What is computed tomography and how does it work?

CT scans are diagnostic imaging tests that produce detailed images of interior organs, bones, soft tissue, and blood arteries. CT scan cross-sectional scans can be reformatted in several planes, and three-dimensional images can be viewed on a computer monitor, reproduced on film, or transferred to electronic devices. Because the images allow your doctor to confirm the presence of a tumour and estimate its size and location, CT scanning is frequently the best tool for detecting many different malignancies. CT scans are quick, painless, noninvasive, and precise. It can disclose internal injuries and bleeding soon enough to save lives in emergency situations.

According to the "Coherent Market Insights" Global Industry Insights, Trends, Outlook, and Opportunity Analysis of Computed Tomography Market.

 

Computed Tomography Market
Computed Tomography Market

How a Computed Tomography ​system works?

The patient is moved through a circular hole in the CT imaging system by a motorised table.

A source of x-rays circulates around the inside of the circular hole as the patient travels through the CT imaging equipment. It takes around a second to complete a single rotation. A narrow, fan-shaped beam of x rays is produced by the x-ray source, which is utilised to irradiate a segment of the patient's body. The fan beam can be as thin as 1 millimetre or as thick as 10 millimetres in thickness. There are multiple phases in a normal examination, each consisting of 10 to 50 spins of the x-ray tube around the patient while the table moves through the circular opening.

A "contrast substance" may be injected into the patient to help visualise the vascular anatomy.

The x rays exiting the section of the patient's body being irradiated are recorded as an x-ray "snapshot" at one point of the source of x rays by detectors on the exit side of the patient. During one entire revolution, many separate "snapshots" are collected.

For each complete rotation of the x-ray source, the data is transferred to a computer, which reconstructs all of the individual "snapshots" into a cross-sectional image of the inside organs and tissues. 

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