Computed tomography (CT) scans allow medical professionals to view internal structures; they show these structures with high levels of detail. These diagnostic tools help identify issues like internal injuries, tumors, or bone fractures that might not be visible on a standard X-ray. While your provider may recommend a DEXA scan to specifically measure bone density, a CT scan provides a more comprehensive 3D view of your organs and tissues. Here is more information about CT scans and what goes on at an appointment:
Defining Diagnostic Scans
A CT scan uses a rotating X-ray beam to create cross-sectional images of the body. Technicians use the scanner to combine multiple X-ray measurements into a single detailed image. While a DEXA scan primarily focuses on measuring bone mineral density, a CT scan allows for the evaluation of soft tissues and blood vessels. Providers order these tests to detect cancer, and they also use them to monitor the progress of heart disease.
Because both tests utilize ionizing radiation, they share some technological similarities despite their different goals. A DEXA scan employs two low-dose beams to evaluate fracture risks, but the CT machine captures thousands of data points to build a complete anatomical map. Radiologists rely on the high-resolution output of a CT to identify acute trauma in medical emergency situations. Your physician chooses the appropriate imaging modality based on whether they need to see bone strength or internal organ health.
Preparing for Imaging
Wear loose and comfortable clothing to your imaging appointment. Metal objects like jewelry or zippers can interfere with the image quality, so you may need to change into a hospital gown. If your scan requires contrast dye, your provider will likely ask you to fast for several hours beforehand. Inform the technologist about any allergies or medications before the procedure begins.
Here are the steps of the CT scan procedure:
- The technologist positions you on a motorized table that slides into the donut-shaped scanner.
- The X-ray tube rotates around your body while the table moves slowly through the machine.
- You may be asked to hold your breath for short periods to prevent blurring of the images.
You can receive contrast material through an IV or by drinking a special liquid. Although the scanner makes clicking and whirring sounds, the process is painless for the patient. The actual scan typically takes only five minutes to complete.
Reviewing Scan Results
After the test, a radiologist examines the captured images to look for abnormalities or signs of disease. They write a formal report based on their findings, and they send this information directly to your referring physician. You can typically discuss the results with your doctor within a few days of the appointment.
Schedule CT or DEXA Scan
Professional imaging services provide the detailed information necessary for accurate medical diagnoses. If you are scheduling an appointment for a CT scan, your provider may schedule you for a DEXA scan as well. A radiologist reads the results of a CT scan, and your provider will help you understand the results. For more information about CT scans, consult your healthcare provider today.
