About bone scans
A bone scan is a non-invasive imaging technique that uses a radioactive substance to visualize the bones. It is different from an x-ray or CT scan in that it shows cell activity in the bones.
How Boston Children's Hospital approaches bone scans
The Nuclear Medicine and Molecular Imaging Program at Boston Children's is committed to providing a safe, comfortable, and child-friendly atmosphere with:
- specialized nuclear medicine physicians with expertise in interpreting bone scans in children of all ages
- certified nuclear medicine technologists with years of experience imaging children and teens
- Child Life specialists to help families prior to and during exams
- equipment adapted for pediatric use, which means age-appropriate care for children
- protocols that keep radiation exposure as low as reasonably achievable while assuring high image quality
Frequently asked questions
A bone scan is a non-invasive imaging technique that uses a radioactive substance to visualize the bones, showing cell activity in the bone.
A radiopharmaceutical called Technetium-99m MDP is injected into your child's veins. Technetium-99m MDP has a tiny amount of radioactive molecules in it.
Once the radioactive substance has travelled through the bloodstream and into your child's bones, a special camera, called a gamma camera, is used to take pictures.
A bone scan can help assess:
- back pain
- bone infection
- occult fracture(s)
- stress fractures and stress injuries
- unexplained bone pain
- damage to the bones due to exercise or trauma
- mandibular hypertrophy/hyperplasia
- osteoid osteoma
- avascular necrosis
There is no special preparation needed for this test.
It is helpful to give your child a simple explanation as to why a bone scan is needed and assure him or her that you will be with him or her for the entire time.
You may want to bring your child's favorite book, toy, or comforting object to use during waiting times or in the imaging room.
We have various DVDs to choose from for your child to watch during the procedure, or you can bring one from home.
Between the injection of the radiopharmaceutical and the scan, there is a three- to four-hour delay. In addition, the scan time is about one hour. Please schedule your day accordingly.
When you arrive, please go to the Nuclear Medicine check-in desk on the second floor of the main hospital. A clinical intake coordinator will check in your child and verify his or her registration information.
A bone scan involves three steps: injection of the radiopharmaceutical, a waiting period, and the bone scan.
Injection of the radiopharmaceutical:
- You will be greeted by one of our nuclear medicine technologists who will explain to you and your child what will happen during the study.
- A tiny amount of the radiopharmaceutical will be injected into one of your child's veins by a small needle.
- You and your child will be free to leave the department and then return three to four hours later for the imaging. The technologist will give you an exact time to return for imaging.
- While waiting, your child can conduct normal activities, including eating and drinking.
- It is important for your child to try to drink extra fluids during the waiting time in order to promote bladder emptying at the time of imaging.
The bone scan:
- When you return, your child will be asked to void/empty her bladder.
- Your child may be asked to change into hospital pajamas and will need to remove jewelry and any metal objects that could interfere with the scan.
- Your child will lie on the table and a large camera will be positioned above and underneath him/her.
- The camera does not make any loud noises and may move slowly around your child's body as pictures are taken.
- Your child may be asked to move into different positions in order for the bones to be viewed from different angles.
It is important that your child remains still during the imaging in order to obtain the best quality images possible. If he/she moves, the images won't be as clear and we'll need to redo the pictures.
The number of images obtained and the total imaging time will vary depending on the diagnosis under consideration, although the average imaging time is about one hour.
Your child may experience some discomfort associated with the insertion of the intravenous needle. The needle used for the procedure is small. Once the radiopharmaceutical is injected, the needle is withdrawn and a Band-Aid is placed over the site of the injection. Your child may be a little sore in the area where we give her the injection.
Although the camera used to take pictures may appear large and intimidating, it does not touch your child.
We are committed to ensuring that your child receives the smallest radiation dose needed to obtain the desired result.
It is safe to be in the room with your child the entire time, even if you are pregnant or nursing.
Nuclear medicine has been used on babies and children for more than 40 years with no known adverse effects from the low doses employed.
The radiopharmaceutical contains a very tiny amount of radioactive molecules, but we believe that the benefit to your child's health outweighs potential radiation risk.
The camera used to obtain the images does not produce any radiation.
Once the bone scan is complete, the images will be evaluated for quality by a nuclear medicine physician. If the scan is adequate, your child will be free to leave and resume normal activity.
The small amount of the radioactive substance in your child's body will dissipate over the first 24 hours following the test and pass out of your child's body through urine or stool. Drinking plenty of water will help to flush the radioactive material from your child's body.
The nuclear medicine physician will provide a report to the doctor who ordered your child's bone scan. Your child's doctor will then discuss the results with you.