A Computerized Axial Tomography, also called CT Scan, CAT Scan or Spiral CT, uses advanced imaging technology and computer processing to obtain cross-section images of the internal structures, organs and bodily tissue. A CT scanner consists of a large, round imaging machine with an exam table that extends through the center of the imaging cylinder. The CT tube rotates around the exam table, capturing images of internal organs, blood vessels, muscles and the skeletal structure.
CT is a preferred diagnostic tool for studying the chest and abdomen due the clarity of its cross-sectional detail. CT imaging provides precise measurements, accurate locations, and diagnostic pathology of the lungs, bones, soft tissue, and blood vessels. CT is a preferred imaging modality for diagnosing and staging cancer (lung, liver and pancreatic), vascular disease, infectious disease, trauma and musculoskeletal disorders.
Preparation for a CT Scan varies based on which body part is being scanned. Specific guidance will be provided when the appointment is scheduled.
CT with contrast: Some CT Scans require contrast medium to view abnormalities with greater clarity. Liquid contrast is consumed approximately 90 minutes before the CT Scan. Sometimes an IV is required to administer an iodine-based contrast material to better define the blood vessels, kidneys, bladder and to enhance the difference between normal and abnormal tissues in organs like the liver and spleen. Prior to scheduling a CT Scan, please make sure the scheduler is made aware of any known allergies to contrast solutions or kidney problems.
Women should always inform the scheduler or technologist if there is any possibility that they are pregnant.
CT biopsy: Patients who are having a biopsy or a procedure under CT guidance need to arrange for someone to drive them home after the biopsy procedure. Patients should not consume food or beverages for 6 hours prior to a CT biopsy procedure.
Patients are asked to arrive 15 minutes prior to the scheduled CT imaging procedure to allow time to register and prepare for the scan. Patients will be asked to remove any clothing or accessories with metal that could potentially compromise image clarity. A gown or surgical scrubs may be offered. Before the procedure, the technologist will be available to answer any questions about what to expect during the CT Scan.
During the CT Scan procedure, patients lie on a narrow exam table that slides through the opening of the scanner. Depending on the body part that is being scanned, patients will lie on their back, side, or stomach for optimized imaging. The exam table can be raised or lowered to capture the sharpest possible image. Patients will lay still and may be asked to hold their breath for 5-10 seconds while the images are obtained. Reduced movement ensures image clarity and definition. Patients will hear a whirring sound as the x-ray tube rotates around the body to capture the images. Throughout the CT screening, patients can communicate at any time with the technologist via an intercom.
Depending on the type of CT Scan being performed, a CT procedure can last anywhere from 30 to 120 minutes.
A CT Scan involves exposure to radiation in the form of x-rays; however, the risks associated with a CT Scan are minimal. The lowest appropriate dose of radiation possible is used to provide an accurate diagnostic assessment. The benefits of a precise evaluation far outweigh the minimal exposure to radiation.
Patients who wear a continuous glucose monitor system such as Dexcom or FreeStyle Libre or an insulin pump will want to remove the device. The monitor's sensor can be damaged during a CT procedure, which could cause inaccurate readings. Please be sure the technologist is aware of these types of monitors prior to the scan.
Contrast is a non-ionic substance that makes abnormalities, blood vessels and tissues visible with greater clarity. Prior to scheduling a CT Scan, please make sure the scheduler is made aware of any known allergies to contrast solutions or kidney problems.
Depending on the type of CT exam, contrast will be consumed orally or through an IV line. If contrast is injected using an IV, patients may experience a brief warm sensation as the solution passes through the IV.
It is safe for a mother and her infant to continue breastfeeding after a CT Scan with contrast, but the decision to temporarily stop breastfeeding is ultimately left to the mother. If a mother is concerned about any potential ill effects to the infant, she may choose to abstain from breastfeeding from the time that the contrast solution was administered for a period of 12 to 24 hours. There is no need to stop breastfeeding beyond 24 hours.
CT Scans are administered by a board-certified technologist. The technologist does not provide the patients with any type of diagnostic assessment during the screening procedure, but they are trained to capture the best possible images from varying orientations for interpretation by a board-certified radiologist. A board-certified radiologist will read the images and provide a written diagnostic assessment of their findings for the referring physician within 24-48 hours of the CT Scan. A copy of the radiologist’s report will be made available to patients via the patient portal. The referring physician will review the results with the patient and will discuss the next steps for care.
Innovative Radiology is dedicated to furthering access to precise imaging and accurate diagnostic assessments to ensure that patients have a clear road map to optimally navigate their health journey.
Contact Us
Innovative Radiology has earned the gold seal of accreditation from the American College of Radiology® for achieving the highest standards of image quality and patient safety.