A computerized axial tomography scan, more commonly called CAT or CT scan, uses x-rays and computers to make detailed painless images. A very thin beam of x-rays pass through your body from each of 360 degrees to make the data that is collected and assembled by computer into thin cross sectional images of the interior structures. The cross sectional images, or "slices", are similar to the slices in a loaf of bread, except the CT slices are much thinner, sometimes numbering in the hundreds for a single exam. If needed, the computer can assemble three dimensional models by "stacking" the slices together. Depending on the body part that is being examined, contrast media, commonly called "dye" may be given. Different contrast media are used for different purposes, but all serve to highlight a particular type of structure, setting it apart from surrounding structures of a similar density.
CT exams at Genesis are performed by registered Radiologic Technologists who are encouraged to successfully complete CT registry.
What to Expect
CT exams are performed on a machine with a large hole in it. You will lie on a table that moves into the "donut hole". The x-ray tube and sensor across from it are inside the machine and move around the hole. Depending on which body part is being examined, the exam will take between 5 and 15 minutes. Please wear comfortable loose fitting clothes. Metal objects will affect the image, so if you have metal on your clothing you may be asked to change into a gown. For best results, lie as still as possible while the exam takes place. You may be asked to hold your breath for short periods. Although you will be alone in the scan room, your technologist will be monitoring you from the adjoining control room.
The CT technologist will take a series of images appropriate to the body part being examined. The images will be sent to and stored on PACS. A Radiologist will interpret the images and dictate a report that with be typed and sent to the doctor that ordered the exam for you.