What is a CT scan and how does it work?

A CT (Computed Tomography) scan is an advanced imaging technique that uses rotating x-rays and computer processing to create detailed cross-sectional images of the body. It works by having a narrow x-ray beam rotate around the patient while detectors collect data from multiple angles, which a computer then reconstructs into 2D slices or a 3D model.

How is CT different from a regular x-ray?

CT scanning provides cross-sectional images with much greater detail than plain x-rays. While both use x-ray principles, CT is safer and quicker, with lower radiation exposure due to shorter exposure time, and can detect subtle tissue density differences that x-rays cannot visualize.

What are the main advantages of CT scanning?

CT scanning produces detailed cross-sectional images of internal organs, is highly sensitive to tissue density differences, ideal for detecting deep-seated lesions, has lower radiation exposure compared to conventional x-rays, and provides faster imaging with each slice taking only seconds.

What is Spiral CT and how does it improve on traditional CT?

Spiral CT (SCT) enhances traditional CT by allowing the x-ray tube to rotate continuously while the patient moves through the scanner, creating a spiral beam path that captures continuous volumetric data. This results in faster image acquisition, higher resolution, better 3D reconstruction, and flexible viewing angles for detailed analysis.

Who invented CT scanning and when?

CT scanning was developed by Godfrey N. Hounsfield in 1970. The technique is also commonly referred to as CAT (Computerized Axial Tomography) scanning.

What types of medical conditions is CT scanning particularly good at detecting?

CT scanning is especially effective for detecting deep-seated lesions and visualizing internal organs in high detail. Its sensitivity to subtle differences in tissue density makes it ideal for identifying abnormalities that might not be visible on plain x-rays.

CT Scan (Computed Tomography) – Principles & Uses