When it comes to getting an X-ray or CT scan, many people – especially parents of young children and teenagers – are concerned about radiation. For some patients, EOS is an appropriate imaging alternative that reduces radiation exposure.
EOS imaging is a low-dose, weight-bearing X-ray technology. It can simultaneously take full-body, frontal and lateral (side view) images of the skeletal system of a patient in a standing or sitting position, using significantly less radiation than traditional X-rays or CT scans.
Using EOS, two dimensional (2D) and three-dimensional (3D) orthopedic images can be produced to assist doctors with the diagnosis and treatment of medical conditions of the spine, hips and knees.
EOS imaging is used for anatomical assessment of the entire musculoskeletal system and is invaluable for evaluating the following conditions:
EOS can also support orthopedic surgeons with their presurgical planning, because it records and displays the patient’s anatomical structures in their true, size and volume, lengths and angles. This allows surgeons to perform highly precise presurgical planning and postsurgical assessment for hip replacement and knee replacement surgeries.
During an EOS exam, the patient stands or sits in an upright position inside a special scanning cabin. Two very narrow X-ray beams – one vertical, one horizontal – scan entire body to create 2D and 3D images of the spine and joints.
Unlike traditional X-ray imaging, where the patient may have to be repositioned to get views from different angles, these two simultaneous scans provide all the imaging necessary. Capturing frontal and lateral (side-view), full-body images takes less than twenty seconds. If a full-body image is not necessary (such as for a knee condition), the EOS system can be set to scan a particular region of the patient’s anatomy.
A typical EOS scan at HSS has a radiation dose equivalent to about one-third that of the dose of a conventional X-ray of the same body parts.
EOS is a pediatric-friendly scan. For some children and teens who require frequent imaging to monitor progress of a chronic skeletal or musculoskeletal condition (such as scoliosis), multiple doses of radiation from standard X-rays may unnecessarily increase their life-long radiation exposure. EOS can effectively replace standard X-rays in these instances and thereby reduce any risks associated with radiation exposure over their lifetime.
In some cases, an EOS scan can be used in lieu of a CT scan. For example, precision measurements of a patient’s leg length can be measured from an EOS scan in place of a CT scanogram, which is traditionally used to measure limb length discrepancy.
Advancements in clinical use cases for EOS continue to be investigated, and there may be additional CT scan alternatives soon.
EOS imaging is available at HSS in New York City and White Plains, NY, in these locations: