EOS Orthopaedic Imaging


Shriners Hospitals for Children – Northern California is dedicated to providing the highest-quality patient care under the safest conditions. Our EOS Imaging System (EOS) is helping us provide the highest quality care while reducing exposure to radiation for our patients. We are honored to bring orthopaedic patients this new technology and are grateful for the funding that was made entirely by donations.

Young girl in an EOS imaging machine

EOS imaging system features and benefits:

  • Provides life-size picture of a patient’s full skeleton.
  • The only 3D system capable of scanning patients in a weight-bearing standing or sitting position, revealing natural posture and joint orientation.
  • Delivers a radiation dose up to nine times less than a conventional radiography X-ray, and up to 20 times less than a computed tomography (CT) scan.
  • Beneficial to scoliosis patients who can require more than 20 total scans over the course of treatment.

Is the EOS available to all patients?

Shriners physicians determine the need for an EOS image and will right orders accordingly.

What is the EOS Imaging System used for?

The EOS is an advanced X-ray system that uses two extremely fine beams to capture 2D and 3D images at one time. The images are then combined into three-dimensional images, enabling physicians to provide a more accurate diagnosis and plan an effective course of treatment. The scans take approximately 20 seconds or less to take and reduce radiation exposure for a developing child by 90 percent overall as compared to a conventional X-ray machine.

How can reducing radiation exposure help patients?

Reducing radiation exposure can have positive long-term effects, particularly in cases where children are diagnosed with skeletal disorders of the spine or extremities that require repeated scans over time.The lower radiation is particularly important for children with spinal abnormalities, who will be monitored throughout their lifetimes.

How is an EOS system different from a standard X-ray system?

EOS is different from conventional X-Ray machines in several ways:

  • It uses two images to construct one 3D image.
  • It uses extremely fine beams of radiation, reducing radiation exposure for each scan by up to 90 percent compared to a standard X-ray.
  • Patients are scanned while standing up and while bearing weight—both of which are crucial for planning successful orthopaedic surgeries.
  • EOS is safe and patient- and operator-friendly.

What can a patient expect during the EOS imaging experience?

Patients can expect the EOS experience to be convenient, comfortable, fast and non-traumatic.

If my child is scheduled for X-rays, can I request that they be taken on the EOS machine?

Your Shriners physician will order the appropriate X-ray for your child’s condition.

How old does a child have to be to get an X-ray on the EOS machine?

A child needs to be able to follow directions and stand completely still, by himself, in the EOS machine for up to 20 seconds.

What if my child can’t have an EOS X-ray? Are regular X-rays still safe?

Yes. All X-rays performed at Shriners Hospitals for Children – Northern California use the lowest radiation dose possible to produce the highest quality images. We follow the ALARA imaging standard: As Low As Reasonably Achievable.