Our veterinary diagnostic lab offers diagnostic imaging as a routine and emergency part of veterinary care. But what are the differences between CT scans and X-ray imaging tools? Learn what to expect when bringing your cat or dog in for these imaging procedures from our Snellville vets.
CT Scans vs. X-Rays
Diagnostic imaging is a vital part of veterinary care. It provides information about the internal functions to make diagnosis and treatment quicker and easier. So, what should you know about X-rays vs. CT scans?
X-rays are one of the most useful and widely used tools in veterinary medicine. X-rays can give your veterinarian an image of your pet's bones, tissues, and internal organs. X-rays are non-invasive, painless, and safe for dogs and cats. X-rays, especially digital X-rays, use extremely low doses of radiation.
Also known as a CT or CAT scan, computed tomographic imaging uses radiation (X-rays) and a computer to capture multiple individual images or 'slices' throughout a region of interest in the body.
A CT scanner's image can be compared to one slice of bread that's part of an entire loaf. The CT machine produces two-dimensional slices of a section of your pet's anatomy and then reconfigures them to a complete image that a vet can see.
These slices can also create three-dimensional reconstructions that can help plan surgeries. Once the images are produced, your veterinarian can review and interpret them.
While we aren't discussing them today, you may have heard the term PET scan. A PET scan is slightly different from a CT scan as it shows doctors how the body's tissues work on a cellular level. This is done by injecting a material known as radiotracers, which glow on the images.
When are X-rays and CT scans needed?
Veterinary diagnostics are used to diagnose different conditions or illnesses depending on an animal's needs.
X-Rays
X-rays for dogs are an extremely useful diagnostic tool. A wealth of information can be obtained. Your vet may recommend an X-ray based on potential underlying health issues in your dog, including:
- Trauma
- Tumors / Cancer
- Foreign objects, including GI obstruction
- Fractured bones
- Heart disease
- Pneumonia, bronchitis, asthma
- Fluid within the abdomen or chest
- Bladder stones
- Organ enlargement
- Muscle, joint, or ligament tears; arthritis; hip dysplasia
- Pregnancy
- Dental diseases
- Determining if surgery is necessary
CT Scans
A CT machine produces high-resolution images, which allows for a detailed evaluation of your pet's anatomy that would not be possible with standard X-rays.
CT scanners provide a clear view of your pet's soft and bony structures, including the spine, nasal cavity, musculoskeletal system, thorax, and extra-thoracic structures. They can be used to evaluate:
- Nasal disease
- Lung cancer
- The extent of canine and feline cancers
- Ear disease
- Pulmonary pathology
- Vascular abnormalities
- Musculoskeletal and bone disorders, such as fractures or bone tumors
CT scans can be used to help plan and facilitate surgery and minimize surgery time, which is important for pulmonary and liver tumors.
How can I prepare for my dog or cat's CT Scan or X-ray appointment?
CT scans or X-rays are often performed when a cat or dog is brought into our veterinary laboratory for an appointment. No preparation is required for these.
Your vet will examine your pet and explain the CT scan or X-ray procedure if one is required. They'll also discuss what they will be looking for.
If your dog or cat has a diagnostic test scheduled at our pet laboratory in Snellville, your vet will give you any necessary instructions on the day of the procedure.
Will my dog or cat be sedated when they have their diagnostic imaging test?
If your dog or cat is calm, not in too much pain, and can lie comfortably while the CT scan or X-ray is taken, sedation will not be necessary.
On the other hand, sedation will be recommended if your dog or cat is squirmy, edgy, or in pain. Sedation may also be used during your pet's scan in certain cases, as they must be relaxed to get a clear image.
If biopsies are needed, your pet will require a short-acting anesthetic or heavy sedative to help them relax during the procedure and prevent potential complications. Your veterinarian will let you know if this is necessary.
Are CT scans & X-rays safe for dogs & cats?
CT scans are very safe procedures. Like an X-ray, CT scans use ionizing radiation, but at doses that are not harmful to pets.
X-rays and CTs are typically used only occasionally and generally as diagnostic tools. In some circumstances, vets use X-ray technology to glean information about a dog's pregnancy. However, other forms of imaging, such as ultrasound, could be used in that case.
If you're concerned about using X-ray or CT scanner technology and your dog's or cat's health, speak to your vet. Your veterinarian will be able to explain the risks versus the benefits in your dog's or cat's particular case so that you can decide whether to have an X-ray or CT scan.
Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.