How is a computed tomography performed?
During the test, you'll lie on a table inside a large, doughnut-shaped CT machine.
As the table slowly moves through the scanner, the X-rays rotate around your body.
It's normal to hear a whirring or buzzing noise.
Movement can blur the image, so you'll be asked to stay very still..
How is a CT image formed?
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.
The number of X-rays that pass through the object is inversely proportional to the density of the object..
How is a CT image generated?
The term “computed tomography,” or CT, refers to a computerized x-ray imaging procedure in which a narrow beam of x-rays is aimed at a patient and quickly rotated around the body, producing signals that are processed by the machine's computer to generate cross-sectional images, or “slices.”.
What is the basic working principle of CT scan?
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.
The x-ray source produces a narrow, fan-shaped beam of x rays used to irradiate a section of the patient's body (Figure 4).Sep 28, 2020.
What is the purpose of the CT imaging system?
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..
- 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.
