CT stands for Computed Tomography. It is 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.” CT machines have been called one of the most important advances in radiology since the X-ray. The introduction of CT scanners has helped cut down the need for invasive procedures, allowing detailed glimpses into the body without having to touch a scalpel.
How does CT scan work?
During a CT scan, the patient lies on a bed that slowly moves through the gantry while the x-ray tube rotates around the patient, shooting narrow beams of x-rays through the body. Instead of film, CT scanners use special digital x-ray detectors, which are located directly opposite the x-ray source. The detectors measure the amount of radiation that passes through different areas of the body and sends this information to a computer. The computer then processes this information to create cross-sectional images (slices) of the bones, blood vessels and soft tissues inside your body.
What is the difference between CT scan and MRI?
CT scans and MRI scans are two methods of imaging internal body parts. They have similar uses but produce pictures in different ways. CT scans use X-rays while MRI scans use strong magnets and radio waves. A CT scan is generally good for larger areas, while an MRI scan produces a better overall image of the tissue under examination.
Types of CT scans?
There are different types of CT scans depending on the organs that are to be studied. Here are some of the most common types of CT scans:
CT Scan Brain: The brain along with all its parts is studied in great detail in this procedure.
CT angiography: A doctor might order a CT angiography, or angiogram, if they want to assess a person’s risk of heart disease or stroke.
CT abdomen scan: During an abdominal CT scan, a technologist will capture images of the organs of the digestive tract.
CT bone scan: This type of scan is used to detect bone diseases and injuries.
Virtual colonoscopy
CT lung cancer screening
Single photon-emission computed tomography (SPECT).
What are the risks of having a CT scan?
There are very few risks associated with a CT scan. These include exposure to radiation, allergic reactions to contrast dyes, and increased cancer risk with multiple scans. However, the risk of cancer caused by radiation is very small if you only have one scan. Your risk for cancer may increase over time if you have multiple X-rays or CT scans.
To write a content on this is not easy because there will be a lot of information. So tried to inform a Non-tech person in a very superficial way. Thank you.
Mr. Shivu Y S
Biomedical Engineer
Manasvi Healthtech
Mysore, KA - 570009