Fluoroscopy is a medical imaging modality that is similar to regular X-rays because it uses radiation to acquire images. However, it has a unique advantage: instead of a single snapshot (still-image), it creates real-time images—like a video—of your body’s insides. It may help to think of plain X-rays like photographs and fluoroscopy like a movie of your internal organs.
Fluoroscopy is used for two main purposes: it can help diagnose what’s happening inside the body, and it can guide doctors during certain treatments or surgeries.
How does Fluoroscopy work?
Fluoroscopy uses X-rays that pass through your body and are displayed on a special screen. This creates short, dynamic video clips called cine loops, which are displayed on a monitor so doctors can watch the movement inside your body.
Why is Fluoroscopy required?
Fluoroscopy is often needed when your doctor wants to see how things are working inside without invasive surgery. Some common uses include:
- Barium Studies: Used to assess your digestive tract (like the esophagus, stomach, and intestines).
- Hysterosalpingography: Examines the uterus and fallopian tubes.
- Intravenous Urography: Looks at the kidneys, ureters, and bladder.
- Retrograde and Micturating Cystourethrography (RUCG/MCUG): Examines the bladder and urethra.
Some of these tests may require a special dye called contrast to make things easier to see.
Fluoroscopy is also useful for guiding procedures, such as:
- Biopsies: Helps doctors guide a needle into the body to collect tissue samples.
- Stent Placements: Which involves placing small devices to open up narrowed or blocked blood vessels.
- Catheter Insertions: Guides catheter placement in blood vessels or other areas.
- Arthrography: Used to examine joints in the body.
- Surgical Guidance: Helps guide surgeons during complex operations.
How much radiation is used?
The amount of radiation used varies depending on the type of fluoroscopy procedure. Some procedures require very low radiation (this is largely a function of the length of procedure), while others, especially lengthy interventional ones, may use more.
Since radiation is used, should I be worried?
There’s no need to worry. Think of it like flying on a plane—there’s a small risk, but when all safety measures are in place, you’re protected. Fluoroscopy machines are set to safe levels, and trained professionals manage the procedure to avoid unnecessary exposure.
Can a pregnant individual have fluoroscopy?
Pregnancy Precaution
Fluoroscopy is generally avoided during pregnancy due to potential risks to a developing baby. If you might be pregnant, let your doctor know so they can decide the best approach.
For a specific procedure, like Hysterosalpingography (HSG), your doctor might ask you to abstain from sex for a short period and do a blood pregnancy test before scheduling, to be certain.
Who performs the test?
Fluoroscopy can be done by different trained professionals depending on where you are and the standards of practice locally. This might include radiologists, radiographers, cardiologists, or orthopedic surgeons or a team consisting of one or more of these professionals.
Is the test painful?
The fluoroscopy itself doesn’t hurt, as X-rays don’t cause physical discomfort. However, some specific procedures might involve minor pain or discomfort based on the type of exam. Your doctor will usually explain what to expect beforehand.
Can I eat or drink before my test?
This depends on the type of procedure. Some fluoroscopy tests require you to fast or avoid certain foods while some typically do not. Check with your doctor about any specific instructions.
Should I stop my medication?
Medicine instructions depend on the procedure, kidney function, contrast route, and sedation plan. Metformin is not automatically stopped for every contrast examination. Do not change diabetes treatment or another medicine unless the clinical team gives you a specific plan.
What should I wear on my scheduled day?
Wear comfortable, loose-fitting clothes that are easy to remove since you might need to change into a hospital gown.
Can I use the restroom while waiting for my test?
This is a very common question, and the answer is, generally speaking, yes. However, for some types of exams, you may be instructed otherwise. Communication is again very important. Be sure to ask your healthcare team if you’re unsure.
Is fluoroscopy safe?
Yes, it’s generally safe when used appropriately. The team handling the procedure are trained to takes steps to minimize your exposure, this involves using the lowest dose possible and protective equipment as applicable.
What should I expect during a fluoroscopy procedure?
You may be asked to change into a hospital gown and remove any jewelry or metal objects. Depending on the exam, you might lie on a table or stand, and a contrast dye could be administered to help highlight areas of interest.
How long does a fluoroscopy procedure take?
The length varies by procedure. Some take just a few minutes, while others can take an hour or longer if they’re more complex or involve multiple steps.
What are the alternatives to fluoroscopy?
Alternatives to fluoroscopy may include ultrasound, MRI, or CT scans, depending on what your doctor needs to see. Should you have any reservations about getting a fluoroscopy, be sure to discuss your options with your physician so they can help you choose the best alternative for your situation.
Can I resume normal activities after the procedure?
Most people can go back to their usual activities right after the procedure. However, if sedation was used or the procedure was more involved, you might need some rest and possibly a ride home.
Is there any special care required after the procedure?
Aftercare depends on whether contrast was swallowed, injected into a vein or body cavity, or administered through a catheter, and whether sedation was used. Follow the center's instructions; extra fluid may be inappropriate for people with heart or kidney fluid restrictions.
Who interprets the fluoroscopy images?
A radiologist, who specializes in imaging, reviews the fluoroscopy images and sends a report to your doctor.
Will I receive the results immediately?
Your doctor typically discusses the results with you soon after, as the radiologist sends a report once they’ve reviewed the images.
What are the important limitations and safety checks?
Fluoroscopy shows movement or anatomy during a specific examination, but it does not guarantee a diagnosis or exclude every abnormality. Image quality and interpretation can be limited by positioning, movement, body size, retained contrast, overlying structures, incomplete filling, or the patient's ability to complete the study. Further endoscopy, ultrasound, CT, MRI, laboratory testing, or tissue sampling may still be needed.
Fluoroscopy uses ionising radiation. Dose varies with the body area, examination complexity, equipment, patient size, and imaging time; the team should use the lowest exposure that still answers the clinical question. Tell the team before the examination if you are or may be pregnant. Pregnancy does not create a universal ban: the referrer and imaging team should decide whether to defer, modify, or proceed when the expected benefit outweighs the risk.
Contrast and preparation are procedure-specific. Barium, water-soluble iodinated contrast, intravenous contrast, and contrast placed into a joint, bladder, uterus, duct, or fistula have different risks. Tell the team about prior reactions, swallowing or aspiration problems, suspected perforation, kidney or thyroid disease, diabetes, medicines, and recent contrast studies. Do not fast, stop medicines, interrupt breastfeeding, or take bowel preparation or antibiotics based only on a general webpage; follow the center's written instructions.
Sources and further reading
- RadiologyInfo.org: Fluoroscopy
- American College of Radiology: Manual on Contrast Media
- RadiologyInfo.org: Radiation safety for children
Conclusion
Fluoroscopy is a valuable imaging tool, allowing doctors to see inside the body in real-time. This is extremely helpful for both diagnosing and guiding treatments. While it uses radiation, the procedure is managed by trained professionals who keep exposure at safe levels. If you have any concerns, don’t hesitate to ask your care provider—they’re there to ensure your experience is safe and comfortable.