An evaluation of the EOS X-ray imaging system in pelvimetry

Area of Science:

• Medical Imaging
• Radiology
• Obstetrics

Background:

• Accurate measurement of pelvic dimensions is crucial for assessing obstetric prognosis.
• Computed tomography (CT) is a current gold standard but involves significant radiation exposure.
• There is a need for reliable, lower-radiation alternatives for pelvimetry.

Purpose of the Study:

• To evaluate the reliability of the EOS imaging system for measuring internal bony pelvis diameters.
• To compare EOS measurements with manual and CT-based pelvimetry.
• To assess the potential of EOS as a new gold standard for pelvimetry.

Main Methods:

• A prospective study involving 18 dry pelvises.
• Comparison of four pelvimetry methods: manual, EOS, spiral CT, and sequential CT.
• Measurement of obstetric diameters to the millimeter.

Main Results:

• EOS measurements showed high correlation with manual measurements for key obstetric diameters (Magnin index, obstetric conjugate, median transverse diameter).
• No significant differences were found between EOS and CT methods, except for the interspinous diameter.
• High statistical significance (P < 0.001) confirmed the reliability of EOS measurements.

Conclusions:

• The EOS imaging system provides reliable ex vivo determination of obstetrical diameters.
• EOS measurements are comparable to CT, suggesting its utility for estimating obstetric prognosis.
• This low-dose technique presents a potential radiation-sparing alternative to CT for future in vivo pelvimetry validation.