Overview
A CT or CAT scan is a diagnostic imaging procedure that uses a combination of x-rays and computer technology to produce cross-sectional images (often called slices) of the body. A CT scan shows detailed images of any part of the body, including the bones, muscles, fat, organs, and blood vessels. CT scans are more detailed than standard x-rays.
In standard x-rays, an invisible beam of energy is aimed directly at the body part being studied. A plate behind the body part captures the variations of the energy beam after it passes through skin, bone, muscle, and other tissue. While much information can be obtained from a regular x-ray, a lot of detail about internal organs and other structures is not available.
During CT scans, the x-ray beam moves in a circle around the body as oppose to a straight line during a general x-ray. This allows many different views of the same organ or structure, and provides much greater detail. The x-ray information is sent to a computer that interprets the x-ray data and displays it in 2-dimensional form on a monitor. Additional advanced technology and computer software makes three-dimensional (3-D) images possible.
CT scans may be done with or without contrast. "Contrast" refers to a substance taken by mouth or injected into an intravenous (IV) line that causes the particular organ or tissue under study to be seen more clearly. Contrast examinations may require you to fast for a certain period of time before the procedure. Your physician will notify you of this prior to the procedure.
You will need to let your physician know if you have ever had a reaction to any contrast dye or if you are allergic to iodine. If you have any medical conditions or recent illnesses, inform your physician. If you are pregnant or think you may be pregnant, you should notify your physician and not proceed with the CT scan unless absolutely necessary.
Before Your Appointment
Scheduling Your Exam
Our Patient Access Coordinators are available to assist with scheduling your appointment from Monday through Friday 8AM to 7PM ET and Saturday and Sunday 9AM to 5PM ET. (212) 746-6000
If you have seen a Weill Cornell Medicine doctor and have been referred for an imaging exam, you may receive a notification in Connect or an email from us prompting you to schedule your appointment online.
If your provider is not affiliated with Weill Cornell Medicine but you would like to online schedule, please use this "Request an Appointment" link. As long as you have a copy of your prescription, you will be able to online schedule your appointment with us.
Whether you are using the computer or our Connect app on your smartphone, we are sure you will find we have made it easy for you!
Exam Forms
By logging in to Weill Cornell Connect, eCheck-In makes it easy to save time and complete all safety forms required for your upcoming appointment.
Exam Preparation
Please notify our staff when scheduling and checking in for your appointment if any of the following apply to you:
- If there is any possibility that you are pregnant.
- If you are allergic to contrast.
- If you have a history of kidney disease, especially if you are on dialysis.
- If you are diabetic.
- If you need an interpreter to assist you with your native language.
If you are having a Cardiac CTA (Computed Tomography Angiography of your heart), review the exam preparations by following the link below.
FAQ
During Your Appointment
CT Scan Procedure
- You will lie on a scan table that slides into a large, circular opening of the scanning machine.
- The CT staff will be an adjacent room where the scanner controls are located. However, you will be in constant sight of the staff through a window. Speakers inside the scanner will enable the staff to hear and communicate with you. You will have a call bell so that you can let the staff know if you have any problems during the procedure.
- As the scan begins, you may hear humming sounds during the procedure as the x-ray tube and detectors rotate and begin to collect information.
- It is very important that you remain very still during the procedure. You may be asked to hold your breath at various times during the procedure. If you have breathing issues which prevent breath-holds, please let us know prior to the exam.
- Upon completion, the technologist will escort you outside of the scanning room where you will retrieve your personal belongings and proceed to check-out.
After Your Visit
Imaging Review
Once the technologist has taken your images, one of our sub-specialty radiologists will review them and write your report.
Receiving Your Results
Your report will be available to you and your referring provider within 24-48 hours. Our radiologists will automatically provide prompt results of your imaging examination to your referring physician.
You may also follow the guide above to view your images, reports or share results through Connect.
If you are looking to view your images, follow this guide.
Understanding Your Results
Please contact your referring provider directly for your results and to discuss your report. They can provide interpretation and address any questions you may have.
If you or your physician have further questions, our Reading Room Coordinators (RRC) ensure all communication requests to and from radiologists are relayed and connected appropriately.
To get in contact with our RRC’s or for more information, please contact:
- Phone: 646-962-5999
- Email: wc-rrc@med.cornell.edu
- Hours: Monday through Friday 8AM-12AM & Saturday through Sunday 8AM-5PM
Billing and Insurance
We are committed to providing you with accurate and detailed information about your charges and payment options. For any questions, please contact our Insurance & Pre-Authorization Department at (212) 746-6000, option 2.
For further information or to ask a question about a bill you have received, please contact:
- Weill Cornell Imaging at NewYork-Presbyterian Billing Office
Phone: (646) 962-3300