CT uses X-rays and a computer to create images of the body in "slices". The exam can be done with or without contrast, according to your doctor’s order. Contrast is a substance given into a vein (or, in some cases, taken by mouth) that highlights vessels and organs and helps tell what is normal from what needs attention.
Why are urea and creatinine requested?
CT contrast leaves the body through the kidneys. Urea and creatinine are simple blood tests that show how the kidneys are working. At Vita Imagem, patients aged 70 or older who will receive contrast must bring the results of these tests on the day of the CT scan.
If you have kidney disease, diabetes or take medication regularly, let us know when booking: the team will assess your case.
Allergies or asthma? Tell us beforehand
Anyone with a history of allergies (to medicines, to contrast or others) or asthma should tell us when booking. This way, the nursing team will contact you before the exam to explain the preparation.
What about fasting?
Fasting and the other instructions vary according to the type of CT scan and are given when you book. Always follow the instructions you received for your exam.
Checklist for the day
- Arrive 60 minutes before your appointment.
- Bring the medical order (authorized, if through a health plan), photo ID and CPF.
- Bring previous exams of the same area, if they were not done at Vita Imagem.
- If you are 70 or older and will receive contrast, bring your urea and creatinine results.
- Patients under 18 must be with their legal guardian.
After the exam, follow the team’s instructions.
Informational content. It does not replace your doctor’s advice.
