Child Pelvis X-Ray: Uses, Preparation & What to Expect

A pelvis X-ray is a common imaging test that helps doctors see the bones around a child’s hips and lower spine. It is quick, painless, and uses a very small dose of radiation to create detailed pictures that can guide diagnosis and treatment.

Understanding the Pelvis and What an X-Ray Shows

The pelvis is the ring of bones that connects the spine to the legs. In children, parts of these bones are still growing and have not yet fully fused, so the X-ray image looks different from that of an adult.

A pelvis X-ray can show:

• Hip joints (where the thigh bones meet the pelvis)
• Pelvic ring bones, including the hip bones, sacrum, and tailbone
• Areas where bones are still growing, called growth plates
• Changes in bone shape, alignment, or density

Because X-rays show bones very clearly, this test is especially useful when doctors are worried about fractures, abnormal hip development, or other bone conditions.

Why a Doctor Might Order a Pelvis X-Ray for a Child

Pelvis X-rays help answer specific questions about pain, injury, or abnormal findings on a physical exam. Common reasons include:

• Injury or trauma to the hip or pelvis after a fall, sports accident, or car crash
• Persistent pain in the hip, groin, or upper leg that does not improve
• Difficulty walking, limping, or refusing to bear weight on a leg
• Visible deformity or abnormal leg or hip position
• Suspected bone disease, such as infection, tumor, or bone thinning
• Screening or follow-up for known conditions that affect the hips or pelvis
• Pre- and post-surgical imaging to plan surgery or check healing after an operation

In emergencies, pelvis X-rays are often used as a first-line test to quickly look for fractures or major structural problems.

Preparing Your Child for a Pelvis X-Ray

Most children do not need special preparation. Still, a few steps can make the experience smoother and reduce anxiety.

Before You Arrive

• Explain in simple terms that an X-ray is like “taking a picture of your bones,” and it does not hurt.
• Let your child know they will need to lie very still for a few seconds while the picture is taken.
• Bring a comfort item, such as a favorite toy or blanket, if allowed by the facility.
• If your child is anxious, plan to arrive early so they have time to get used to the environment.

Clothing and Personal Items

• Your child may be asked to change into a hospital gown so that clothing snaps, zippers, or buttons do not block the image.
• Remove jewelry, belts, and anything metal around the abdomen and hips.
• Diapers or thick clothing may be removed or adjusted to avoid covering the area being imaged.

Important Safety Information to Share

• Pregnancy: Always tell the technologist if your child is or could be pregnant. X-rays involve ionizing radiation, which is of particular concern for developing fetuses.
• Medical devices: Inform staff about any implanted devices, such as rods, pins, or braces, which may appear on the image.
• Recent imaging: Let the care team know if your child has had multiple X-rays or CT scans recently to help them track total exposure.

Step-by-Step: What Happens During the Exam

A pelvis X-ray is usually done in a radiology department, imaging center, or sometimes a doctor’s office. The entire visit is typically short, often around 10–15 minutes.

1. Check-In and Greeting

• You and your child are brought into the X-ray room, where you may see a table and a camera-like machine.
• A radiologic technologist (imaging specialist) explains what will happen and answers questions.

2. Positioning on the Table

• Your child will usually lie on their back on the X-ray table.
• A digital recording plate or detector is placed under or behind the pelvis to capture the image.
• The technologist may gently move your child’s legs or hips so the bones can be viewed from the best angle.

3. Protecting the Rest of the Body

• To limit radiation to areas not being imaged, the technologist may cover parts of your child’s body with a lead shield when appropriate.
• If you stay in the room, you will usually wear a lead apron and stand in a designated safe area.

4. Taking the X-Ray Images

• The technologist moves behind a glass window or protective wall to activate the X-ray machine.
• Your child will be asked to stay very still and may be told to briefly hold their breath while the picture is taken.
• The actual exposure time is less than a second, but the positioning and instructions can take a few minutes.
• Several views are usually taken; for example, with the legs straight and with the hips slightly rotated.

5. After the Pictures Are Taken

• The technologist checks the images to be sure they are clear and show all of the needed areas.
• If an image is blurry because of movement, a repeat picture may be taken while you are still in the room.
• Your child can then get dressed and go home or return to their hospital room.

What Doctors Look For on a Pelvis X-Ray

Once the exam is done, a radiologist (a doctor specially trained to read imaging tests) studies the pictures and prepares a report for your child’s healthcare provider.

Depending on the reason for the exam, they may look for:

• Fractures or breaks in the pelvic bones, hip bones, or upper femurs
• Dislocation or misalignment of the hip joint or pelvis
• Bone tumors or cysts, or signs suggesting bone infection (osteomyelitis)
• Developmental differences, such as abnormal shape of the hip socket or pelvis
• Degenerative changes or unusual wearing of joints (less common but possible in some chronic conditions)
• Foreign objects or surgical hardware, such as plates or screws

Typical Timeline for Results

Radiation Exposure: How Risk Is Kept Low

All X-rays use ionizing radiation, which in high doses can increase the risk of cancer. Pelvis X-rays involve a low dose, and for children, imaging facilities follow strict safety standards to keep exposure as low as reasonably achievable (ALARA).

Safety Measures in Pediatric X-Ray

• Child-sized settings: X-ray machines use lower exposure settings that account for a child’s smaller body.
• Limited imaging area: Only the area of interest is included in the image to avoid unnecessary exposure.
• Protective shielding: When appropriate, lead aprons or shields cover nearby body parts.
• Alternative tests: When possible, providers may choose ultrasound or MRI, which do not use ionizing radiation, especially in pregnancy or when multiple follow-up studies are expected.

Special Considerations for Pregnancy

Because the developing fetus is more sensitive to radiation, guidelines recommend that X-rays involving the abdomen or pelvis in females of reproductive age are done only when medically necessary.

• If your child is or could be pregnant, tell the doctor and technologist before the exam.
• The care team may choose a different imaging method, such as ultrasound, if it can safely answer the same question.
• If the pelvis X-ray is urgent and cannot be postponed, additional shielding and dose-minimizing strategies are used.

Benefits vs. Risks of a Pelvis X-Ray

For most children, the potential benefits of a pelvis X-ray clearly outweigh the small risks.

Caring for Your Child After the Exam

There are generally no side effects from the X-ray itself. Your child can return to regular activities unless the doctor gives other instructions related to the underlying condition.

After the exam, you can:

• Offer reassurance if your child was nervous or upset.
• Follow any activity restrictions suggested by the doctor if a fracture or significant injury is suspected.
• Write down any questions about treatment so you can discuss them when you receive the results.

Frequently Asked Questions (FAQs)