What is City Scan? And what are the disadvantages of City Scan? Let's know

What is a CT scan?

A computed tomography (CT or CAT) scan allows doctors to see inside your body. It uses a combination of X-rays and a computer to make pictures of your organs, bones, and other tissues. It shows more detail than a regular X-ray. You can get a CT scan of any part of your body. The procedure does not take much time, and it is painless.

They use a narrow X-ray beam that travels around a part of your body. It provides a series of images from many different angles. A computer uses this information to create a cross-sectional picture. Like a slice of bread, this two-dimensional (2D) scan shows a "slice" inside your body.

This process is repeated to make several slices. The computer stacks the scans in a

A radiology technologist will perform the CT scan. During the examination, you will lie on a table inside a large, doughnut-shaped CT machine. As the table moves slowly past the scanner, the X-rays move around your body. It is normal to hear a whistling or humming noise. Movement can blur the image, so you will be asked to stay very still. You may need to hold your breath from time to time.

How long the scan takes will depend on which parts of your body are being scanned. It may take a few minutes to half an hour. In most cases, you will go home the same day.
How is it used?

A long list of reasons why doctors order a CT scan includes:
A CT scan can detect bone and joint problems, such as complex fractures and tumors.

If you have a condition such as cancer, heart disease, emphysema, or a liver mass, a CT scan can detect it and help doctors see any changes.

They show internal injuries and bleeding, such as those caused by a car accident.
They can help detect tumors, blood clots, extra fluid, and infections.

Doctors use them to guide treatment plans and procedures, such as biopsies, surgery, and radiation therapy.

Doctors can compare CT scans to find out if specific treatments are working. For example, scans of a tumor over time can show whether it is responding to chemotherapy or radiation.

What is a CT scan with contrast?

Dense materials such as bones can be easily seen in a CT scan. But the soft tissue is also not visible. They may appear faint in the image. To help them show up clearly, you may need a special dye called a contrast material. They block X-rays and appear white on scans, exposing blood vessels, organs, and other structures.

Contrast material is usually made of iodine or barium sulfate. You can get these drugs in one of three ways:

Injection:- Medicines are injected directly into the vein. This is done to help your blood vessels, urinary tract, liver, or gallbladder stand out in the image.

Orally: Drinking a liquid with contrast material can scan your digestive tract, increasing the passage of food through your body.

Enema: If your bowels are being scanned, a contrast material may be inserted into your rectum.

After a CT scan, you will need to drink plenty of fluids to help your kidneys remove the contrast material from your body.

Are there any disadvantages?

CT scans use X-rays, which produce ionizing radiation. Research shows that this type of radiation can damage your DNA and cause cancer. But the risk is still very low – the chance of a fatal cancer being caused by a CT scan is 1 in 2,000.

But the effects of radiation add up over your lifetime. So your risk increases with each CT scan. Talk with your doctor about the possible risks and benefits of the procedure, and ask why the CT scan is necessary. Ionizing radiation can be more harmful in children.

This is because they are still growing. They also have more years to cover for exposure to radiation. Before the procedure, you may want to ask the doctor or technician whether the CT machine's settings have been adjusted for a child.

Tell your doctor if you are pregnant. If you need imaging for your abdominal area, your doctor may recommend a test that doesn't use radiation, such as an ultrasound.

What are its side effects?

Some people are allergic to contrast material. Most of the time, the reaction is mild. This may cause itching or a rash. In very rare cases, the dye can trigger a life-threatening reaction. For this reason, your healthcare provider may monitor you for a short time after your CT scan. Tell your doctor about any allergies you have two medicines, seafood, or iodine.

Your doctor should also know if you have diabetes and are taking the drug motorman. They will tell you whether you should stop taking your medicine before or after your procedure.