CT Scan
CT scans use X-rays from multiple angles as the patient moves through the machine. An X-ray tube and digital detector rotate rapidly inside the machine to capture detailed images of bones, soft tissue, organs, and blood vessels. This internal rotation is not felt by the patient. CT scans provide more detailed images than traditional X-rays and are crucial for diagnosing conditions like acute brain trauma and kidney stones.
The CT scanner takes many thin two-dimensional pictures, which a computer assembles into three-dimensional images. This allows doctors to examine the scanned area layer by layer, aiding in diagnosis.
Many CT scans require a contrast dye, given either as a drink before the scan or through an IV during the scan. The contrast enhances image clarity by highlighting specific body parts.
Before the procedure
Remove all metal
This includes things like hearing aids, jeans with metal zippers, body piercings, and removable dental work. Wearing a sweatsuit without any metal can save you from having to change into a gown.
For CT of the Abdomen / Pelvis
Do not eat anything 8 hour prior to your exam time. You may drink clear liquids (example: water, ginger ale, apple juice). Keep hydrated before and after your exam.
For oral contrast
Avoid taking if you are allergic to iodine.
Start drinking the oral prep one hour and 40 minutes before your exam, aiming to finish 20 to 30 minutes before the scheduled appointment.
What to expect during the procedure
Initially, the technologist checks for any metal on your body and discusses your medical history. Then, you're instructed to lie on the scanning table, which is centered within the machine, and to remain as motionless as possible for optimal image clarity. Typically brief, most exams take only a few minutes, varying according to the body part being examined.
The procedure is non-invasive, with the machine never making physical contact with your body. Throughout the exam, the technologist remains accessible via intercom should any concerns arise.