Waiting rooms aren’t exactly known for excitement. So when someone says, “You’ll be in and out in no time,” it’s fair to wonder what that really means—especially if you’re scheduled for a CT scan. If you’re curious about how long a CT scan takes, the answer might surprise you: it’s often quicker than grabbing a coffee.
What Happens During a CT Scan?
Let’s walk through the process so you know what to expect.
A CT scan (short for computed tomography) uses X-rays and computer processing to create detailed images of your body. It’s a powerful diagnostic tool that helps doctors spot everything from broken bones to internal bleeding and tumors.
Here’s a typical timeline:
Check-In and Prep (5–15 minutes) You’ll fill out forms, answer a few health questions, and possibly change into a gown. If your scan requires contrast dye, you might get an IV or drink a special liquid.
Positioning and Instructions (5 minutes) A technologist helps you lie on the scanning table and explains what’s about to happen. You’ll be asked to stay still and may need to hold your breath briefly.
The Actual Scan (2–5 minutes) The table slides into the CT machine, which looks like a giant donut. The machine rotates around you, capturing images. It’s fast, painless, and usually done in under five minutes.
Post-Scan Wrap-Up (5–10 minutes) If you had contrast dye, you might be monitored briefly. Otherwise, you’re free to go. Results are typically sent to your doctor within a few days.
Did You Know?
The first CT scan was performed in 1971 in London. It revolutionized medical imaging and earned its inventors a Nobel Prize.
CT scans are faster than MRIs, which can take 30–60 minutes.
Some modern CT machines can scan your entire body in under 30 seconds.
How Long Does a CT Scan Take? It Depends
Several factors can affect the total time:
Body Part Being Scanned: A head scan is quicker than a full-body scan.
Use of Contrast Dye: Adds prep and monitoring time.
Facility Workflow: Busy hospitals may have longer wait times.
Patient Needs: Children or those with mobility issues may need extra time.
Mini Q&A
Q: Is the scan noisy?
A: Not really. Unlike MRIs, CT scans are relatively quiet.
Q: Will I feel anything?
A: The scan itself is painless. If contrast dye is used, you might feel a warm sensation.
Q: Can I drive afterward?
A: Yes, unless you’ve had a sedative or feel unwell.
A Quick Story
I remember getting a CT scan after a minor bike accident. I was nervous—it sounded high-tech and intimidating. But the whole thing took less time than my usual grocery run. The staff explained everything clearly, and I was back home before lunch. It made me appreciate how far medical tech has come.
So, How Long Does a CT Scan Take?
Most CT scans take between 10 and 30 minutes, including prep and wrap-up. The scan itself? Often just a few minutes. If you’re heading in for one, rest easy—it’s probably quicker than you think.
Got questions or stories about your own CT scan experience? Drop them in the comments or share this post with someone who’s curious!