CT SCAN

Subject : Science & tech

Context : CT scan is like 5-10 x-rays, not 300-400: Docs’ body refutes Guleria’s ‘unscientific’ comments

Concept :

CT scan

It is also known as computed tomography scan.
It is a medical imaging technique used in radiology to get detailed images of the body noninvasively for diagnostic purposes.
CT scanners use a rotating x-ray tube and a row of detectors placed in the gantry to measure X-ray attenuations by different tissues inside the body.
The multiple X-ray measurements taken from different angles are then processed on a computer using reconstruction algorithms to produce tomographic (cross-sectional) images (virtual “slices”) of a body.
The use of ionizing radiations sometimes restricts its use owing to its adverse effects.