How to Prepare for an X-Ray: A Complete Guide Before Your Exam

If your doctor has recommended an X-ray, you may be wondering how to prepare, whether you need to fast, what clothing you should wear, or if the exam is safe.

The good news is that most X-rays require little to no preparation. However, following a few simple recommendations can help ensure high-quality images and prevent the need to repeat the exam.

In this guide, our Radiology and Diagnostic Imaging specialists explain everything you need to know before your appointment, using evidence-based medical information and current radiology best practices.

An X-ray, also known as radiography, is one of the most commonly performed medical imaging exams. It uses a very small amount of ionizing radiation to create images of the inside of your body.

X-rays allow healthcare providers to visualize bones, joints, lungs, and other internal structures, helping diagnose injuries and a wide variety of medical conditions quickly and accurately.

Because the exam is fast, painless, and highly effective, it remains one of the first imaging tests physicians request.

Doctors use X-rays to diagnose or monitor many health conditions, including:

• Broken or fractured bones
• Joint dislocations
• Arthritis
• Bone infections
• Certain types of cancer
• Lung conditions, including pneumonia
• Digestive tract disorders
• Swallowed foreign objects
• Dental problems
• Spine abnormalities

Depending on your symptoms, your healthcare provider will determine which type of X-ray is most appropriate.

Preparation depends on the area of the body being examined. Most routine X-rays require minimal preparation, but following these recommendations can help your appointment go smoothly.

One of the most common questions patients ask is:

In most cases, the answer is no.

Routine X-rays, such as chest, arm, leg, hand, foot, or spine X-rays, usually do not require fasting.

However, if your exam involves the digestive system or requires a contrast agent, your physician may ask you to avoid food and drinks for 8 to 12 hours before the procedure.

Always follow the preparation instructions provided by your healthcare team.

Choose loose, comfortable clothing for your appointment.

Depending on the body part being examined, you may be asked to change into a medical gown.

You should also remove any metal objects, since they can interfere with image quality.

Remove items such as:

• Necklaces
• Earrings
• Watches
• Bracelets
• Glasses
• Body piercings
• Belts
• Clothing with metal zippers or buttons

Removing metal objects helps produce clearer diagnostic images.

If you are having an abdominal X-ray, your healthcare provider may recommend emptying your bladder before the procedure.

Once the examination begins, you may need to remain still for several minutes, so using the restroom beforehand can make the exam more comfortable.

Unless instructed otherwise, avoid drinking excessive amounts of water immediately before the exam.

Although X-rays use very low doses of radiation, it is essential to inform your healthcare provider if you:

• Are pregnant
• Think you may be pregnant
• Are trying to become pregnant

Depending on your situation, your physician may recommend postponing the exam or choosing another imaging test, such as ultrasound or MRI, when clinically appropriate.

Routine diagnostic X-rays do not affect breastfeeding.

If your exam requires contrast material, your physician or radiologist will explain whether any additional precautions are necessary.

Most X-ray examinations take between 5 and 15 minutes.

During the exam:

• A radiologic technologist will position the body part being examined.
• You may be asked to hold your breath for a few seconds.
• Remaining still is essential to prevent blurry images.

The procedure itself is painless.

Once completed, you can usually return to your normal daily activities immediately.

Some imaging studies require a contrast agent to improve visualization of certain organs or structures.

Depending on the examination, contrast may be administered by:

• Drinking a barium or iodine solution
• Taking a pill
• Receiving an intravenous injection

Before the exam, tell your healthcare provider if you have allergies to contrast agents or a history of kidney disease.

Your images are reviewed by a board-certified radiologist, a physician specially trained in interpreting medical imaging studies.

The radiologist prepares a detailed report that is sent to your referring physician, who will discuss the results with you and recommend any additional tests or treatment if needed.

Yes.

Modern X-ray equipment uses the lowest radiation dose necessary to obtain high-quality diagnostic images, following the internationally recognized ALARA (As Low As Reasonably Achievable) principle.

For most patients, the benefits of diagnosing disease or injury early greatly outweigh the minimal risks associated with medical imaging radiation.

Before your visit, remember to:

• Confirm whether fasting is required.
• Wear comfortable clothing.
• Remove all jewelry and metal accessories.
• Bring previous imaging studies if requested.
• Inform your healthcare provider if you are pregnant or breastfeeding.
• Arrive 15 to 20 minutes before your scheduled appointment.

These simple steps help ensure a smooth examination and accurate diagnostic results.

Most X-rays do not require fasting. However, digestive system examinations or studies involving contrast material may require fasting for 8 to 12 hours.

Yes, unless your physician gives you different preparation instructions.

Wear comfortable clothing and avoid jewelry or clothing containing metal.

Most X-ray exams take between 5 and 15 minutes.

No. X-rays are painless and non-invasive.

Yes. Modern imaging equipment uses very low radiation doses and follows strict international safety guidelines.

If you are pregnant or think you may be pregnant, tell your healthcare provider before the exam. Your physician will determine whether another imaging method is more appropriate.

Your X-ray is interpreted by a board-certified radiologist, who provides a diagnostic report to your referring physician.