If you’ve recently received a referral for a CT Scan or an X ray, you might have a few questions. Is one of them, what is the difference between a CT scan and an X ray?
An X ray is a fast, low dose image best suited to bones, while a CT scan builds detailed cross sectional images of soft tissue and organs. If you’re wondering why you were referred one over the other, we can help explain why.
Both use X-ray technology, which is where the confusion usually starts. An X-Ray takes one image in a matter of seconds, using a small dose of radiation to capture dense structures like bone clearly. A CT scan works differently. It takes a series of images from multiple angles around the body, then combines them into thin cross sectional slices. That extra step is what allows a CT scan to reveal organs, blood vessels, and subtle abnormalities that simply don’t show up on an X-Ray. More detail generally means a slightly higher radiation dose and a longer appointment, though modern CT scanners have brought both down significantly over the years.
X rays remain the first choice for straightforward issues. Suspected fractures, chest infections, joint pain, and dental checks are all commonly investigated with an X ray because it’s quick, widely available, and gives a clear enough picture without needing anything more involved. Most X ray appointments, including setup and positioning, are done within 10 to 15 minutes.
CT scans come into play when a doctor needs to look beneath the surface. A CT scan of the abdomen, for example, can help identify the cause of ongoing abdominal pain, internal bleeding, kidney stones, or other issues that wouldn’t be visible on a standard X ray. CT scans are also widely used for head injuries, chest complaints, and cancer screening, giving doctors the detailed information needed to make an accurate diagnosis quickly.
This is one of the most common questions patients ask before their appointment. The scan itself, including a CT scan abdomen, generally takes between 5 and 20 minutes. Once you factor in check in, positioning, and contrast dye if your doctor has requested it, the full appointment usually runs closer to 30 to 45 minutes. It’s a short procedure overall, and understanding this timeframe is often the part of the difference between a CT scan and an X ray that surprises people most, since many expect it to take much longer.
This isn’t a decision to make on your own, and you don’t need to. Your GP or specialist chooses the right scan based on your symptoms and history, and a good imaging provider will always follow that referral. As a general guide, X rays usually suffice for suspected fractures and chest infections, while CT scans are used for ongoing abdominal pain (where a CT scan abdomen gives a much clearer picture), unexplained internal symptoms, or complex injuries an X ray can’t fully explain. Understanding the difference between a CT scan and an X ray won’t change your doctor’s decision, but it does help you feel more prepared and less anxious about what’s ahead.
Whichever scan your referral is for, where you go to get it done is entirely your choice. Gippsland Lakes Medical Imaging (GLMI) offers both X ray and CT, alongside ultrasound, bone densitometry, and dental imaging, across three convenient Gippsland locations in Bairnsdale, Lakes Entrance, and Sale. All CT scans at GLMI are bulk billed, and pensioners and healthcare card holders receive bulk billing on most other procedures too, so cost shouldn’t stand between you and the answers your doctor needs.
If your referral is addressed to another provider, that’s completely fine. GLMI accepts all valid referrals regardless of who they’re made out to, so you’re never locked into a particular clinic. Our experienced, local radiographers use modern equipment to keep your scan accurate and as comfortable as possible, and results are processed quickly so your doctor isn’t left waiting.
If you’re still unsure whether your situation calls for a CT scan or an X ray, or you simply want to know more about how long a CT scan takes before you commit to booking, our friendly team at GLMI is happy to talk you through it. Our booking system is simple, finding the right answers starts with the right scan, done locally, by people who know Gippsland.
