CT

whAt is a ct(COMPUTED TOMOGRAPHY) scan?

A computerized tomography (CT) scan combines a series of X-ray images taken from different angles around your body and uses computer processing to create cross-sectional images (slices) of the bones, blood vessels and soft tissues inside your body. CT scan images provide more-detailed information than plain X-rays do.

Why YOUR DOCTOR may RECOMmEND A CT scan?

Your doctor may recommend a CT scan to help:

  • Diagnose muscle and bone disorders, such as bone tumors and fractures

  • Pinpoint the location of a tumor, infection or blood clot

  • Guide procedures such as surgery, biopsy and radiation therapy

  • Detect and monitor diseases and conditions such as cancer, heart disease, lung nodules and liver masses


What Are the Risks Associated with a CT Scan?

There are very few risks associated with a CT scan. Though CT scans expose you to more radiation than typical X-rays, 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. The risk of cancer is increased in children receiving CT scans, especially to the chest and abdomen.

Some people have an allergic reaction to the contrast material. Most contrast material contains iodine, so if you’ve had an adverse reaction to iodine in the past, make sure to notify your doctor. Your doctor may give you allergy medication or steroids to counteract any potential side effects if you’re allergic to iodine but must be given contrast.

It’s also important to tell your doctor if you’re pregnant. Though the radiation from a CT scan is unlikely to harm your baby, your doctor may recommend another exam, such as an ultrasound or MRI scan, to minimize risk.


what to expect during and after the ct?

During the procedure

CT scanners are shaped like a large doughnut standing on its side. You lie on a narrow, motorized table that slides through the opening into a tunnel. Straps and pillows may be used to help you stay in position. During a head scan, the table may be fitted with a special cradle that holds your head still.


While the table moves you into the scanner, detectors and the X-ray tube rotate around you. Each rotation yields several images of thin slices of your body. You may hear buzzing and whirring noises.


A technologist in a separate room can see and hear you. You will be able to communicate with the technologist via intercom. The technologist may ask you to hold your breath at certain points to avoid blurring the images.



After the procedure

After the exam you can return to your normal routine. If you were given contrast material, you may receive special instructions. In some cases, you may be asked to wait for a short time before leaving to ensure that you feel well after the exam. After the scan, you'll likely be told to drink lots of fluids to help your kidneys remove the contrast material from your body.