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The CT scanner is typically a large, donut-shaped machine with a short tunnel in the center. This procedure may use other equipment, including an intravenous line (IV), ultrasound machine and devices that monitor your heart beat and blood pressure. The x-ray machine and a detector suspended over the exam table produce the video. Doctors use it to watch and guide procedures. Fluoroscopy converts x-rays into video images. This exam typically uses a radiographic table, one or two x-ray tubes, and a video monitor. If you have not already provided your radiologist with prior relevant imaging exams (e.g., MRI of lumbar spine), bring them with you on the day of your procedure. See the Safety in X-ray, Interventional Radiology and Nuclear Medicine Procedures page for more information about pregnancy and x-rays. If an x-ray is necessary, the doctor will take precautions to minimize radiation exposure to the baby. Doctors will not perform many tests during pregnancy to avoid exposing the fetus to radiation. Women should always tell their doctor and technologist The nurse will give you a gown to wear during the procedure. Plan to have someone drive you home after your procedure. Your doctor will tell you which medications you may take in the morning.
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Your doctor will likely tell you not to eat or drink anything after midnight before your procedure. Tell your doctor about recent illnesses or other medical conditions. Your doctor may tell you to stop taking aspirin, nonsteroidal anti-inflammatory drugs ( NSAIDs) or blood thinners before your procedure. List any allergies, especially to local anesthetic, Tell your doctor about all the medications you take, including herbal supplements. Prior to your procedure, your doctor may test your blood to check your kidney function and to determine if your blood clots normally.