North American Spine Society Annual Meeting
North American Spine Society Annual Meeting
October 10, 2019
1 min read

Low-dose radiography protocol was accurate for use with idiopathic scoliosis curves

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CHICAGO — Cobb angle measurement and radiographic follow-up after curve correction could be reliably performed in patients with early onset idiopathic scoliosis using a low-dose radiographic system, according to results of a prospective data collection study presented at the North American Spine Society Annual Meeting, here.

Tristan Langlais, MD, MSc, of Paris, and his colleagues studied the efficacy and safety of a freestanding, biplanar, low-dose stereoradiography system and hypothesized its use could be a minimally invasive method to evaluate children younger than 6 years of age with early onset idiopathic scoliosis (EOIS).

The researchers evaluated intraoperator and interoperator reliability of this 2-D technique when it was used by three observers to measure Cobb angles for 41 patients with EOIS and a mean age of 4 years. The mean Cobb angle was 22°, which ranged from 10° to 80°.

The Cobb angles were measured two different times by the observers using the pedicle line method, Langlais noted.

“The dose of radiation was two-times less than digital X-ray,” he said.

Concerning the results, “the reliability of the study was good, regardless of the Cobb angle and age of children,” Langlais said.

“Cobb angle measurement on low-dose stereoradiography is feasible and reliable in idiopathic scoliotic curve before 6 years old using the pedicle line, despite the bone immaturity,” he said. – by Susan M. Rapp


Pietton R, et al. Abstract 203. Presented at: North American Spine Society Annual Meeting; Sept. 25-28, 2019; Chicago.

Disclosure: Langlais reports no relevant financial disclosures.