Sir what is tomography?
Tomography
is a technique for displaying a representation of a cross section through a
human body or other solid object using X-rays, radio frequencies, gamma imaging
or ultrasound.
CT (COMPUTED
TOMOGRAPHIC) Scanners are used to create a 3D image of a solid object.
1. At first a series of 2D images of thin slices of object are taken.
2. Each ‘slice’ is then stored as a digital image in the computer
memory.
3. Then these 2D ‘slices’ are combined to form a 3D image of object.
Imagine a CT scan as if you were looking at one end of a loaf of bread
that has been cut into slices. By taking away each slice of bread, you can see
the entire internal section of the loaf from one end crust to the other. A
qualified professional will be able to look at each of these CT slices
individually or ‘add’ them together to view 3-D images of the organ or body
structure.
These cross-sectional images of the area being studied can then be examined
on a computer monitor, printed or transferred to a CD. These images allow a
qualified radiologist, a medical doctor who specializes in images of the body,
to help physicians diagnose and treat medical conditions and/or assist in
procedures by helping to accurately guide the placement of instruments or
treatments.
Sources:
Cambridge
IGCSE Computer Science
0 comments:
Post a Comment