Computed Tomography

Question 1

What is tomography

Answer 1

the use of xrays to create a sharp image of any selected plane within the patient

Question 2

what is conventional radiography

Answer 2

In an image of all superimposed layer of objects in the beam path, which can cause confusing or distracting shadows

Question 3

what is film tomography

Answer 3

• to get an image in one plane only, the image of the tissue above and below the selected plane are blurred

Question 4

what is film tomography useful for?

Answer 4

Complex structures such as spines, abdomen, thorax and joints

Question 5

what does c.t stand for?

Answer 5

Computerised tomography

Question 6

how do CT images work?

Answer 6

An xray beam is passed through a thin cross-section of the body while the xray tube rotates around the patient during the xray exposure

Question 7

advantages of CT scans

Answer 7

Improved radiographic contrast resolution
cross sectional anatomical presentation
more accurate than conventional xrays

Question 8

Disadvantages of CT scans

Answer 8

High cost
GA required
Weight limitation
Size limit on the enclosure