bad approach to CT
Produces a blurry radiography

Question 3

Why is the image so blurry from normal back projection?

Answer 3

There is a superposition of low frequency signals around the object

Question 4

Radon transform and sinogram

Answer 4

The entrance signal is modified to account for the superposition of the lower frequencies surrounding the object.

Question 5

How is resolution measured?

Answer 5

Line pair per mm

Question 6

Fourth generation of R&D

Answer 6

Detectors arranged in a fixed outer ring
The only source is rotating
It take a few seconds

Question 7

Uses of CT scans

Answer 7

Diagnose tumors
Investigate internal bleeding and other internal injuries or damage
Prepared for surgery
Plan radiotherapy treatments
Follow up on cancer progression