Search the Health Library
Get the facts on diseases, conditions, tests and procedures.
I Want To...
Find a Doctor
I Want To...
Find Research Faculty
Enter the last name, specialty or keyword for your search below.
Computed Tomography (CT)
The Computed Tomography (CT) Unit provides images of selected levels of the body in great detail. CT scanning is a non-invasive, painless medical test that helps physicians diagnose and treat medical conditions. The scans are produced by having the source of the x-ray beam encircle the patient. Sensors detect X-rays passing through the body. Information from these sensors are computer-processed and displayed as an image on a video screen. Slices as thin as 1 millimeter can be obtained, making high-resolution, 3D imaging not only possible, but remarkable. Scans of internal organs, bones, soft tissue and blood vessels provide greater clarity than conventional X-ray exams.
The CT unit also provides various services which include:
- Core biopsy and fine-needle aspiration
- Fluid and abcess drainage
- Nephrostomy tube placement
- Intraoperative assistance
- Cardiac coronary screening
- Brain perfusion and vessel mapping
- Low-dose chest screening
- Dynamic joint extremities
What Can I Expect?
Excellent patient care is our first priority when performing these state-of-the-art procedures. Many exams involve contrast, which allows imaging staff to more clearly see what's going on inside your body. You will either be asked to drink the contrast or it will be administered intravenously. Contrast is very safe and full explanation will be provided to you during your visit. Warm blankets are available for your comfort. Snacks and cold beverages are available after the scan is complete. Exam times can range from 20 to 45 minutes.
The CT scanner typically is a large machine with a hole in the center. You will lie on a table that slides in and out of the open hole. The X-ray tube and electronic X-ray detectors rotate around you. They are opposite each other in a right called a "gantry." The computer workstation that processes the imaging information is located in a separate room.
For more information or to schedule an appointment, please call 443-997-1811.
Computed Tomography (CT) Faculty & Staff
Director of CT, Johns Hopkins Bayview Medical Center
Patrick Tyler, RT(R)
Johns Hopkins Bayview Medical Center has been granted the American College of Radiology (ACR) gold seal. The ACR gold seal of accreditation represents the highest level of image quality and patient safety. It is awarded only to facilities meeting ACR Practice Guidelines and Technical Standards after a peer-review evaluation by board-certified physicians and medical physicists who are experts in the field. Image quality, personnel qualifications, adequacy of facility equipment, quality control procedures and quality assurance programs are assessed. The findings are reported to the ACR Committee on Accreditation, which subsequently provides the practice with a comprehensive report they can use for continuous practice improvement.
Request an Appointment
Already a Patient?
Traveling for Care?
Whether you're crossing the country or the globe, we make it easy to access world-class care at Johns Hopkins.