A PET/CT scan is an imaging procedure that combines a PET scan and a CT scan. PET stands for “positron emission tomography” and CT stands for “computed tomography”.

During a PET scan, radioactive tracers are injected into the body. These tracers collect in areas of high cell activity, which allows doctors to see where there is cancer or other disease.

CT scans use X-rays to create detailed images of the inside of the body. By combining these two types of scans, doctors can get a more complete picture of the area in question.

PET/CT scans are often used to diagnose cancer, as well as to determine how far the cancer has spread and whether it has returned after treatment.

If you are scheduled for a PET/CT scan, there are a few things you should know in order to make the most of your appointment. First, it is important to arrive on time and to fast for at least six hours before the procedure. You will also need to avoid caffeine and other stimulants before the scan.

Once you arrive, you will be asked to remove all clothing and jewelry. You will then be given a gown to wear.

The technologist will help you onto the exam table and position you for the scan. Once you are in place, the table will slide into the CT scanner. The CT scanner is a large machine that looks like a donut.

You will need to hold very still during the CT portion of the exam, as even the slightest movement can blur the images. The CT scan takes about 10 minutes.

After the CT scan, you will be moved to the PET scanner. This machine looks similar to the CT scanner, but it has a large opening in the center. You will lie on your back on a sliding table that moves through this opening.

The technologist will position you so that your head is in the center of the machine. Once you are in place, the table will slide into the machine and the scan will begin.

During the PET scan, you may be asked to hold your breath for short periods of time. This helps to prevent motion artifacts in the images.

The PET scan takes about 30 minutes. Once it is finished, you will be able to get off the table and dress.

You will likely be able to go home after the exam, although you may need someone to drive you if you were given a sedative prior to the scan.

It usually takes 24-48 hours for the images from a PET/CT scan to be ready for interpretation by a radiologist. Your doctor will then review the images and discuss the findings with you.

PET/CT scans are an important tool in the diagnosis and treatment of cancer. If you are scheduled for this exam, be sure to follow all instructions from your doctor and technologist in order to ensure the best possible results.