CT With Contrast: What to Expect Before Your Scan
If your provider ordered a CT scan with contrast, it is normal to have questions. The words “with contrast” can sound more intense than the actual experience for most patients. This guide explains what contrast is, why it may be used, what it can feel like, and what you should tell our team before your appointment.
What is contrast in a CT scan
Contrast is a liquid that helps certain organs and blood vessels show up more clearly on a CT scan. By improving visibility, contrast can help your care team get more detailed information from your images.
Depending on the exam your provider ordered, contrast may be given:
- Through an IV in your arm
- By mouth for certain exams
- Less commonly by another method based on the study
Your ordering provider chooses the type of contrast and the timing based on the question they are trying to answer.
Why your provider might order a CT with contrast
A CT scan without contrast can still be very useful for many concerns. Contrast may be added when more detail is needed. Common reasons include:
- Evaluating abdominal pain when inflammation or infection is a concern
- Looking more closely at organs such as the liver, pancreas, kidneys, or bowel
- Assessing blood vessels
- Taking a closer look at a finding from a prior exam
Your exam is tailored to your medical history and the symptoms your provider is investigating.
What IV contrast typically feels like
Most patients do very well with IV contrast. If you receive IV contrast, you may notice:
- A brief warm sensation
- A metallic taste
- A short feeling like you need to urinate
These sensations are common and usually pass quickly, often in under a minute. If anything feels uncomfortable or unexpected at any point, tell your technologist right away.
What to tell us before your CT scan
Before your appointment, please let our team know if any of the following apply to you:
- A prior reaction to contrast
- Kidney disease or reduced kidney function
- Asthma or a history of severe allergies
- Diabetes, especially if you take medications such as metformin
- Pregnancy, or any chance you could be pregnant
Even if you are unsure whether something matters, tell us anyway. Our team will guide you on the next steps based on your exam.
Simple tips for the day of your scan
A few small things can make scan day smoother:
- Arrive a little early for check in and screening questions
- Wear comfortable clothing and avoid metal when possible
- Follow any fasting instructions you were given for your specific exam
- Drink water unless you were told not to
If your provider gave you specific prep instructions, those should always take priority.
How long does a CT scan take
The imaging portion of most CT exams is quick. Your total visit time can vary depending on the type of exam, whether contrast is needed, and check in steps. Our team will walk you through what to expect when you arrive.
Questions about your appointment
If you have questions about your scheduled CT scan, call us and we will help you.
Bluegrass Regional Imaging
(859) 276 2157
1401 Harrodsburg Road, Suite C-25, Lexington, KY
Frequently asked questions
Is contrast always required for a CT scan
No. Some CT exams are performed without contrast, and others are performed with contrast depending on what your provider needs to evaluate.
What if I have had a reaction to contrast before
Please tell us ahead of time. Your provider and our team can help determine the safest approach for your exam.
What if I am nervous about the scan
That is more common than you think. Let our staff know when you arrive. We will explain each step and help you feel comfortable throughout the process.
Disclaimer: This content is for informational purposes only, advising readers to contact their healthcare provider if they need assistance, and mentioning that all things mentioned in the posts may or may not be performed at Bluegrass Regional Imaging (BRI).
