The consistency of an optical body surface scanning method compared with computed tomography: a validation study.

Area of Science:

• Medical imaging
• Biomechanical analysis
• Pediatric surgery

Background:

• Pectus excavatum (PE) evaluation lacks a standardized noninvasive method.
• Computed tomography (CT) scans are conventional but involve radiation exposure.
• Accurate assessment is crucial for guiding treatment decisions in PE.

Purpose of the Study:

• To validate the accuracy of optical body surface scanning against CT scans for PE assessment.
• To compare measurements of PE severity using both methods.
• To determine the reliability of optical scanning for clinical use.

Main Methods:

• A 3D optical scanner (PrimeSense) collected body surface data from 40 PE patients.
• Haller index, external Haller index, and depth ratio were calculated from both optical scans and CT scans.
• Statistical analyses, including Pearson and intraclass correlation coefficients, were performed to assess consistency.

Main Results:

• Optical body surface scanning demonstrated good correlation with CT scans.
• Pearson correlation coefficients were 0.63 for external Haller index and 0.84 for depth ratio.
• Intraclass correlation coefficients were 0.56 for external Haller index and 0.80 for depth ratio, indicating reliability.

Conclusions:

• Optical body surface scanning is a reliable, noninvasive tool for measuring PE severity.
• This method is suitable for routine monitoring of PE progression and treatment response.
• It holds particular promise for pediatric PE management, reducing radiation exposure.