Статьи | Клиника Ихилов

EOS imaging system

​The EOS imaging system is based on the invention that won the Physics Nobel Prize for low dose particles, and it is now in use in Israel for the first time, only at the “Dana Dwek” Children’s Hospital at the Ichilov Medical Center in Tel-Aviv. The EOS system is groundbreaking because it can scan the patient while standing and allows for 3D reconstruction of the images. The system receives the X-ray radiation from two planes simultaneously and it can then integrate the two planes and generate 3D reconstructions, all through using a particularly low dose of radiation.

08, Jan 2019

Reduced dose of radiation

The EOS system emits radiation at a dose up to 2-3 times lower than general radiography and more than 20 times less than computed tomography (CT). In spinal imaging – up to 85% less radiation compared to computed radiography (CR) at an equal or superior quality. In lower extremities and entire spine imaging – 50% less radiation compared to digital radiography (DR). Axis tests and lower extremities’ structural deformities with a radiation dose 95% lower than computed tomography (CT). In addition, there is also a protocol for performing a test with an ultra-reduced dose where all the above mentioned doses are reduced by 10 times more.

According to Dr. Dror Ovadia, director of the Pediatric Orthopedics department, at the “Dana-Dwek” Children’s Hospital, at the Ichilov Medical Center, “the dose reduction is particularly helpful and beneficial in children who need to undergo frequent imaging tests, such as children with spinal deformities like scoliosis. The innovative system gives us doctors a better option for monitoring these children and monitoring the progress of the disease”.

Additionally, the device also reduces the amount of time it takes to perform the scan to 10-25 seconds only. The EOS technology provides real size pictures, at a scale of 1:1, to be used for surgical planning and for monitoring bone and articular diseases.

Better diagnosis and image accuracy

“The 3D images of children in the standing position allows us doctors to get an accurate view of the spine and lower extremities, the interactions between joints and the rest of the skeletal system, particularly the spine, hips and legs, so that we can assess balance and posture, and examine the bones, joints and ligaments from several angles”, explains Dr. Ovadia and adds that “this type of imaging allows us to look at all the areas of the body in one imaging instead of piecing together several images. Such an imaging allows for an accurate view of the musculoskeletal system, which is vital for diagnosis and for treatment planning”.

What is the EOS imaging used for?

The EOS device is primarily used for the assessment of patients with deformities of the spine, pelvis, hips, knees and lower extremities; making an estimate of the lower extremities’ length and angles, rotation of axis vertebrae in the spine or in the bones of the lower extremities, measuring physiological parameters of the spine, such as kyphosis (lordosis), and all the relevant orthopedic clinical parameters that are calculated and saved in the system.

One of the known limitations of studies conducted on spine deformities is the use of 2D imaging. Idiopathic scoliosis is known as a three dimensional deformity of the spine. Routine scoliosis imaging do not facilitate an accurate assessment of the axial dimension (vertebral rotation) and often underestimates the deformity in the vertebral bodies’ structure. By enabling a simultaneous imaging of two planes followed by 3D reconstruction, the EOS system produces improved measurements which result in a better understanding of the three dimensional deformity

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