CT Scan

Fast, Accurate Imaging That Supports Your Care

CT Scan

A computed tomography, commonly known as a CT scan, is a fast, painless imaging test that helps your health care team see detailed pictures of the inside of your body, such as bones, organs, and blood vessels. Your scan will be done by a specially trained technologist using advanced CT scan equipment that captures clear, cross-sectional images. These images help your doctor make informed decisions about your care.

CT scans are often used to:

  • Check for injuries after trauma or an accident
  • Find the cause of symptoms like pain or swelling in muscle or around bones
  • Help diagnose conditions such as cancer, heart disease, or infections
  • Guide treatments like surgery or cancer treatment

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What to Expect During Your CT Scan

If you've been scheduled for a CT scan, where's what you can expect:

Before Your CT Scan

  • A CT technologist will explain the process and answer any questions.
  • You’ll be asked about your medical history and any medications you’re taking.
  • Depending on what part of your body is being scanned, you'll likely be asked to change into a gown and remove jewelry or anything metal.

During the CT Scan

  • You’ll lie on a table that slides into the CT machine (it looks like a large ring).
  • The technologist will help position you and may use straps or cushions to help you stay still. Staying still is important. It helps get clear, accurate images.
  • Depending on what you are getting scanned, you might be given a contrast agent (either by drinking a solution, or by IV) to help highlight certain areas. Most people feel fine, but let the technologist know if you feel itchy or short of breath. This could be a sign of an allergic reaction.
  • The scan itself is quick. You’ll hear a soft whirring sound as the machine takes images.
  • You may be asked to hold your breath for a few seconds during certain parts.
  • Most CT scans take 10-30 minutes, including prep time. The timing varies, so talk to your care team to better understand the timing.

After the Scan

  • A doctor who specializes in reading medical images, a radiologist, will review your scans.
  • Your results for a routine scan will likely be available within 24 to 48 hours. Outpatient scans may take up to a week.
  • Your care team will follow up with your results and talk through next steps.

Types of CT Scans

These are the most common types of CT scans:

Standard CT Scan

  • Provides detailed images of bones, organs, and soft tissues
  • Used to diagnose injuries, infections, tumors, and more
  • May require a contrast dye to be ingested or given through an IV to highlight specific areas

Low-Dose CT or LDCT

  • Uses less radiation than the standard CT scan
  • Often used for lung cancer screening
  • Usually takes less than a minute
  • Helps detect lung nodules and other changes early, when treatment is most effective

CT Angiography

  • Focuses on blood vessels to check for blockages, aneurysms, or clots in the heart or other areas
  • Often used to evaluate heart health or stroke risk 

 

FAQ about CT scans

What can a CT scan detect? 
CT scans help doctors see inside your body with detailed images of bones, organs, blood vessels, and soft tissues. They’re used to detect injuries, infections, tumors, blood clots, and other conditions. CT scans can also help guide treatments like surgery or radiation.
What's the difference between a CT scan and MRI? 

CT scans use X-ray technology to create images, while MRIs use magnetic fields and radio waves. CT scans are faster and better for seeing bones and detecting bleeding or trauma. MRIs are often used for soft tissue details, like the brain, muscles, and joints.

What should I avoid before a CT scan? 
Talk to your health care team about how you should prepare for your CT scan. If your scan will involve contrast dye, you may be asked not to eat or drink for a few hours beforehand. Avoid wearing jewelry or clothing with metal, as this will interfere with the imaging. Let your care team now if you may be pregnant, or if you have allergies.
How long does a CT scan take? 
Most CT scans take between 10 and 30 minutes, including prep time. The actual scan is usually just a few minutes
How do I prepare for a CT scan? 
Talk to your care team to see what you need to prepare. Bring a list of your medications, wear comfortable clothes, and be ready to remove metal items. If contrast dye is needed, you may receive it as a drink or through an IV.
What are the benefits of a CT scan? 
CT scans are quick, noninvasive, and provide detailed images that help doctors diagnose and treat conditions accurately. They’re especially useful in emergencies and for planning surgeries or other treatments.
Is the radiation from a CT scan dangerous? 
CT scans do use radiation, but the amount is carefully controlled. At CHRISTUS, we use advanced technology to keep doses as low as possible while still getting clear images. For most people, the benefits of getting the scan done outweigh the risks.
Does a CT scan hurt? 
No. CT scans are painless. You’ll lie still on a table while the machine takes images. If contrast dye is used, you might feel warm or flushed briefly.
Can I get a CT scan while pregnant? 
If you’re pregnant or think you could be, let your care team know before undergoing a CT scan. They are generally avoided during pregnancy unless absolutely necessary. Your doctor will help decide the safest option for you and your baby.

CT Scanning Technology at CHRISTUS

SOMATOM Definition Flash 
  • Scans quickly and with lower radiation exposure, thanks to its Flash Spiral and Dual Source technology.
  • Ideal for children, cardiac imaging, and patients who need faster exams.
  • Produces sharp images with minimal motion blur, even in challenging cases.
Symbia Truepoint SPECT CT 
  • Combines CT with molecular imaging to show how organs and tissues are functioning.
  • Useful for early detection and staging of cancer and heart disease.
  • Designed for comfort, with an open layout and thin table to accommodate patients of all sizes.
Somatom Sensation 64 Slice CT 
  • Captures detailed images in a single breath hold, reducing motion artifacts and radiation exposure.
  • Excellent for cardiac scans and high-resolution views of bones and vessels.
  • Allows extended coverage of anatomical areas with superior image quality.
GE Lightspeed 16CT Scanner 
  • Produces fast, thin-slice images with sub-millimeter resolution.
  • Great for visualizing small blood vessels, fine bone structures, and coronary arteries.
  • Designed to deliver high-quality images with responsible dose management.
Vitrea 3D Imaging Workstation 
  • Converts CT and MRI data into 2D, 3D, and even 4D images.
  • Helps your care team explore anatomy from multiple angles for better diagnosis and treatment planning.