How are CT images formed?
CT images are two-dimensional pictures that represent three-dimensional physical objects.
The images are made by converting electrical energy (moving electrons) into X-ray photons, passing the photons through an object, and then converting the measured photons back into electrons..
What is computed tomography what are its functions?
Computed tomography is commonly referred to as a CT scan.
A CT scan is a diagnostic imaging procedure that uses a combination of X-rays and computer technology to produce images of the inside of the body.
It shows detailed images of any part of the body, including the bones, muscles, fat, organs and blood vessels..
What is CT scan and block diagram?
The CT (computed tomography) scanner is a medical imaging technique that uses X-rays and computers to generate cross-sectional images (or "slices") of the internal structures of the body.
It was invented in the 1970s by Godfrey Hounsfield and Allan Cormack, who shared the 1979 Nobel Prize in Medicine for their work..
What is the structure of computed tomography?
Unlike a conventional x-ray—which uses a fixed x-ray tube—a CT scanner uses a motorized x-ray source that rotates around the circular opening of a donut-shaped structure called a gantry..
Why are CT images helpful?
CT scans can be used to identify disease or injury within various regions of the body.
For example, CT has become a useful screening tool for detecting possible tumors or lesions within the abdomen.
A CT scan of the heart may be ordered when various types of heart disease or abnormalities are suspected..
- A CT scan can be used to visualize nearly all parts of the body and is used to diagnose disease or injury as well as to plan medical, surgical or radiation treatment.
- Aim: The CT scout view (topogram) is a 2-dimensional X-ray image acquired using a CT scanner.
The topogram is routinely used in clinical CT scanning only to define the scan range of the subsequent CT scan. - How a CT system works.
A motorized table moves the patient (Figure 3) through a circular opening in the CT imaging system.
As the patient passes through the CT imaging system, a source of x rays rotates around the inside of the circular opening.
A single rotation takes about 1 second.
